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My Carrier 58PAV090-16 HVAC didn't work, and I smelled

Customer Question
My Carrier 58PAV090-16 HVAC...

My Carrier 58PAV090-16 HVAC didn't work, and I smelled something like electrical burning.

Contractor's Assistant: Are you an HVAC professional?

Forget to say Hi Pearl. No, a handyman.

Contractor's Assistant: Do you plan on doing the work yourself?

Try it first, if not, call for a HVAC technician. I know how to change breakers and recepticles and identify wire problems.

Contractor's Assistant: Anything else we should know to help you best?

In fact, I heard the finance sounds a bit louder yesterday, but didn't mind that much. This morning, I felt some electrical burning odor, and the HVAC didn't work anymore. I can only hear something like try to start but failed to start. No flame from the burner.

Submitted: 7 months ago.Category: HVAC
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Answered in 1 minute by:
12/18/2017
HVAC Technician: HVAC Guru, HVAC TECH replied 7 months ago
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 18,713
Experience: 20yrs in the HVAC industry with certificates and degrees.
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HVAC Technician: HVAC Guru, HVAC TECH replied 7 months ago

OK does the main blowetr come on when you set the thermostat to FAN ON?

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Customer reply replied 7 months ago
What is the main blower? The inside one or the outdoor one?
HVAC Technician: HVAC Guru, HVAC TECH replied 7 months ago

The inside one.

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Customer reply replied 7 months ago
The inside one did not turn on because I did not hear the sound.
Customer reply replied 7 months ago
Neither the blower nor the igniter works. Only a sound that seems can't start.
HVAC Technician: HVAC Guru, HVAC TECH replied 7 months ago

OK that is likely the motor trying to start, but can not do to a bad winding or bad capacitor. I would not run it any further as you could really burn something up. It would be hard to say exactly what the cause is as a number of things could cause that issue. Are you trying to fix it yourself?

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Customer reply replied 7 months ago
Let me try to take a look at the breaker, as I found that the wires to the HVAC were abnormal - no electricity. Please allow me to check the service panel.
HVAC Technician: HVAC Guru, HVAC TECH replied 7 months ago

Yes that is fine a low voltage condition can cause that issue as well.

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Customer reply replied 7 months ago
After some careful examination this morning, I found that the three breakers have no problem - a 20 or 15A to the furnace and two 40, totally 80A, breaks both work well. I detached the cover of the furnace, and cleaned the dusk and tighten lots of plugs, then I found that the furnace can work for a while - gas burns and the main blower works - but stopped working a few minutes later if I set the HVAC controller to Emergency. If I set the controller to normal Heat, neither the internal furnace and external unit works. Now I am wondering whether the external unit failed after 12 years good working. It is an American Standard unit.
HVAC Technician: HVAC Guru, HVAC TECH replied 7 months ago

Yes it may have failed based on what you are saying, they last about 10-15 years tops most times. Since you had an electrical burning smell I would get it checked out on site of course as this would be hard for me to say 100% what the exact issue is, but it sure sounds like a failure on the outside unit, wiring or blower issue or capacitor issue.

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