Carrier Furnace Circuit Board Replacement

Old 05-17-22, 03:58 PM
Thread Starter
Join Date: Oct 2008
Location: USA
Posts: 36
Received 0 Upvotes on 0 Posts
Question Carrier Furnace Circuit Board Replacement

My Carrier Furnace (model 59SC5A040S141110) has what appears to be an issue with the circuit board.

The Heat nor AC would turn on. So I went down to look. It had a (blinking) 2-4 error code, which is "The secondary voltage fuse is open". I shut off the switch, opened it up, pulled the 3A fuse from the circuit board, and sure enough it was blown. So I replaced it. I tested the heat, and it came on. Then I switched to cool to test the A/C. Nothing. I went back to the furnace. The status light was completely off. I shut off the switch, waited, turned it back on, still no status light. Did the same with the main breakers for furnace and A/C. Nothing. Opened up the furnace, pulled the fuse, and the fuse was still good. However, it smelled a bit of burnt electronic components inside. I looked closely at the circuit board and did not see any scorching, but I know that doesn't always mean nothing is fried.

So, instead of calling a furnace repairman, I thought I might try to replace the circuit board myself. That is something I am fairly confident doing. However, I am unsure of the part number I should replace it with. There appear to be 2 part numbers on my current circuit board: "CEBD431012-11A" and "CEPL131012-02".

I have found several similar part numbers on eBay:
"CEBD431012-01A -- CEPL131012-01"
"CEBD431012-02A -- CEPL131012-21-1"
... as well as some others.

Do I need to match the part numbers exactly? I'm assuming the last few digits are revision numbers. And the electronics I have worked with, a different revision number often means it will NOT be compatible.

Old 05-17-22, 05:13 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,022
Received 3,410 Upvotes on 3,059 Posts
Did you check the 24v transformer ?
You said the system worked fine on heat but failed on cooling.

That tells me you have a shorted wire or component in the cooling system.
The control board is only for heat..... but the 24vAC travels thru it.

I only buy replacement boards based on OEM approved subs.
The numbers do mean something.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: