Siemens REV 23 - My heating will not switch off. The 'heating on' indicator is not on and the thermostat does not appear to be switching the heating on and off. The Rev 23 indicates a temp of >26deg although the setting is 21deg. I have had to switch my boiler off because the rev 23 does not appear to be in control.
The magnetron may have either failed or
is not being supplied with the extremely high voltage required to run
it.
Make sure the !!!!capacitor is discharged!!!!!
before attempting any sort of repair.
Check the door interlock
switches first then the high voltage diode with either an AVO model 8
on high resistance range for short circuit, the feed fuse on the
primary of the high voltage transformer and then finally, the
magnetron is best checked by substitution.
Hope that helps.
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