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Thread: blower wont shut off
01-26-2013, 07:40 PM #14Lennox started using a universal board a short time ago and sending four different wiring harnesses to replace on the different furnaces. I had to replace a board on a g61 and the original board used 11 of the 12 pins on the mullinex. New board used all 12. Blower always ran till I figured out the old harness wouldn't complete the limit circuit. Changed harness and shagged a$$ outta there
Same with the G32.
Think that's bad? Just wait til you have to start carrying parts for their new furnaces.
The ML193 is up to -4 and has 3 boards, none are cross compatible.
Then there's the pressure switches