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Posted by Steve on November 24, 2007, 7:34 pm
My problem has a few minor complicating factors. First, I have a dual
fuel heat pump. Several years ago, an HVAC tech told me that the
compressor could no longer be used for heating purposes and I would
have to switch over to the emergency heat setting which uses the gas
furnace exclusively. Last summer, I replaced the blower motor and all
was well until this fall when we turned on the heat and had none. I
noticed that the furnace is coming on for about a minute and then
shuts off. Apparently it is shutting off so as not to overheat since
the blower is not responding. My system has some very complicated
looking controls between the thermostat and the HVAC and I'm thinking
maybe just replacing the whole mess with a simple traditional
thermostat since the heat pump is no longer functioning. In the mean
while, does anyone have any idea of what may be the problem or where
to look. The new fan is a two speed where the original was not and I
connected the wire that causes the fan to run in the high speed mode.
I am reasonably knowledgeable with regards to things electrical and
mechanical and want to fix the thing myself if possible.
Thanks for any input you may have.
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