My ever unreliable ravenheat combi is playing up again
DHW is fine and hot, the preassure vessel has recharged great and water preassure is constant but the CH is unreliable at regular interval (at least every other day, if not every day) when the thermostat calls for heat the boiler sits and does nothing. if i swith the stat down to below ambient, turn the boiler off (as in mains power) and wait 10 to 30 mins then power up, raise thermostat and bingo boiler fires.
Strange thing is that this can happen when the boiler is cold to the toch or warm
suggestions??
DHW is fine and hot, the preassure vessel has recharged great and water preassure is constant but the CH is unreliable at regular interval (at least every other day, if not every day) when the thermostat calls for heat the boiler sits and does nothing. if i swith the stat down to below ambient, turn the boiler off (as in mains power) and wait 10 to 30 mins then power up, raise thermostat and bingo boiler fires.
Strange thing is that this can happen when the boiler is cold to the toch or warm
suggestions??