Hello,

I have a problem I'm hoping someone can help me with. We have a Bryant Plus
80 with an Air Conditioner unit. I haven't used the Air Con for a few days
and today I turned it on and there was no fan. I checked and found the CPU
board just making a buzzing sound. I checked to make sure the fan spinned
freely, which it does. I checked to see if there was 24VAC from the
transformer and there is. I reseated all the connectors on the board, but
there was no change. I did not remove the board though, so the top
connections were not reseated, but they seem to be for the heating area.
One note I should mention is when the Electronic air cleaner filter was
connected to the 24VAC output of the transformer the motor was going on and
off, so I put a regular air filter in and that solved that problem for the
moment. Now I'm wondering if the transformer is not putting out enough
power for the blower relay to kick on all the way, or if the relay is bad
and needs more power than it has been getting. I don't want to replace the
board if I can repair it. I'd appreciate any help you can offer, so I can
test further.

Thank You,

Bob