Central Heating

[tooj]

I've just had my gas boiler serviced and I asked the the man if he would check the 'Diverter' in the airing cupboard if it was working as it does not move when I switch from water to heating. He said it was OK but I can't help worrying that when the central heating's on that it is overheating the
water in the boiler. Could anyone set my mind at rest? Thank you

[donny48]

You will have a thermostat on the boiler which will prevent it overheating. I fail to see how or why you would ask or accept advice on-line and yet yet disbelieve the service engineer.

[bhg481]

When the timer switches on the central heating the system is designed to heat the water first and then switch the diverter valve to the radiator position.

[tooj]

Thanks.........Donny 48' I was at the doctors when he came and I'm not sure whether my wife gave me the right info. It's still not moving from the left hand side at all so I don't think it's right. I asked for advice on line because I don't want another bill for the same thing

[The Builder]

Tooj... are the rads warming up? If they are, then the diverter is working.

Confirming what the others have said ..............

You may find that the diverter doesn't change over immediately if you have a thermostat on the immersion cylinder since that thermostat gives priority to the hot water circuit. If that is the way the system is wired.

When the hot water is up to temperature, then the rads will take over.

[donny48]

As mentioned by Builder then if you have both hot water and heating selected then if your rads get hot then the diverter has obviously worked. On another day when the rads are cold then select hot water only, if you get hot water and the rads stay cold then again it's working.