Our unit does not heat the wash water, except apparently through the rinse water, and only after running it repeatedly (between 10 and 20 times) before it is sufficiently hot to wash dishes.
A bit of troubleshooting shows that the heating element is not receiving any voltage.
I do not have a schematic to follow, and would like to know what are the likely culprits.
Model DHB - S/N 74645
Re: Heats up water slowly, only by repeated operation
The wash tank element should be operated through a 3 or pole contactor which gets its power only when the rinse tank has come up to temp and switched the thermostat over(rinse tank heating takes priority). Is the rinse tank element fully intact ie-is it pulling its full amperage or is part of the element blown causing it to take longer to heat? Is the rinse contactor dropping in when the thermostat for the rinse tank is turned fully down?
It sounds like a thermostat or contactor problem- good luck and let me know how you get on.
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Check the inlet screen to the water circulating pump and the water heater element for lime buildup. I've seen a heater element that had a 1/4" thick layer of lime encasing it. The inlet also had some lime and other debris clogging the screen. After carefully chipping away as much as was practical and running lime remover (such as CLR) through the machine, it heated the water much more quickly and had an effective spray.
To prevent a recurrence of this problem, make sure you have a functional water softener ahead of the water heater feeding the machine.
Cold fill is more efficient in energy usage apparently and makes your dishwasher able to have the A+ sticker on it. There is a heating element inside the unit or in the bottom of the washing hole depending on age of the washer that heats everything up
a regular wash should take about an hour and a half. plus wash would be longer only because it heats the wash temp hotter. wash temp is generally around 140 degrees and your rinse is around 161 degrees.
your flow through heat assembly heats the water at 2 degrees a minute. so it can take anywhere from and hour and a half to two hours for a full cycle. try turning your sink on hot water until you feel hot water coming out then start the dishwasher so it doesnt have to heat cold water up to those temps. it should run a little shorter.
The drying coil that is broken also heats the water during the wash and rinsing phase. Right now it is waiting for the water to heat up, that's why it's pausing. Replace broken heater, they are relatively cheap and can be gotten at repair clinic.com.
Check the cold water line into the unit. Remove the hose from the washer and clean the screen. flush the line while it is disconnected into a bucket or small garbage can. Your washer wont advance without a fill and most fills/rinses are with cold water