Electrolux de 6850 dishwasher

Please take care with safety and mains isolation before testing
The heating coil should have a resistance of about 25 ohms. This item is shaped like a toilet roll centre and can be found in the very bottom of the machine. However this model often fails to heat because of a relay fault behind the front control panel. I would check this item first because you onlt have to open the door and undo the top eight screws. Open the electronics box and Check the relay. This is the biggest item on the board with five wires. look for a burn on the solder side or remove relay and test. 12v to coil to get a click and contacts make and break. Some boards need a short piece of wire (15mm- max) to repare the solder track that is missing.

if you have a continuity tester (ohm-meter), then yes, you can find the fault. check the heating coil located at bottom of wash basin and trace to wire connections and test for very low ohms through this coil...if not very low ohms (2-10 ohms) found then replace coil. if coil test ok, then continue tracing wires to source driver for any possible fault such as bad over temperature breaker (or fuse) or bad contactor.