Hi my system is potterton profile boiler + hw cylinder with l641A1039 cylinder thermostat and Y plan valve +st6400C programmer past few days i suspected water was very hot decided to check stat ( i turned down room stat) i cannot hear any clicks on turning cy stat right down or right up? Does it mean faulty cy stat?
Also with my limited knowledge i thought turning cy stat right up would fire the boiler but this did not happen?
Should this happen? Thanking in advance for help/advise
Ih
Ps programmer was not set to call hw!
Also with my limited knowledge i thought turning cy stat right up would fire the boiler but this did not happen?
Should this happen? Thanking in advance for help/advise
Ih
Ps programmer was not set to call hw!