I have a 4 year old H500FDPASME and it stopped working.
In all modes (standby, spa, pool), a relay (or 2) cycles (clicks every 15-20 seconds) on the control board.
Voltages are around 26 at test points.
Blower never comes on; no voltage to blower connector on control board.
I replaced control board and transformer and vacuum sensor -- still the same symptoms.
Display lights and I am able to cycle through the modes, but I can only increase set temp to 80* and then when I push the up button again is goes to 65.
Transformer gets warm -- my theory is that the relay closing and opening is powering something.
Disconnecting the display board results in the same symptom (clicking).
Anything else it could be other than the display board?
Thank you!
