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-   -   Carrier ICM271C control board fails after 1 season (http://www.diychatroom.com/f17/carrier-icm271c-control-board-fails-after-1-season-176142/)

Britcarfxr 04-02-2013 09:59 PM

Carrier ICM271C control board fails after 1 season
 
I have a Carrier model 58DR075 furnace and every year I have to replace the fan control board. When I install a new one it works fine but eventually it gets to the point where when the fan comes on the flame goes out. The unit will try to restart but as long as the blower is running the flame will not stay lit. Once I replace the blower control the unit is fine for about 1 year then the same failure happens again. This has been going on for 7 years now. Any ideas as to why this is happening and how it can be resolved? Thanks from a newb!:)

ben's plumbing 04-02-2013 10:03 PM

are there any error codes on control board pointing to some direction to go and picture of furnace with doors off will help along with close up of control board..ben sr

Britcarfxr 04-03-2013 08:59 PM

Carrier fan control failure
 
2 Attachment(s)
I don't see a way to get error codes from this board. There is not LED or test port on it. Even with a new control board there seems to be an issue getting the flame to stay lit. Once the thermo calls for heat the igniter will strike for quite awhile before the pilot lights then the gas valve will open and the flame lights only to go out in a few seconds. Then the same process starts all over again. Then finally it will stay lit and the furnace works normally. I am using an ICM271C control board btw. Here are the pictures. Thanks!

old_squid 04-03-2013 10:26 PM

Quote:

Originally Posted by Britcarfxr (Post 1151883)
I don't see a way to get error codes from this board. There is not LED or test port on it. Even with a new control board there seems to be an issue getting the flame to stay lit. Once the thermo calls for heat the igniter will strike for quite awhile before the pilot lights then the gas valve will open and the flame lights only to go out in a few seconds. Then the same process starts all over again. Then finally it will stay lit and the furnace works normally. I am using an ICM271C control board btw. Here are the pictures. Thanks!

I don't know why, but the function of changing the fan control board is somehow making the pilot assembly work right for awhile. The control board has nothing to do with pilot other than supplying low voltage power to the components that light the pilot. The pilot assembly itself is what proves the pilot being lit and allowing the furnace to transition to main burner.

First of all the pilot should light within the first few sparks. Once lit is should be a nice blue well defined flame. I suspect the real problem is with the pilot assembly. The other thing you mentioned is that as soon as the blower comes on the pilot/flame goes out. This is NOT a good indicator. It can indicate a failed heat exchanger.

I suggest you have a qualified Carrier service tech take a look at the furnace.

Britcarfxr 04-03-2013 11:28 PM

Carrier fan control failure
 
I did have a qualified Carrier tech check it out. He is the one who first changed the control board. I forgot to mention that over the years we have lived here I have replaced the pilot (which does have a nice blue flame) and the pilot controller. Both of those items failed at different times but nothing has resolved the problem completely.

how 04-04-2013 01:21 AM

The major excuse most board manufactures claim for repeated failures is poor grounds. I've certainly sorted out instals with repeated board failures by fixing poor grounds anywhere between the board, all the way back to the main house ground.


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