First time furnace repair. Any advice?

kenmac · 04-06-2009, 10:48 PM

If you have a V M you could check for 110 v at the red terminal on the board on a call for heat..Red from V M to red wire terminal.. black lead from V M to ground or white.. If you have 110 v the fan should run

hvaclover · 04-06-2009, 11:16 PM

Quote:

Originally Posted by hychesee

that's hilarious, thanks - grins back at ya

Contact the mfg of any HVAC brand. They'll confirm what I told you.

Controls are not rebuilt for a darn good reason. When a new furnace model is safety certified it is with the components that the mfg hast designed in to it.

Any field alterations would be considered a deviation (that means repairing a board or any other part of the safety or ignition system) from the original design and puts the liability squarely on the shoulder of the offending individual.

There was a guy around here who was repairing Bryant blower boards some years ago for local wholesaler. UTS shut 'em down hard. And rightfully so.

The solid state components were generic and not the same quality the OEM put into to the board. There were a few cases of gas valves not closing on the end of a cycle.
I ran those calls and they were the repaired boards I mentioned.

kenmac · 04-07-2009, 07:52 AM

Quote:

Originally Posted by hvaclover

Contact the mfg of any HVAC brand. They'll confirm what I told you.

Controls are not rebuilt for a darn good reason. When a new furnace model is safety certified it is with the components that the mfg hast designed in to it.

Any field alterations would be considered a deviation (that means repairing a board or any other part of the safety or ignition system) from the original design and puts the liability squarely on the shoulder of the offending individual.

There was a guy around here who was repairing Bryant blower boards some years ago for local wholesaler. UTS shut 'em down hard. And rightfully so.

The solid state components were generic and not the same quality the OEM put into to the board. There were a few cases of gas valves not closing on the end of a cycle.
I ran those calls and they were the repaired boards I mentioned.

I agree... Wouldn't buy parts off E-Bay either

hvaclover · 04-07-2009, 08:53 AM

Quote:

Originally Posted by kenmac

I agree... Wouldn't buy parts off E-Bay either

Glad we agree. Ebay is not the place to buy a part. Whose gonna back up the warranty?

yuri · 04-07-2009, 10:25 AM

The other issue no one seems to understand or care about is that a circuit board is a critical safety device. If you mess it up and the flame sensor/flame failure part of it quits you can fill up the furnace/house with gas and voila, first person to turn on a light switch blows up the house. Nothing against some DIY repairs but fixing circuit boards is verboten.

klas · 04-11-2009, 07:01 PM

Update, got the new control board, it was a breeze to replace. Turned the system on and the fan started just fine. Now, another problem is with the burner, the gas burner turns on for a few seconds and then shuts off. Is this a symptom of a bad pressure switch?

kenmac · 04-11-2009, 07:03 PM

sounds like flame sensor.. Clean it or make sure it has good connection on the new board

klas · 04-11-2009, 07:31 PM

Quote:

Originally Posted by kenmac

sounds like flame sensor.. Clean it or make sure it has good connection on the new board

can you tell me where is it located?

kenmac · 04-11-2009, 07:35 PM

it will be a steel rod that the burner flame burns against as the flame shoots into the chamber.. It's around the burner

hvaclover · 04-11-2009, 07:38 PM

Right here

klas · 04-11-2009, 07:47 PM

Got it! Thanks! Cleaning it now

klas · 04-11-2009, 07:55 PM

Cleaned with sand paper... still no go... system cycles on/off. Anything else?

klas · 04-11-2009, 08:02 PM

btw, check out the back of my old control board

klas · 04-11-2009, 08:19 PM

cleaned it a little more... no change

should i order a pressure switch now?

klas · 04-11-2009, 08:29 PM

I checked the code with 5 blinks... "Flame sensed when no flame should be present" Maybe that will give some ideas?

04-06-2009, 10:48 PM	#16
kenmac HVAC / Plumbing Join Date: Feb 2009 Posts: 1,801	First time furnace repair. Any advice? If you have a V M you could check for 110 v at the red terminal on the board on a call for heat..Red from V M to red wire terminal.. black lead from V M to ground or white.. If you have 110 v the fan should run

04-07-2009, 10:25 AM	#20
yuri Hvac Pro Join Date: Nov 2008 Location: Winnipeg, Canada Posts: 6,737	First time furnace repair. Any advice? The other issue no one seems to understand or care about is that a circuit board is a critical safety device. If you mess it up and the flame sensor/flame failure part of it quits you can fill up the furnace/house with gas and voila, first person to turn on a light switch blows up the house. Nothing against some DIY repairs but fixing circuit boards is verboten.

04-11-2009, 07:01 PM	#21
klas Member Join Date: Apr 2009 Posts: 30	First time furnace repair. Any advice? Update, got the new control board, it was a breeze to replace. Turned the system on and the fan started just fine. Now, another problem is with the burner, the gas burner turns on for a few seconds and then shuts off. Is this a symptom of a bad pressure switch?

04-11-2009, 07:03 PM	#22
kenmac HVAC / Plumbing Join Date: Feb 2009 Posts: 1,801	First time furnace repair. Any advice? sounds like flame sensor.. Clean it or make sure it has good connection on the new board

04-11-2009, 07:35 PM	#24
kenmac HVAC / Plumbing Join Date: Feb 2009 Posts: 1,801	First time furnace repair. Any advice? it will be a steel rod that the burner flame burns against as the flame shoots into the chamber.. It's around the burner

First time furnace repair. Any advice?