rheem ac not working, pcb wont power up. lightning strike.

Old 03-15-12, 07:19 PM
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rheem ac not working, pcb wont power up. lightning strike.

well when I got home, I had several items not working, my router, my computer, several lights through out the house, and well my ac. So I definitely had a lighting strike

I have a rheem criterion II. furnace/ac unit

I pulled the cover off and metered the ac(power) input 124 volts, so good to go with power, but no lights on the circuit board. (yes i hit the door safety switch.)
Next i checked the 3amp blade style fuse, its blown. I ran to auto zone, and picked up a box of fuses.

As soon as I install a new fuse, I hear a humming, and it blows almost immediately. (well its not like a humming more like the relays are firing off real fast. )

I believe the pcb is bad. Any other places to look before I replace the board?

rheem pt#62-24140-02 pcb

edit extra info.

I also when outside an pulled the breaker from the outside unit. I unplugged the large connector from the ciriuit board, and the small 2 wire white connector, I then installed a new fuse, and it still blew.
I was trying to isolate the pcb from all the other items to prove that it was the pcb. I did leave all the other wires connected.

Any other test I could perform?
Old 03-16-12, 05:06 PM
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I would remove the low voltage thermostat wires from the board and then try replacing the fuse. Snap a picture or write down the wiring configuration before removing the wires.

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