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eweneek1 02-13-2012 09:38 PM

Payne Heater Problem
 
Have a 15 year old Payne forced air heater, model 373 LAU 048115. So far, to keep it running two years ago I replaced the circuit board and last year the inducer motor. Problem today. Fan comes on, then inducer motor, but igniter will not glow. Receive error code 31. Tried the test mode and everything works fine including the igniter.

Have inspected the complete exhaust vent and there are no obstructions. It seems the vacuum switch is good, but the inducer motor is not pulling any vacuum. The inducer motor and vacuum switch seem to work fine. All the seals look good. Don't know what else to do.

ben's plumbing 02-13-2012 09:45 PM

you say inducer motor is not pulling a vacuum.... check small tube for obstruction that hose connects too clean out with small wire and connect magnaheily gauge and recheck for vacuum..... if your not getting vacuum thats your problem..

eweneek1 02-13-2012 09:57 PM

Payne Heater problem
 
Did as you suggested and checked the tube and there seems to be no blockage. Wire went in a full 2 inches.

ben's plumbing 02-13-2012 10:04 PM

Quote:

Originally Posted by eweneek1 (Post 852954)
Did as you suggested and checked the tube and there seems to be no blockage. Wire went in a full 2 inches.

you sure no vacuum..then its has to be wheel inside inducer bad......

beenthere 02-14-2012 04:40 AM

Sounds like a drain problem, clean drain lines and trap. Also check exhaust pipe for obstruction.

eweneek1 02-15-2012 07:21 PM

Payne Heater Problem
 
Finally got under the house to do some more checking on the vacuum switch. Bypassed the switch, turned heater on, and the vacuum switch did not open. Removed inducer motor, only one year old, and interior and exterior fans both work. Just don't know if they are turning at full speed. Tried to rent a magnaheily gauge to test, but was unable to find one. Filled 3/16 plastic tubing with colored water and started heater. When inducer came on, the water column only moved 1/2". Checked the complete vent system from the inducer out and no obstructions. Don't know what else to check at this point.

how 02-16-2012 01:37 AM

Some stray questions as I head off to bed.
Make sure the ID assy is properly sealed where it is attached to the furnace. Is there a capaciter on that ID motor?
What is the WC threshold listed on the pressure switch?
When the water in your manometer moved 1/2 inch, was that a 1/2 " total or 1/2 inch on each side?
If your furnace is a high efficiency then the air intake must also be inspected.

beenthere 02-16-2012 03:51 AM

Did you clean out the trap.

eweneek1 02-16-2012 04:37 PM

Payne Heater Problems
 
The ID assembly, model is properly sealed where it is attached to the furnace.

There is no capaciter on the ID motor.

Can not find the WC threshold listed on the pressure switch. The only numbers are FS6675-1320 and HK06WC076.

The water in the manometer moved 1/2 inch on each side.

The furnace is mount horizontal under the house and I do not see a drain or trap.

The furnace is a fan assist draft 80+ furnace about 15 years old.

how 02-16-2012 07:35 PM

A 1/2 " drop on each side of the tube is a 1" WC measurement which is not that unusual for an ID assy.
Did you look on the back side of the switch for a WC listing?

eweneek1 02-16-2012 10:41 PM

Payne Heater Problems
 
Can not find the WC rating on the pressure switch label. The only other numbers on the switch are 015917 / 2792.

how 02-16-2012 11:35 PM

I guess Payne is living up to it's name again. Some manufacturers are secretive about divulging info that might result in diagnosis as opposed to part replacements.
All I found was a listing saying that the current part number for that pressure switch is HK06WC090 but without any helpful details like WC info.

hvac5646 02-17-2012 08:34 AM

Quote:

Originally Posted by how (Post 855538)
I guess Payne is living up to it's name again. Some manufacturers are secretive about divulging info that might result in diagnosis as opposed to part replacements.
All I found was a listing saying that the current part number for that pressure switch is HK06WC090 but without any helpful details like WC info.

Closes at 1/8" WC ....opens at .28" WC.

how 02-17-2012 11:08 AM

What Hvac5646's WC info would normally mean (considering your 1" manometer measurement of the ID assy) is to change the pressure switch.
BUT....
I am a little confused however why Payne would pair a pressure switch with an ID assy with that level of pressure disparity.
If Hvac5646 's info is correct, then it makes me wonder if your ID WC measurement is actually stronger than it should be.
It makes me wonder about the ID that you changed last year?

hvac5646 02-17-2012 12:14 PM

Quote:

Originally Posted by how (Post 855762)
What Hvac5646's WC info would normally mean (considering your 1" manometer measurement of the ID assy) is to change the pressure switch.
BUT....
I am a little confused however why Payne would pair a pressure switch with an ID assy with that level of pressure disparity.
If Hvac5646 's info is correct, then it makes me wonder if your ID WC measurement is actually stronger than it should be.
It makes me wonder about the ID that you changed last year?

right from the book and verified by the wholesaler:wink:


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