clean light flashes but i dont know where to look for the heater circuit, to replace it
Here are your parts
Replacement parts for WHIRLPOOL GU2600XTPS3 Undercounter Dishwasher | AppliancePartsPros.com
Here is the tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208535451.pdf
Here is a manual note it is not for your unit but some sections should apply to yours
https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/a045b97f9e505696852574ce0049f265/$FILE/8178741.pdf