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Ask Airheatman Your Own Question
Airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 7538
Experience:  Furnace, A/C and heat pump specialist.
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Trying to figure out why my fan won't turn on on an American

Customer Question

Hi Pearl, trying to figure out why my fan won't turn on on an American standard freedom 95
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: A day or so
JA: Do you plan on doing the work yourself?
Customer: Well, I don't mind if I can that's for sure
JA: Anything else we should know to help you best?
Customer: Nope
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the HVAC Technician about your situation and then connect you two.
Submitted: 4 months ago.
Category: HVAC
Expert:  Airheatman replied 4 months ago.

1. Will fan come on in any mode? Heat cool or Fan ON?

2.Do you have a multimeter for troubleshooting?

Customer: replied 4 months ago.
I have the AC off and the fan on and nothing works so far
Customer: replied 4 months ago.
I gave a multimeter somewhere
Customer: replied 4 months ago.
Expert:  Airheatman replied 4 months ago.

OK Does furnace do anything? Will heat come on?

Customer: replied 4 months ago.
I didn't try that, it's 95 out lol
Customer: replied 4 months ago.
Want me to give that a shot? I have my multimeter
Expert:  Airheatman replied 4 months ago.

Just trying to verify if we have power to furnace.Does outdoor unit come on when you call for ac?

Customer: replied 4 months ago.
but then it turns off after a few minutes. I can see frost on the lines too when it is running.
Expert:  Airheatman replied 4 months ago.

OK sounds like we have power.Most likely a bad fan or bad capacitor. Lets go to furnace ,remove both panels and give me model on furnace.It will be

inside furnace in burner compartment so I can provide guidance with this specific unit.Model will be on a label just above burners on right or left inside panel

Customer: replied 4 months ago.
Would it be on the outside unit or inside?
Customer: replied 4 months ago.
The inside has unit has only a wiring diagram
Expert:  Airheatman replied 4 months ago.

Inside above burners on inside panel.See picture I sent

Customer: replied 4 months ago.
Expert:  Airheatman replied 4 months ago.

That is evaporator on top of furnace.Furnace model will be inside burner compartment

Customer: replied 4 months ago.
Ok, will have to take that apart it appears
Expert:  Airheatman replied 4 months ago.

Standing by. I need model to determine what type of motor you have. That wiring diagram should help.

Customer: replied 4 months ago.
Expert:  Airheatman replied 4 months ago.

OK the V in model probably means we have a variable speed motor with no capacitor. Look at blower and tell me if it has a capacitor or if motor has a bell on end with 2 separate plugs.

Customer: replied 4 months ago.
Definitely two separate plugs
Expert:  Airheatman replied 4 months ago.

Your furnace has what is called a variable speed motor which requires a special tool for testing.

The problem is going to be one of two things. One could be the control board is not sending signal to motor and the other which is most common is a defective controller on the motor.

The tool for testing costs about 100 bucks. You can see it at link below:

If you have the tool or wish to obtain it, I will be happy to assist you in detemining if issue is with control board or motor.

If this is something you want to troubleshoot and have or can obtain the test tool,let me know.Otherwise you will need an onsite tech to troubleshoot to determine if issue is motor controller or board.

Customer: replied 4 months ago.
Doesn't look like I can fix it myself then. Thanks for the help!
Expert:  Airheatman replied 4 months ago.

I understand. Below is a link to how to troubleshoot if you can get the tester .

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