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.

Thanks!

 

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.