...had several attempts to repair the Candy dishwasher heating fault - still no joy.
Trawled many threads in the forum for dishwasher heating fault info, in order to gain an understanding of where the heating system commonly fails. I've carried out the following:
Measured resistance of the heating element, gives 29 ohms, which I believe indicates the element is in good order.
Replaced the NTC thermostat.
Replaced the PCB heater micro relay. (On inspection there wasn't any sign of burn marks on the circuit board or micro relay beforehand)
Inspected wiring to/from heating element, all in good condition, making good connections to other components.
Unwrapped the protective tape around wires routed up into the base of door for inspection (as they're subjected to flex each time door is opened) - all in good condition.
Are there any other components that have an input to a dishwasher heating system? Assumed the door latch sensor must provide an input, have examined and cleaned the spade connectors on there too.
The machine operates ok in all respects except heating the water. Each program runs it's course as expected - fills, sprays, opens the soap hatch, washes, drains - always in the expected time frames. Rinse aid and salt levels are topped up.
Any (sensible!) suggestions on what to try next greatly appreciated.