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Payne 394 upflow furnace


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8 replies to this topic

#1 ridodami4

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Posted 28 July 2011 - 05:08 PM

HELP my air conditioner is out , when I start the unit I can hear the click for the motor but it doesnt start I need troubleshooting help Thanks the blower motor

Edited by ridodami4, 28 July 2011 - 05:09 PM.


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#2 Dan Webster

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Posted 28 July 2011 - 05:20 PM

Reach in there and turn the motor, does it turn free?. Check the capacitor for signs of swelling and leakage.
The relay might be clicking but not making contacts inside. A furnace uses low speed to operate the heat and is always wired to run on low. When air condition is called for the relay clicks and switches from low speed to high speed for cooling. Might be the contacts in there are fried.

Post some photos of your blower and the controls for a more precise answer. Let us see what you have if you can.

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#3 ridodami4

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Posted 28 July 2011 - 05:31 PM

Thanks for the quick response, I love this site!
The motor spins freely and wht I think is the capacitor looks really ugly unit is about 20 yrs old and 2 years ago I replaced the circuit board as soon as the wife gets home I will post some photos

Edited by ridodami4, 28 July 2011 - 05:33 PM.


#4 ridodami4

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Posted 28 July 2011 - 05:54 PM

Posted Image
Posted Image

#5 RegUS_PatOff

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Posted 28 July 2011 - 07:11 PM


Capacitor may look like this :

Posted Image
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#6 ACtechGUY

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Posted 29 July 2011 - 07:04 AM

Here is a test to see if the motor is bad .
turn off power to unit
At the circiut board find and remove the PR-1 wire. move it out the way.

Find the black wire marked HI on the board . remove HI wire and place on PR-1 terminal.

You are now directly powering the fan motor(bypassing the circuit board) to test the motor .
Put cover back on blower and turn on power to heater. The motor will run now if it is ok.

If the motor runs replace the circuit board.

If the motor does not run replace the motor and capacitor.

Edited by ACtechGUY, 29 July 2011 - 07:48 AM.


#7 ridodami4

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Posted 29 July 2011 - 10:31 AM

I ran the test ancd the motor runs, but not at full speed for air. Is the pic I posted the capacitor or the contactor and could this be the problem. if not capacitor where is it?

#8 ACtechGUY

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Posted 29 July 2011 - 02:54 PM

If the motor runs by bypassing the control board , the problem is the control board . take loose the control board and look at the back of the board behind those small black boxes . you will likely see a burn mark. Regardless of wheather or not you see anything the board will have to be replaced .

It is often the case when a motor is failing it will draw alot more amperage than the relay contacts are rated for and burn out the board.

It is very possible to have a failed / failing motor and a burnt control board.



#9 ridodami4

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Posted 02 August 2011 - 08:29 PM

SUCCESS!!!!! Replaced the capacitor, no luck . Pulled the blower motor and it was bad, replaced it today and the wife is smiling again!
Total cost $198.99. thank you all for your responses, Ridodami4


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