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When you say that your AC "keeps running", does it ever stop? Or does it keep going forever? I know that many thermostats actually cool a few degrees below the target temperature and dont kick in till a few above said temp (usually a delta of 2F). As a few people have said in the comments, it could be that your blower is set to "on" even though it ...


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You're going to have to go look in the air handler, to determine how the control wiring is connected. The thermostat is nothing but a fancy switch, so it doesn't tell you much about how the system is wired.


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Late answer, but I did this on my cooler. Since my thermostat requires batteries, it doesn't use the C connection. Run one lead of 24ac to the thermo (R) then take (Y) from the thermo to one input of relay coil. Take other lead of 24ac and connect to the other input of relay coil. The black wire goes the the 24vac transformer. The grey wire going ...


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This is the most common problem with the Nest. You need to hook up a "C" wire. Here's the thing. Originally, thermostats were passive devices - nothing more than switches. And so, controls were wired in a "switch loop" similar to how switches in houses were wired before current electrical code. Power went in a functional loop: from the 24V ...


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Not sure if my system is exactly the same, but I have to run the pump and boiler to get HW and the pump, boiler & a valve to get heating. The valve is a simple looking bypass thing with just live, neutral and earth and is sprung return. Now according to NEST such a system isn't compatible. However, I've wired with the live going to 2 and 6 (that's right, ...


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There should already be a transformer on the unit. I believe it's on the back of the unit, mounted to a junction box. There should be two exposed terminals on the transformer. One is R, and the other is C. To determine which is which, use a volt/multimeter to measure AC volts between the R wire going to the thermostat and the transformer terminals. One ...


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You just need a multi pole switch. If you are using a T-stat that uses batteries you may only be using two wires to actuate the circuit. In that case get a double pole double throw switch. (If you are using three wires you will need a triple pole double throw.) Like this one. Connect your thermostat to the center terminals and the boiler and the wood ...



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