My Vailant combi has started to go a bit gaga.
CH works fine, Hot water too, but not together.
When heating is on, hot water is fine for first 10-15 mins then temperature reduces to just about tepid. CH temperature is normal. to get hot water I now need to TURN BOILER OFF completely for 30 mins, and now hot water runs fine. Does not work if I turn CH switch to off, only turn whole boiler off.
Also, sometimes impossible to bet CH off entirely. Even though CH switch off, rads slightly warm. Again only solution to turn whole unit OFF, wait, then back on again.
Also, sometimes CH comes on very very hot on own accord despite switches being off.
I'm thinking that something has 'gone' in the electronic control panel. Anyone with any ideas out there, I sure could do with some help.
Cheers
CH works fine, Hot water too, but not together.
When heating is on, hot water is fine for first 10-15 mins then temperature reduces to just about tepid. CH temperature is normal. to get hot water I now need to TURN BOILER OFF completely for 30 mins, and now hot water runs fine. Does not work if I turn CH switch to off, only turn whole boiler off.
Also, sometimes impossible to bet CH off entirely. Even though CH switch off, rads slightly warm. Again only solution to turn whole unit OFF, wait, then back on again.
Also, sometimes CH comes on very very hot on own accord despite switches being off.
I'm thinking that something has 'gone' in the electronic control panel. Anyone with any ideas out there, I sure could do with some help.
Cheers
