Question about Heating & Cooling
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Posted on Jan 02, 2017
SOURCE: will not shut off
Sounds like a stuck relay on the unit itself. Maybe there is a short in the control wire that comes from the thermostat that activates the fan.
The thermostat probably has one hot wire at all times. The thermostat then chooses which wire to send the voltage down based on your selection. One of those wires is probably for the fan only. Make sure that it is in good condition (no bare, pinched or wires)
Posted on Jun 17, 2008
Had one doing similar recently, and after a thunder & lightning storm. Nothing worked, but kept blowing 2 amp fuse in thermostat, when anything tried, heat or cool. Pulled plastic control box down from inside upper unit (AC) made sure breaker was off, took of plastic cover and smelled inside, and could smell burnt plastic smell. Replaced, control box, that got fan only working. Tried another thermostat , everything worked as it should. Turns out the lightning, or power surge, or whatever, shorted out the thermostat, and control box at same time.
Posted on Aug 14, 2008
SOURCE: analog thermo.stat control kit
Have you tried removing the RH wire connected to the thermostat and try it ? This might rule out furnace as short in system. If it does the same, put RH- (heat) back on and try removing RC-(cool) , if it doesn't pop the fuse, you may have isolated the problem.?
Posted on Aug 23, 2008
SOURCE: Blower fan runs continually.
your sensor to the fan is stuck in the closed position. This sensor kicks the fan on when a certain temp is reached in the heat chamber. It opens after cool down and apparently is stuck closed.
Posted on Jan 23, 2009
You can find what the error code is by looking on the inside of the bloewr panel. If it is still there after all these years there is a code list right around the wiring diagram. If my memory serves me correctly it is a limit problem. But be for sure and check the code sheet.
Posted on Feb 16, 2009
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