Hi, all. I hope you can help me, as I'm at my wit's end (much to your
surprise, I'm sure).
Here's the situation: I have a Heil heat pump and a Honeywell RTH7000
programmable thermostat. My problem is that when the heat pump shuts
off, the fan continues to run. (I mean the indoor fan that circulates
the air. Maybe also called the blower?) It will continue to run until
the heat pump comes on again and then shut down with the heat pump.
Maybe. Often times the fan just continues to run until I shut it off
using the circuit breaker. Rarely, the fan will shut down after the
initial heat pump run.
The problem started when I replaced my old thermostat with this one.
But according to Honeywell's people, since I can take the thermostat
off the wall (thus severing its connection to the house) and the fan
continues to run, it's not the thermostat that's causing the fan to
I have checked to make sure the fan switch is set to Auto and not to
Any suggestions or information would be helpful. If you need more
information, please do not hesitate to ask. I'll do whatever I can to
tell you more.
Either you bought the wrong thermostat, it's defective or you wired it
A correct thermostat will energize the AH fan during all heating or
cooling events only. I believe it's G but double check the schematics
in the thermostats manual..
If the problem is not constant then it is not likely to be incorrect
wiring of your thermostat. Many air handlers (the inside half of your
system) will continue to run the fan for a little while after what ever
is supplying the heat has stopped running. In your case the outside
half of the heat pump. This distributes any residual heat. I would
suspect that the controls that do that are not working properly in
yours. At this point you probably need to get a service tech to take a
look at it.
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