@ivandrocco - THIS IS THE EXACT SAME PROBLEM I AM HAVING NOW

I am having clicking from the CCU, lukewarm heat, and very low power (3.5v) to the monovalve on defrost position.

The clicking is driving me mad...

The clicking completely stops ONLY when I disconnect fuse 8 at the fuse block (heater blower motor/AC compressor)

I put in a good working CCU and the same clicking sound occurred, so the CCU is not the problem.

Can't figure out what is wrong, but this is what I've found so far.