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Old 02-12-2008, 07:19 PM   #1
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Help finding Control board for furnace


Late last night I noticed the fan on my furnace would not stop running. I can turn down the desired temp below room temp and I can still hear the fan constantly going. It's been close to 20 hours straight now.

Before calling the heating company, I changed thermostats but the issue persisted. The only way the fan will turn off is when turning off the power breaker to the furnace. Once I flip it back on, the fan starts again right away.

The heating company sent a younger kid over. Didn't seem too sure of himself, but after talking to his boss on the phone they feel the issue is the control board on the furnace. They took the model info down and called a few hours later saying they have no info whatsoever on this type of furnace. They said they went through all their books and can't find the part anywhere. They asked me to go to the condo assoc. and ask, but they know nothing (ofcourse).

#1. Does it sound accurate this is a control board problem?

#2. My furnace is by Consolidated industries
Model # MBA040NH2R

Where can I find this control board if my local heating company can't?

I dug around a little online and found it may be under one of these names...

Quatro
Tech-4
QuadPro
MultiFlow
Brentwood
Sunburst

I checked and the manual was not passed to me when I bought this place. I checked a few neighbors and they don't have the manuals either. My place is approx. 10-12 years old

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Last edited by MoggSquad; 02-12-2008 at 07:20 PM. Reason: error in subject field
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Old 02-12-2008, 08:49 PM   #2
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Help finding Control board for furnace


Is it a PC Board or a Module type control. Someone correct me if I am wrong but If I recall correctly, consolidated is belly up.

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Old 02-12-2008, 09:17 PM   #3
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Help finding Control board for furnace


No idea on which board. All I was told is it's a control board.

I'm going to call around in the morning. Hope I can find something somewhere.

Thanks for chiming in though.

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Originally Posted by Buckeyetech View Post
Is it a PC Board or a Module type control. Someone correct me if I am wrong but If I recall correctly, consolidated is belly up.
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Old 02-12-2008, 09:26 PM   #4
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Help finding Control board for furnace


You are right, looks like they went out of business. bankruptcy was in 2004.
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Old 02-12-2008, 09:36 PM   #5
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Help finding Control board for furnace


http://www.myhvacparts.com/Catalogue...an%20Timer.htm

I found something that may be just what I needed...
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Old 02-13-2008, 01:24 PM   #6
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Help finding Control board for furnace


it could be a relay switch that controls the blower on the board that is stuck in the on position

just tapping it with the insulated part of a screwdriver might fix it temporarily

someone with electronics background could test the relay and replace it

there are probably several relays on that board but an electronics guy could trace the one that controls the blower


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Old 02-13-2008, 04:36 PM   #7
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Help finding Control board for furnace


I'm glad you stressed "TEMPORARY" Chances are he'll be going down all the time and getting it started. Also the liability of replacing an enclosed relay on th PC board will end up getting someone sued. . . . . after property damage.....I've seen it happen once. It's not pretty. If you can't get a replacement board a GOOD technician can probably make a very similar board work. I've seen that VERY often. The reason for going with PC boards is to eliminate relays and contactors fastened all over the furnace. I'd replace the furnace before I'd let someone replace the relay on the PC board. A GOOD tech and supply house will probably be able to find the replacement board.
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Old 02-13-2008, 04:53 PM   #8
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Help finding Control board for furnace


The company arranged to get the honeywell board for me. The owner himself will come and install it tomorrow. If that fixes the issue then I'm more than happy. I'll let everyone know what happens.
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Old 02-13-2008, 07:00 PM   #9
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Help finding Control board for furnace


or the future http://bestbuyheatingandaircondition...cuitboards.htm parts and pricing

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