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mshel
Dec 1, 2007, 07:13 AM
I have a 12 year old unit which has recently had the heat exchanger replaced and a new thermostat installed. The blower will work for a few minutes when the heat cycle starts and then shuts off. I thought it might be the heat sensor on the blower and so I temporarly disconnected the sensor. I turned the power back on and the blower came on but again it ran for a few minutes and then shut off. I really hate to continue to put money in this unit but I can't afford a new unit. So, I need some help in diagonosing the problem.

Help me, it's starting to get cold

MIke
hvac1000
Dec 1, 2007, 07:57 AM
Sounds like it could be the motor causing the problem. Probably going out on overload. Next time it happens you will need to take a electrical reading to see if voltage is still going to the motor when it stops running.
mshel
Dec 1, 2007, 04:38 PM
Sounds like it could be the motor causing the problem. Probably going out on overload. Next time it happens you will need to take a electrical reading to see if voltage is still going to the motor when it stops running.


Thanks for the reply, I will take a reading tomorrow when I power it up again.

Mike