Question about Heating & Cooling
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Posted on Jan 02, 2017
If you do not have a fan board you have a fan limit switch. That brings the fan on about 120 and off at 90. It is located in the middle of your heat exchanger. Check across with voltmeter when you turn it on. If you have voltage after it runs for a while its bad. Or just jumper across it and see if afan comes on. They just go bad. Pick one up at HVAC supply house or you can order on line. If you have an electronic thermostat. On the back it has a switch that says gas or el switch to electric and the fan will come on with furnace. Rus but you still need to change fan limit this will just get you thru till you get it.
Posted on Nov 28, 2009
Chances are you need to replace both the condenser and furnace, then you you should get a varaible speed blower with the new furnace, get at least a 90% gas system with a 16 SEER condenser, save on energy cost as soon as it's installed. Go Get IT
Posted on Feb 01, 2010
SOURCE: trane weathertron thermosatat
OK. Here is a Trane Weathertron BAYSTAT240 thermostat wiring picture. This heat pump w/ electric (emergency) heaters is running right now. Notice the G terminal has green wire, the R terminal has red wire, the white wire is jumpered from W to X2, etc. The black wire loop you see in the center hole is unconnected.
This unit is adjusted by leveling the base - loosen the screw to the left of "R" and the one to the right of "F". Twist the base clockwise to RAISE the indicator. This makes the mercury in the switch turn ON at a different temperature. Remember to tighten those 2 screws again.
You will have to experiment several times to make the unit read exactly right. If the tech installed the base exactly level, the unit would read right (it says here).
Posted on Jun 10, 2011
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