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Basically, the machine does not heat the water up at all and the controller stays is not advancing, until it is forced to do so manually.
The heater element (external) works, because it comes on in the drying cycle.
Does this point to a faulty thermostat, somewhere in the system? I am more used to washing machines than dishwashers!
The G540 is pretty old but washes very well and I am loathed to bin it for the sake of a small part (if it is small, that is!)
Any ideas?
Re: Miele G540, not heating water
Most likely pressure switch not achieving enough pressure therefore not switching on heater. Things you can check, that filter in sump is clear & clean, also that water inlet hose is not kinked or (filter in water inlet hose) is not blocked.
Re: Miele G540, not heating water
Thanks for the reply. I was getting worried then. I will have a little invesigation at the pressure switch blockage and will let you know.
Re: Miele G540, not heating water
Right, I managed to get beneath the machine last night and found that, tucked up inside its gubbins was a little pouch that contained a wiring diagram, dated 1981. Result!
Or not. I checked that the hoses leading to the two pressure switches were unblocked, which they were. Looking at the wiring diagram, there are several thermostats (50, 58, 67 and 72 degrees) and so, thinking logically, surely a thermostat failure would only affect one washing programme and not all of them?
The wiring diagram also describes a Klixon Thermostat and a Klixon Heater Limiter L 170. What are these components for?
Failing me making a diagnosis, does any engineer in the Kidderminster/Worcester area work on Miele?
R
Re: Miele G540, not heating water
Again I would point you towards the pressure switch problem, if you understand that the heater will not be brought into play until enough pressure is acheived by circulation pump ( thus making pressure sw’ contacts ) if you read & understand the circuit diagram you will see what i mean.
So check
A. that there is enough water filing into machine, check fill hose filters
B. that there are no blockage in circulation pump, check pump impellor
C. failing all this, check heater for continuity, should read 20 ohms approx
D. Klixons are thermostats, liniter is most likely a re-settable one (that needs pushed in to re-set)
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