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.