Why is water collecting in my electric hot water heater tray?

Question

I believe the source of the problem is actually my A/C unit.

Answer 1

condensation

Answer 2

Your AC drain should not be connected to the water heater drain tray. I think someone got lazy and made this connection. The WH draintray should be piped to the outside.

Answer 3

USA  It is ok to have the AC condensation line run to the water heater tray, but the pipes should be separated.  Check the ac unit and see if it is leaking into the pipe.  Make sure it is not the water heater leaking.