Had this problem this past winter, just never had it fixed. The ac runs fine, but when the heat is on, cold air blows constantly and will not turn off even when thermostat is turned to off. Had to cut it off outside to get it to stop or pull fuse out. Repairman replaced the relay switch, but that didn't work. Any ideas? Thanks.
I agree with that guy, theres something wrong with your description. If you turn your thermostat to the off position and the fan to the auto position, does the air still blow out of the vents even after a 2 minute delay? If so, then it could be a bad thermostat, or a bad control board.
Your symptoms don't make much sense. You said a/c works fine but in the winter cold air blows even if t-stat is off. Does that mean that the only time the outdoor unit will shut off is when you have the a/c on and the temp inside gets cool enough to cycle the unit off? Need more info to answer properly. What kind of stat? is it a split system or pkg unit. Do you have back up electric heat? When you pull the fuse is it just to the outside unit or to the whole system? What is the brand and Model number? Add details with this info and I will edit my answer. Edit: Ok that helps a little but still doesn't clear things up all the way. The Payne M# you have given is actually a 3 ton packaged air conditioner with integral gas heating. A heat pump would be M# PH1Pxxxxxxx. This raises a whole new set of possible issues. It sounds like you have an issue with the gas heat section. It doesn't sound like the furnace is firing since you say it only blows cold air, that could be many different things in this particular unit. Make sure both the gas shut off valve on the gas line outside the unit is on and the switch on the gas valve inside the unit is on. Beyond that, there could be an issue with the inducer motor or one of the safeties in the heat exchanger section. or the logic board or ignition module or possibly even the gas valve. It sounds like you need a really knowledgeable tech to have a look at the unit not one who just guesses and replaces parts. There is too much that could be an issue for me to diagnose it over the internet. I wish I could be more help.
i have a heat pump too. when you have it on heat and cold air comes out, i was told by a heating contractor, 'sure, if you have it set to 65 and you feel that the air is cool, IT IS. your body is 98.6 degrees and 65 probably DOES feel cool. (this kinda makes sense. i put a little room thermometer over there and 65 degrees sure does feel cool.) 76 -77, yeah. that feels warm. I dont see any problem here once it was laid out by the heating contractor. what do you mean the ac froze up? do you mean it stopped working or do you mean you saw condensation that looked frozen or what? heat pumps are a whole different type of animal......
