Hi.
Seem to have a problem with central heating (heating). Turn on heating and all is ok until I adjust room stat, if it turns off heating and then I turn it up again it will not call for heating on boiler. Valve is opening and if I turn on the hot water the radiators start to heat up, but turn hot water off again and heating goes off. This can last for a few hours and then you can turn heating on again. Plumber changed programmer (honeywell) but problem persists.
2 2port valves (honeywell?)and vaillant boiler.
Thank you for any replies, Max.
Seem to have a problem with central heating (heating). Turn on heating and all is ok until I adjust room stat, if it turns off heating and then I turn it up again it will not call for heating on boiler. Valve is opening and if I turn on the hot water the radiators start to heat up, but turn hot water off again and heating goes off. This can last for a few hours and then you can turn heating on again. Plumber changed programmer (honeywell) but problem persists.
2 2port valves (honeywell?)and vaillant boiler.
Thank you for any replies, Max.