Question about Heating & Cooling
The above question was an add on to another question I posted yesterday..
If the furnace is more than ten years old and it has an oilable motor, it could only need a few drops of light weight oil. Usually, the bronze bushings utilized in blower motors wear a bit over time and cause excessive 'end play' in the motor armature which causes excess 'drag' causing them to have a problem initiating rotation.
Other times, a bad run capacitor COULD be the problem. On a fractional horsepower blower it could be as low as 3 mfd, 5 mfd or possibly as high as 7.5 mfd. Slim chance because it for a bad capacitor to cause your condition it has to have lost some of its capacitance and this happens only RARELY. T
Try looking for little yellow plastic or grey pot metal plug on the motor end where the wires come out. If you are lucky there will be two plugs, one for each end of the motor. The one typically that goes bad is the mostly inaccessible inner bearing that holds the weight of the squirrel cage blower wheel. Hopefully that bearing has an extension tube connected to it and is accessed next to the outer bearing oil port.
Also a great percentage of motors are lubricated for life and have no oil ports in which case the motor needs to be replaced.
Posted on Nov 25, 2014
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Posted on Jan 02, 2017
first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps
Posted on Jan 20, 2009
i need help rplce thrmostat with a digital braueburn my furnance wont turn on no flashing lights cant reset the burner though has power what do i do shoul i reset the circut breaker that was never tripped though
Posted on Jan 26, 2009
NO BECAUSE THE BOARD IS TELLING THE FANS TO STARTARE THE CONTACTS FUSED TOGETHER OR STUCK IN THE CLOSED POSISTION CHECK THIS FIRST
Posted on Aug 10, 2009
sounds like the circuit running to your condenser powers your furnace. when u disconnect power to the furnace it will reset and run the blower on startup. check the tube connecting the vacuum switch to the induced draft motor. maybe a leak. good luck
Posted on Nov 24, 2009
Need your model # to check the codes but, this coming back on after turning the t-stat off is rare. You may have been in a lockout and the furnace re-started. Some furnaces try to start three times , then lock out. Time out, then re-start. The codes should be on your furnace blower door. Write back with this info and i could help.
Posted on Oct 13, 2011
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