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- 2 Apr 2007
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Good people out there some advice please.
Ravenheat rsf100et been installed for approx 4 yrs - no problems. Suddenly dhw cycling on / off. [ch working just fine]
Dhw temp set midway.
Get manual out and follow instructions - switch to hot water only.
Take cover off and watch boiler flame whilst hot water tap running- it appears to fire up and the burner flame increases if the temp control is increased.
However it sounds like water is almost boiling and pipe very hot before boiler flame switches off - there is no overheat light illuminated.
Clearly water then runs cold for some considerable time before boiler once again fires up.
Read as many threads as possible and decided it was the dhw control thermistor.
Replace wet for wet - still have problem.
Now here's the thing. When the hot water is running if the ch thermistor is touched or unplugged the boiler switches off! Therefore does this also need replacing?
No wires are crossed etc
Some advice here would be very much appreciated
Thank You
Ravenheat rsf100et been installed for approx 4 yrs - no problems. Suddenly dhw cycling on / off. [ch working just fine]
Dhw temp set midway.
Get manual out and follow instructions - switch to hot water only.
Take cover off and watch boiler flame whilst hot water tap running- it appears to fire up and the burner flame increases if the temp control is increased.
However it sounds like water is almost boiling and pipe very hot before boiler flame switches off - there is no overheat light illuminated.
Clearly water then runs cold for some considerable time before boiler once again fires up.
Read as many threads as possible and decided it was the dhw control thermistor.
Replace wet for wet - still have problem.
Now here's the thing. When the hot water is running if the ch thermistor is touched or unplugged the boiler switches off! Therefore does this also need replacing?
No wires are crossed etc
Some advice here would be very much appreciated
Thank You