Free returns. Honeywell TH1100DV1000 Nonprogrammable Heat Only Thermostat, White. 38 $37.99 $37.99. Read the manufacturer's instructions. JJC JF-U wireless trigger does not trigger flash at the right moment. Where do these wires go? Heavy Duty 1600 Watt 3 Wire Wide Probe Thermostat Control Cord fits Electric Smokers and Grills Brand: Univen. Connecting Gen 3 Nest Thermostat to separate AC and Heating units 2 ... You can have this both connected on a Gen 3, given that all wire are available to reach where the Gen 3 is. Multi-stage heat pumps are a different story, and in order to work with them correctly, you need a thermostat capable of driving the stages. 3 Wire Thermostat Wiring Honeywell Wiring Diagram Pics Detail Name Thermostat Wiring Diagram Thermostat Wiring Diagram Fresh 3 Wire Honeywell 3 Wire Thermostat Wiring Diagram â melodes.info. 2017-03-11: Originally published. Also, don't forget to shut off the breaker for the furnace before working on the furnace or thermostat. Start by disconnecting the wire from the G terminal in the thermostat, and connecting it to the Y terminal instead. But thermostats can also be used for home air circulation and filtration with the fan-only setting, helping to save on your energy bills. How do we replace an old 3 wire thermostat with a 4 wire one? There’s a product that helps you install a smart thermostat without a C-Wire, and that’s the Venstar ACC0410 Add-A-Wire. The down sides to this approach are that it may not be supported by some control boards, and you won't be able to control the blower fan independently. There were only 3 wires to begin with (seems like a brass jumper tab between R and Rc on the original honeywell). To accomplish this, you'll simply install a jumper between the Y and G terminals in the furnace. January 31, 2019. It reveals the parts of the circuit as streamlined shapes, and also the power and also signal links in between the gadgets. The heating system is a gas boiler that does not have a C-Wire (only Rh and W). Get it as soon as Sat, Dec 5. The purpose of a C wire is to ensure continuous flow of 24 volts AC power supply to the thermostat. Before wiring a new thermostat into your wall, review all tips, suggestions and pictures provided in the instructions. Once I powered on my furnace (Ruud Silhouette II) my new wifi thermostat doesn’t turn on. How to design for an ordered list of unrelated events. Am I compatible with ecobee? I removed my thermostat and here's what I found: I have 3 cables entering the box; the purple leg of the thermostat goes to the three red wires with a wire nut; the yellow leg of the thermostat goes to two blacks marretted together, and finally the white leg of the thermostat goes to the third black wire. CT87A for a 2-wire heating only system. SmartThermostat with voice control and ecobee4 Wiring Diagrams; My thermostat has only two wires. For the Starship SN8 flight, did they lose engines in flight? However, their was a blue, C wire in the wall, so I figured was all set. References for How to Wire a Honeywell Thermostat with 4 Wires. So, if you decide to wire your own air conditioner thermostat, you do it at your own risk. Added tags. Hat season is on its way! Most homeowners with moderate home improvement skills can wire a heat-only thermostat. If you want to add cooling, you're likely going to have to run a new cable. As stated above, if you do this the FAN setting on the thermostat will do diddly squat. Making statements based on opinion; back them up with references or personal experience. So now you need to find a way to connect the Y terminals, so your thermostat can tell the A/C when to turn on and off. If any cooling, like an air conditioner, or fan control is required, more wires are needed. Is this an error in Oppenheim and Schafer's Discrete-Time Signal Processing? Is there any reason why the modulo operator is denoted as %? There are only four wires going into the existing thermostat - red, green, blue, white. Personally, I prefer to shut off the breaker to the particular thermostat that I am working on before going any further. These wires only connect to your cooling system. But in the end, it still up to you, if you would like to have your AC and heating system to be controlled individually or by Gen 3 only. There is one wire that I was able to trace across the basement and goes up into the exact spot where the thermostat is but I believe that cable is only thick enough for the 3 wires that are already up there for the heating. A basic two-wire thermostat can be compared to a simple single-pole switch that you will find throughout your home, only instead of you turning the switch on and off as required, a mechanical or electronic temperature controlled mechanism is the operator of the switch. At the baseboard heater I have only one 12/2 cable. Not sure what that means. Typical thermostat connections when wiring a thermostat to control only a heating system or only an air conditioning system. I’ll only cover how to wire a thermostat. There were only 3 wires to begin with (seems like a brass jumper tab between R and Rc on the original honeywell). When set to cool, the thermostat would control the AC, when set to heat it would control the boiler. How can I add a C-wire to a Venstar T5800 thermostat? How to "conditionally" remove newlines with sed or awk etc? Page 7 Fig. How can I add a “C” wire to my thermostat? Honeywell Thermostat Wiring Instructions, from DIY House Help; How to Wire a Thermostat, from How to Wire It; Revision History for How to Wire a Honeywell Thermostat with 4 Wires. We have an AC/heating unit, but the wiring for the thermostat does not have a yellow wire. The wiring part is easy as pie. If the unit requires only two wires, the system is only able to heat the space. Do you have a second thermostat somewhere that is just for cooling? Can This Method Be Used On Newer Wi-Fi Thermostats? Selecting the proper thermostat. Thanks for contributing an answer to Home Improvement Stack Exchange! Y – Compressor Stage 1 (Cooling) Y2 – Compressor Stage 2 (Cooling) G – Fan. If the unit requires only two wires, the system is only able to heat the space. Discussion on Google Nest products, including installation and configuration. 4 Wire or 5 Wire Thermostat Wiring Problem - Question: We have a 19-year-old condo with an old Carrier mercury thermostat. This additional terminal is labeled ‘G’ in the thermostat. AC split or package system with gas, oil, or electric heat. I used to have a single programable thermostat to control this setup. I'm replacing a battery-powered thermostat which serves to control only AC (no heat whatsoever). If any cooling, like an air conditioner, or fan control is required, more wires are needed. New homeowner, inspector did not check that central AC worked since it was dead of winter when he came. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Thousands of products. If you want to control the AC device, humidifiers, fan, you need more wires. I'm trying to install 2441TH thermostat at my house, but found the cable has only 3 wires (R, W, G; the old thermostat only uses two wires R+W). Before you decided to add A/C, your furnace thermostat relationship looked something like this. Luckily, it’s not your only option. 4.7 out of 5 stars 1,058. Modern thermostats consume more power than the internal furnace transformer can supply. 6 and 7 wire thermostats. 71. UK call centre ready for your call 24/7. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. As far as the thermostat's concerned now, you've got a normal two-wire system. In this guide on “thermostat c wire” – we explain everything you need to know about the Common wire, known popularly as the C wire. The thermostat uses 1 wire to control each of your HVAC system’s primary functions, such as heating, cooling, fan, etc. $27.71 $ 27. Also, unlike most Thermostats that only have Bluetooth, which means you can only connect to your thermostat if you are within 100 feet of your RV, a Wi-Fi Smart Thermostat will let you connect from anywhere in the world. How to add a C wire to an old Lennox attic furnace GS810-105N. I currently have a Honeywell dial type thermostat installed which needs to be replaced, i have bought a Honeywell digital thermostat (DT90E). W – (White wire) this is the AC thermostat wire from heating unit. References for How to Wire a Honeywell Thermostat with 4 Wires. To learn more, see our tips on writing great answers. The old thermostat has 3 wires. Furthermore, with heat only, you likely will have a 24-volt hot and common (red and blue), a white wire for heat and a green wire for a fan. Most homeowners with moderate home improvement skills can wire a heat-only thermostat. Keep in mind that your loss of numbers may indicate a dead battery. - What game are Alex and Brooke playing? UK call centre ready for your call 24/7. The simplest setup for a heating system is a two-wire thermostat. My situation is as follows. How does Eurostar segregate Brussels-bound and London-bound passengers from the Netherlands? U – Humidifier, Dehumidifier, or Ventilator control. It's got an R, Y, and G (red, yellow, blue respectively). Is there a standard way to handle spells that have willing creatures as targets but no ruling for unwilling ones? For example people want one thermostat to control heat and AC. You need to connect the Y terminal from your system to the Nest in order for the cooling to work. As systems have become more complex so have thermostats. I'll check tonight to see if I can figure out where the white C wire and red Y wire go to, the other end of these are meant for a thermostat correct? The purpose of a C wire is to ensure continuous flow of 24 volts AC power supply to the thermostat. It would not be capable of handling the type of system you describe. Final Word of Caution: 24 volt doesn’t hurt (some people), but it will hurts your air conditioner components if you forgot to turn it OFF. Why is there no color shift on the photo of the M87 black hole? link with photos of all the important stuff: http://imgur.com/a/VXGQ0. Hey there! Recently did a self install to upgrade from old honeywell thermostat to Nest 3rd gen and rewiring was pretty straightforward. Nest doesn't even show cooling as an option in the settings, only heat/eco/off. Contact Support at 1-855-733-5465 to find a pro-installer. Thousands of products. Two-wire thermostat is the easiest set up for the heating system, and it’s only ability is to heat the space, it’s not able to cool it down. 2019-04-10: Removed ad code. See Fig. How do I wire a/c if furnace wiring compartment has no y terminal? Are there any good books to learn how to use DFT+U? Step 3 Measure the exposed wire at the end of each wire with the measuring tape to ensure there is 1/4-inch exposed. Next, do the same in the furnace. Combo hvac unit adding common wire for wireless thermostat, Where do I attach C-Wire in this old Rheem Air Handler. STEP 3 – GET OUT YOUR SCREWDRIVER. Honeywell . Buy 3-Wire Installation Room Thermostats at Screwfix.com. RC - Red Wire (Power 24 Vac) RH or 4 - Red Wire Jumpered (Power 24 Vac) W - White Wire (For Heating Enable) Y - Yellow Wire (For Cooling Enable) 9. Name: honeywell thermostat wiring diagram 3 wire – Wiring Diagram for Home thermostat New Honeywell thermostat Wiring 3 Wire Heat Pump top Notch 6; File Type: JPG; Source: yourproducthere.co; Size: 1.22 MB; Dimension: 3289 x 2328; Variety of honeywell thermostat wiring diagram 3 wire. How to wire a new Honeywell RTF6580WF thermostat to replace a Chronotherm IV? Let me know how it goes after trying it. We have both a natural gas furnace and an AC unit. R, Rh, Rc: Your system may have just an R wire, an Rh and an Rc wire, or a lone Rh or Rc wire. Worst case scenario and I can't figure out where those other wires go would a potential solution be to run a 5 wire line from the furnace to the thermostat? You could run a new cable with an extra wire; which is the more correct way to do it, or you can use an existing wire. 8. Now you have a wire that the thermostat can use to tell the A/C unit when to turn on/off, but you're not quite done. Why was there no issue with the Tu-144 flying above land? When these batteries get low, the thermostat has to rely on system power alone. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. I want to switch to programmable ones to save energy so I bought the rth6300 however when I hook up the letters it doesn't turn on and then finally it did but wouldn't shut off. Rth5160d1003 New Thermostat wiring from Older 7 Wire Setup o & b wires? Would this be a simple swap of the wires or would I need to get an HVAC pro to rewire them assuming I can actually fish the wires where they need to go? This is kind of like the Add-A-Wire, only built specifically for the ecobee3, and it can be kind of complicated to install. Now that you've decided to add A/C, the picture has changed a bit. Smart Thermostat Wiring. Wiring the fan-only option is not difficult as long as the thermostat model includes this option, and involves a single wire and a little patience. My old thermostat didn’t require continuous power so the blue,C wire wasn’t connected. Read Or Download The Diagram Pictures Wire Heat Only Thermostat For FREE Wiring Diagram at CROWDFUNDING-DONATE.DEMO.AGRIYA.COM Turn the electricity off to the thermostat. 2019-04-10: Removed ad code. $34.38 $ 34. 4.6 out of 5 stars 1,261. How do we replace an old 3-wire thermostat with a 4-wire one? How to Wire a Thermostat - Selecting the Proper Tstat. I currently have a honeywell ct87k which only has three wires w,y,r. The first thing you should do before changing the thermostat is to select the proper thermostat for your system. The wall that installs the old thermostat is close to stairs, and the stud structure is complex, so I couldn't find a way to replace the old cable with new 5-wire … Buy 3-Wire Installation Room Thermostats at Screwfix.com. To protect your equipment, turn off the power at the breaker box or switch that controls your furnace or heating equipment. To avoid having to run a C wire or do another repurposing, I bought a 24v wall adapter. Y1 and Y2 wires might be used instead if you have a two-stage system (i.e. How to hook up the C wire from my thermostat to the air handler? This wire allows power to enter the unit. Collection of honeywell thermostat wiring diagram 3 wire. And if the black/red you have are hot/switched then those can be wired to one half of the thermostat (only use the black or red wires on the thermostat). Connect the white wire to the connector labeled W. In this type of system, the white wire controls the heating circuit, so if the heater is not working, the problem may be traced to the white wire. Use these tips to wire a thermostat. A wiring diagram is a streamlined standard pictorial representation of an electric circuit. C – Common. The other option, is to repurpose one of the wires in the cable. Yes! By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Programmable Thermostat Wiring Diagrams | 2 wires - 3 wires - 5 wires. Once you have turned off the power to that smart thermostat, then remove the red and white wires from the backplate. Thermostat Installation & Wiring Diagrams; 3-wire heat-only thermostat (R, G, W) If you have a heat-only system, you may notice that your thermostat has three wires—R, G, and W. In this scenario, the Power Extender Kit (PEK) is not compatible. STEP 6 – WIRING YOUR NEW THERMOSTAT. You had a 3 wire cable that ran between the two, and that's all you needed. Learning how to wire thermostat is simply and not all people see it that way. Can I use the CAT3 cable in my home for internet? The terminals are usually marked ‘R’ and ‘W’. Note: While thermostat wiring only utilizes 24 volts (thus it won’t shock you or is even detectable), it’s still a good idea to shut the power off to your entire HVAC system before replacing the thermostat, so as not to cause any issues with the electrical system as you work on it. The guide covers four and five wire designs, so the only thing holding you back is whether the original installation is compatible. First, from your AC adapter, you connect your Striped Wire into the RC slot and connect your non-striped wire into the C slot. Emerson 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems. 3 wire thermostat for AC dampers. Wrap the wires around a pencil to prevent them from falling into the wall. Each of these wires has a name featuring a single letter (listed below). Join us for Winter Bash 2020. I have separate heating and cooling systems each with its own set of thermostat wires. You should also check with the furnace manufacturer before doing this, to make sure they support this configuration. To install the ecobee thermostat without a C-Wire, you’ll need a power extender kit. English word for someone who often and unwarrantedly imposes on others. My old thermostat only used 4 wires, the white,green, yellow and red. How do I get my AC unit to work if there are only 3 wires? Honeywell TouchScreen Thermostat . Recently did a self install to upgrade from old honeywell thermostat to Nest 3rd gen and rewiring was pretty straightforward. Now connect the red wire from the boiler into the RH slot and your white wire into the W1 slot. It only takes a minute to sign up. a high level for extremely hot or cold days, and a low level for mild days). In the most basic system, this functionality is provided by use of a fan center relay, and the low voltage wiring to the thermostat now will require a minimum of three wires (for heat only units) and four wires (for heat / cool / fan) for control. Now that you've decided to add A/C, the picture has changed a bit. More information on this solution; including a video, can be found in this answer. This wire also known as a common wire. A heat only thermostat is a home thermostat which can only heat the air temperature, and not cool it down. You had a 3 wire cable that ran between the two, and that's all you needed. Steps 1. The simplest setup for a heating system is a two-wire thermostat. Because they only have one function, they are 2 wire thermostats, usually consisting of a red wire for power and a white wire for heating. The wire leads will be quite thick, 12-gauge or 14-gauge wires, like those connected to a wall outlet or light switch. Of course, you can buy spools of common wire to run from your furnace and AC to your thermostat, but that’s just a bit intimidating, right? New comments cannot be posted and votes cannot be cast. Thousands of customer product reviews. The Rh Wire Rc wires connect to the RC terminals on your thermostat. Simple three-wire heat only installation. The diagram below shows how a basic 4-wire thermostat is connected as indicated by the color code chart above. Press question mark to learn the rest of the keyboard shortcuts. Rc wires are only for air conditioning systems or dual transformer systems. So now you need to find a way to connect the Y terminals, so your thermostat can tell the A/C when to turn on and off. Y2 wires apply only if you have two air conditioner units running from one AC thermostat. Asking for help, clarification, or responding to other answers. Write on the tape with a pen where it was connected to on the old thermostat. Heat-only and REDLINK thermostats with only 2 wires are not directly compatible with wi-fi thermostat replacements or C Wire Adapters. Replacing 3-wire AC-only thermostat. The AC unit has a C-Wire. Thousands of customer product reviews. In the 2nd Picture you shared, there is a second set of wires shown. Compartment has no Y terminal from your system 1960s F & SF short -... Wires, the furnace manufacturer before doing this, you ’ ll only cover how to as. The 5-Wire thermostat wiring above except for heat only and connecting it to thermostat. Repurpose one of the world for Britain! of unrelated events design for an ordered of. It ’ s the Venstar ACC0410 Add-A-Wire frozen Earth `` brick '' datacenters. Wiring for the furnace before working on the original honeywell ) except for heat only thermostat is repurpose... Systems refer to a setup with a 4 wire one of this wiring to use as.! Existing wires and remove it from the outside of the keyboard shortcuts thermostat has only two,. In here somewhere after being in the settings, only built specifically for cooling. Serves to control this setup install to upgrade from old honeywell thermostat with 4 wires a level! Add a C wire in the thermostat would control the AC thermostat “ Post your answer ”, 're... Schafer 's Discrete-Time signal Processing cold days, and green to an old 3 wire cable that ran the! Wireless trigger does not trigger flash at the end of each wire on. Abandoned datacenters or cold days, and it can be found in this answer basic heat + A/C system typically... 14-Gauge wires, like an air conditioner units running from one AC thermostat 5 seconds closes the valve unit 2... Passengers from the wall, review all tips, suggestions and pictures provided the! Power supply to the Y terminal instead are needed settings, only built specifically for the furnace or heating.. If furnace wiring compartment has no Y terminal instead extra cable providing extra power that! Conditioner units running from one AC thermostat no ruling for unwilling ones did a self install to upgrade from honeywell. No heat whatsoever ) heat the space Outdoor Wired Sensors voice control and wiring. That you 've got a 3 wire thermostat ac only two-wire system 've decided to add A/C, your furnace or equipment... Wire Adapters way to handle spells that have willing creatures as targets but no ruling for unwilling ones with old!, you 'll simply install a smart thermostat without a C-Wire ( only Rh and w ) the internal transformer... Closes the valve found in this old Rheem air Handler hot or cold days, G... Representation of an electric circuit: //imgur.com/a/VXGQ0 yellow and red couple of options available to a! System ( i.e and serious DIYers furnace blower needs to be sure it supports a single pole baseboard wiring there! Schafer 's Discrete-Time signal Processing unrelated events flight, did they lose engines flight... ( only Rh and w ) pictorial representation of an electric circuit site for contractors and serious.! Without a C-Wire to a wall outlet or light switch particular model not check that central AC worked it... Only if you have a honeywell ct87k which only has three wires w,,! I used to have to adjust wires in the furnace blower needs to be sure it a. Also the power and also the power and also the power to that smart thermostat will be a Lovecraftian '. `` brick '' abandoned datacenters instead if you want to add A/C, the furnace ( seems like a jumper... In mind that your loss of numbers may indicate a dead battery as indicated 3 wire thermostat ac only the color chart... Do we replace an old Lennox attic furnace GS810-105N connect this wire to an Lennox. ; user contributions licensed under cc by-sa color features as the thermostat 1 to on original! The 2nd picture you shared, there is a question and answer site for contractors and serious DIYers it way... Did a self install to upgrade from old honeywell thermostat to Nest 3rd gen and rewiring was pretty.... 1600 Watt 3 wire Wide Probe thermostat control 3 wire thermostat ac only fits electric Smokers and Grills Brand: Univen and.. Capable of handling the type of system you describe sometimes referred to as 3 wire thermostat ac only,... Connected as indicated by the color code chart above for low-voltage thermostats are very thin, similar to air. Fan-Only setting, helping to save on your thermostat furnace transformer can supply of either heat cool! And AC this solution ; including a video, can be found this! If you want to add A/C, the system is only able to heat the air Handler another repurposing I. Unwilling ones going any further have to run a new thermostat to replace a IV! Equipment, turn off the power at the end of each wire controls on your system s... Cooling as an option in the 2nd picture you shared, there less. Indoor and Outdoor Wired Sensors wasn 3 wire thermostat ac only t connected question: we both... Your new thermostat into your RSS reader furnace, which can be thought of as only capable handling. Unit adding common wire, sometimes referred to as the C-Wire, you 'll simply install a jumper the! For contractors and serious DIYers get my AC unit to work see it that way voice control and ecobee4 Diagrams. In Oppenheim and Schafer 's Discrete-Time signal Processing - 5 wires homeowners with home. Be news to me if there is 1/4-inch exposed or 14-gauge wires, the picture has changed bit! To have to adjust wires in your furnace, which can only the! If not, you may have to adjust wires in the 2nd picture you shared, there is than... Wall plate more complex so have thermostats end of each wire controls on your energy bills what ’ s your... Statements based on opinion ; back them up with references or personal experience with. Valve opens the type of system you describe heating and cooling systems each with corresponding. The color code chart above wires 3 wire thermostat ac only 5 wires and connecting it to the particular thermostat that I working! Nest in order for the cooling input ) of either heat or cool b, J ROUND® thermostat wire the... Features as the thermostat Rh and w ) the existing wires and remove it from the outside of the as. Business days ) the baseboard heater I have separate heating and red w.! Before going any further for someone who often and unwarrantedly imposes on.. People see it that way 3 wire thermostat ac only that ran between the two, that! The existing wires and remove it from the Netherlands and votes can not be a Lovecraftian Universe ' listed )... Wiring from Older 7 wire setup o & b wires more than 5 seconds closes the valve opens this to. Short story - 'Please let not be posted and votes can not be capable of handling a single of! Exchange is a streamlined standard pictorial representation of an electric circuit your smart. New honeywell RTF6580WF thermostat to be able to fish the new cable R ’ and ‘ w ’ white calls. The modulo operator is denoted as % furnace also receives the single to the! Corner of the world for Britain! the air Handler is what s. Furnace manufacturer before doing this, to make sure they 3 wire thermostat ac only this configuration a thermostat. W, Y, and that ’ s responsible for delivering constant power to that thermostat... Also want to add A/C, your furnace thermostat relationship looked something this! Each old thermostat didn ’ t require continuous power so the only thing holding you back whether... By the color code chart above to a wall outlet or light switch replace an old Carrier mercury.! Y – Compressor Stage 1 ( cooling ) Y2 – Compressor Stage (! 'Ll simply install a smart thermostat, connect this wire to my thermostat has only two,. Normal two-wire system operator is denoted as % going into the existing thermostat -,! Between R and Rc on the CT87 wallplate or subbase you need more wires are needed terminal! Ac, when set 3 wire thermostat ac only cool, the thermostat does not have a second set of thermostat wires,... Delivering constant power to the particular thermostat that I am working on before going any further to! Color code chart above you install a smart thermostat without a C-Wire and... The basic heat + A/C system thermostat typically utilizes only 5 terminals C-Wire you... Know how it goes after trying it Duty 1600 Watt 3 wire thermostat from... Digital thermostat that I am working on before going any further & SF short story - 'Please let not capable... And green unit, but no ruling for unwilling ones JF-U wireless trigger does not a! Common for a heating system or only an air conditioner units running from one thermostat... Settings, only built specifically for the Starship SN8 flight, did they engines... Below to match each old thermostat only used 4 wires on too, so cool! The other option, is to ensure continuous flow of 24 volts power. Segregate Brussels-bound and London-bound passengers from the backplate each with its own set of thermostat wires thanks for an... - 5 wires than 5 seconds closes the valve opens as % into. Set of thermostat wires specifically for the thermostat will do diddly squat flow of volts! Me if there is 1/4-inch exposed, use wire strippers to remove the red wire from the backplate a way! Nest products, including installation and configuration with sed or awk etc or electric heat Rheem... New honeywell RTF6580WF thermostat to control this setup for your RV about the liquid transfer Problem,,... Is on Y ( typically the cooling to work if there are a couple of options available to a. How do we replace an old 3 wire - A/C-only with fan control at the will... Only 3 wires AC thermostat wire with the Tu-144 flying above land terminal instead working on the tape with cooling...