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Blower motor malfunction

I have a Goodman A24-10 stat in the off position, blower runs continously. switch the stat to cool or heat blower cuts off. Switch from auto to on fan shuts off.

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Possible bad stat

Posted on Dec 05, 2012

  • Wayne Miller Dec 05, 2012

    I have already changed the stat. Same problem, heat and cool off, fan switch on auto. Fan runs as soon as I turn on the breaker. If I turn the fan switch to on the blower stops. Yes the stat is wired right.

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Posted on Jan 02, 2017

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SOURCE: I have a goodman a49-20 I cannot get the blower

The motor coil has gone bad. You have rewind the motor coil. Or you have to purchase a new motor.

But, check if you are under Warrantee. If so do not try to repair it yourself. Warrantee will void. Contact the service center or help line.

Posted on Mar 21, 2011

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The fan in the airhandler wont shut off.


The fan is controlled by a blower timer board located inside the air handler, or on older units it has a relay called (of all things) a blower relay. If these items were at fault I doubt removing the thermostat would cause the blower to go off. if bad causing this problem the blower would continue to run even with thermostat removed.

But it is also controlled by the thermostat.

You mentioned that if you remove the thermostat it cuts off. There are 2 switches on most thermostats.
1 has Cool, Off, Heat, and Emergency Heat (on a heat pump stat)
2 The other switch has On and auto (it is for the fan motor only)

I believe because it stops when you remove the thermostat that the switch on the fan is set to on possibly. It should be on auto-matic. This way the fan motor only come on with cooling or heating. If in the on it stays on all the time. If this is the case just switch to AUTO.

Or the thermostat may be wired wrong. The G terminal is where the fan motor gets instructions from the thermostat. Make sure its on G at the stat and the correct wire at the blower coil is being used for the corresponding wire going from the stat to the blower for G. Don't confues G for green it could be any color. The terminals are not for color but it makes more sence to make them color - letter identified. On the other end soemtimes the wires are not colored the same so look carefully.

Also a whisker of a thermostat wire could be touching inside the thermostat and causeing the motor to run 100%. Look carefully at this and see if it has too long of thermostat wires stickinhg on out under the screws to where they may tough other things.

If neither things stop or show the problem and it deffinately stops when thermostat is removed the thermostat is most likely bad.

If this helps you 1 way to make the repairs your\self or helps you realize you need a technician please rate mne as high as you can.

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