Originally Posted by Paul52
venter motor is leaking
Gasket problem? Will hi-temp caulking fix it?
In any case get a price for the motor assembly from your local HVAC supply house.https://keithspecialty.com/hvac.parts.Trane_and_American_Standard.htm
Can you make a deflector to keep the water away from your circuit board, while not impeding airflow to the board?
BTW, having three CO detectors in your house will give you "six nines" [aircraft level] reliability - 99.9999% chance of detecting CO if it is present. Get the kind that triggers on low levels of CO.