clean light flashing - I did the service diagnostic cycle but didn’t seem to help. from what I have read about it either the heater or thermostat must be bad. Is that correct?
Hi,
Yes, you are on the right track. If both the heater and the hi-limit thermostat are good, replace the control board.
Here are the breakdown diagrams and Parts for Whirlpool GU2400XTPT6 Dishwasher - AppliancePartsPros.com
Gene.