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Da' Man! Thanks.

I foundeth a schematic of a similar board. It showed a high pressure & a high temp. switch in series between Lo & L1. I doth not haveth these. Also, I traced out the terminals on the rear of the board & could tell where some of them went. Odd thing is one of the sensor terminals was connected to...

I think I got it. Needed a jumper from Lo to L1. Still need to test dfrost cycle. Should know in about an hour.

Ok, the new board is also a York 03101251000, ICM303, Evcom 9218-374, and many other cross referances. I don't even have a good schematic of the old one due to the weather wearing on it. I will attempt to post a pic of the new board. I'm thinking someone must know where a wiring schematic for...

Hello, I have an older Comfortmaker heatpump with electric backup heat. My defrost board went bad so I bought a replacement. The board I had was a "Potter Brumfield 34332100". I could not find one of those so I bought a "Amana Goodman LR40061". This is supposed to be a replacement for my old...