Ok, cool, glad to know I'm getting help form WP servicer :-)
Yes, so there are 3 boards in my possession: (both 2 new boards were shipped in Whirlpool Certified Parts box and they have WP silkscreen on the board).
- Original CCU board, it has black motor relay box on it. When I press start button and hold for second or two, there is a distinct "click" on relay, but obviously nothing happens then.
- I purchased a new CCU board. It has blue motor relay box, and there is No click sound when I press the start button. I was then skeptical that this CCU board was lemon.
- 3rd CU board arrived yesterday, it has blue motor relay box also, and there is No click sound when I press the start button. Blue relay box looks to be identical in size from black one, but is it a solid state relay? is that why it's not making the noise? I read in google that solid state relays get hot and it typically has heatsink on it, but this blue motor relay box is enclosed plastic, hard to believe it would house a heatsink inside.
Reason I originally thought was CCU was based on below info on tech manual: mine read 2ohms, with no open circuit.
5. Motor Circuit Check - Access the CCU and measure the resistance across P8-4 and P9-1.
If resistance across P8-4 and P9-1 is in the range of 1 to 6 Ω, the motor circuit is acceptable. Replace the CCU.
Otherwise, continue to step 6.
This may be a dumb question, but does dryer have to be connected to gas line to allow motor to start? I do not have gas line hooked up since I unplugged to work on the dryer. Not sure if there are any sensors that would prevent dryer to turn motor. I doubt it, but I probably should ask anyway.