My 2.5 year old Ravenheat rsf84et fires when I turn the room stat up. It burns for about half an hour and the radiators are hot. It then switches on and off fairly rapidly, 45 seconds on and approximately 2 minutes off. The radiators gradually cool down. This process will carries on until the radiators are cool. I have had the circuit board changed but this hasn't worked. The room stat has been disconnected to see if this was faulty and the fault persisted. Any help would be appreciated.
Ravenheat boiler malfunction
- Thread starter Mark52
- Start date
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Difficult to say without seeing it as always...
a) Could be your APS when it gets hot it's contacts are not engaging properly causing it to fail to recognize the fan running. What is your hot water like during the "cycling" problem?
b) Possibly your CH Thermistor.
My two cents.
a) Could be your APS when it gets hot it's contacts are not engaging properly causing it to fail to recognize the fan running. What is your hot water like during the "cycling" problem?
b) Possibly your CH Thermistor.
My two cents.
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Whilst your boiler is a combi, is the heating of hot water function not being used?
There seems to be a design fault on this model that I have never had the paid for time to sort out.
It does not seem to have an anti cycling delay on CH.
If there is a CH range rating then its clearly not correctly set on your boiler.
You may need a competent boiler engineer.
Tony
There seems to be a design fault on this model that I have never had the paid for time to sort out.
It does not seem to have an anti cycling delay on CH.
If there is a CH range rating then its clearly not correctly set on your boiler.
You may need a competent boiler engineer.
Tony
Bearing in mind the apparent unreliability of these boilers I am considering replacing it ( the engineer who replaced the PCB advised this). The impression I am getting from the responses is that a combi boiler is not appropriate if you only want the boiler for CH and not for hot water. I would like to maintain the principle of having a sealed CH system and a separate water heater. If a combi is not appropriate, what is?
CH thermistor ... One on the right
My advice is to change the guy who wrongly replaced the pcb rather than the boiler.
They are a bit quirky. Do the thermistors, check that the flue restrictor ring has the venturi tube connection at 90º to the direction of the flue and after that you can use logic to get to the problem.
Ravenheat have an approved installers list. You live near their training centre so shouldnt have much problem getting hold of one. Most other installers wont touch them because they come from B&Q and they are not familiar with them.
My advice is to change the guy who wrongly replaced the pcb rather than the boiler.
They are a bit quirky. Do the thermistors, check that the flue restrictor ring has the venturi tube connection at 90º to the direction of the flue and after that you can use logic to get to the problem.
Ravenheat have an approved installers list. You live near their training centre so shouldnt have much problem getting hold of one. Most other installers wont touch them because they come from B&Q and they are not familiar with them.
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