I have a problem with a Ravenheat CSI 85 (18 months old) which will only give DHW when the CH is on.
If turned to DHW mode the boiler will not fire.
I have checked diverter valve which is operating microswitch ok when hot water tap is running and also checked that microswitch works and leads back to circuit board are all ok too.
There is allot of corrosion(water dripping) around the DHW thermistor - could this stop the boiler firing up?
Also, this might be a separate problem but sometimes the heating comes on without being asked for but only for a little bit, the radiators get luke warm then boiler stops - i have had a look at the diaphram but it looks ok(i think?)
Any ideas summers coming and having to turn the heating on to warm the hot water is driving me mad!
If turned to DHW mode the boiler will not fire.
I have checked diverter valve which is operating microswitch ok when hot water tap is running and also checked that microswitch works and leads back to circuit board are all ok too.
There is allot of corrosion(water dripping) around the DHW thermistor - could this stop the boiler firing up?
Also, this might be a separate problem but sometimes the heating comes on without being asked for but only for a little bit, the radiators get luke warm then boiler stops - i have had a look at the diaphram but it looks ok(i think?)
Any ideas summers coming and having to turn the heating on to warm the hot water is driving me mad!