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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My furnance runs ok only the blower only runs short time

Customer Question

my furnance runs ok only the blower only runs for a short time then shuts off and then back on. it won't continue to run through the heating cycle. worked ok with the AC all nsummer
summer
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.

Hello and thanks for using this service, if you have been waiting do not worry or get upset I am just one of the techs on here and I try to get to as many customers as I can and I just picked up your question now. Please give me time to respond as typing, researching and adding links takes me time to do so please be patient and often I will ask you questions to narrow down the issue to get is diagnosed correctly.

What make and model unit do you have and do you have an ECM blower motor?

Customer: replied 1 year ago.
It is an older Tempstar unit
Model # *****###-##-####
It has a pilot light and it is the blower motor.
Customer: replied 1 year ago.
If EMC blower is for clearing the chimney before lighting then No
Expert:  HVAC Guru replied 1 year ago.

Ok have you checked to see if the capacitor for the blower motor is bad? Does ti sound like the blower struggles to get going?

Customer: replied 1 year ago.
Sounds like the blower starts fine, is there a temperature that the blower runs off of? when they installed it years ago they had to put and extra register in because the blower wasn't running right. it's been fine for years nothing has changed.
Customer: replied 1 year ago.
could it be thermostat, it's original also.
Customer: replied 1 year ago.
in cooling mode it ran fine all summer
Expert:  HVAC Guru replied 1 year ago.

Can you see the wiring diagram on the panel? If so can you take a picture of it and upload it here?