Inducer Motor Cycles On and Off


  #1  
Old 11-12-20, 08:34 PM
J
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Inducer Motor Cycles On and Off

The furnace will fire up normally with no problems when the thermostat calls for heat. When the desired temperature is reached and the furnace shuts off. The inducer motor will then continuously cycle on and off until there is a call for heat again. Once there is a call for heat again, the furnace will start up without a problem. The problem only seems to occur when the desired thermostat temperature is reached. Any ideas?
 
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Old 11-12-20, 08:57 PM
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Welcome to the forums.

That is a typical problem with a power stealing thermostat like a nest.
What thermostat are you using ?

If you know how to pull your thermostat off the base.... do that and see if the inducer shuts down.
 
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Old 11-17-20, 07:00 PM
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Thank you PJ. I have attached some images of the thermostat below. I did pull off the thermostat from the mounting plate when the inducer motor was cycling on and off and it stopped immediately. As soon as I remounted the thermostat face plate it started cycling again. I can try switching out the thermostat if you believe that is the issue.





 
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Old 11-17-20, 07:13 PM
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Have you changed the batteries ?
If you have.... it may be time for a new thermostat.
 
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Old 11-18-20, 03:55 AM
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I believe they are newer but I will swap them out for new ones. If that doesn’t work, I have an extra thermostat I can try.
 
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Old 11-19-20, 07:18 PM
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Switched out the thermostat. Seems to be working fine now. Thank you.
 
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Old 11-19-20, 07:23 PM
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Your welcome. Thanks for letting us know how you made out.
 
 

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