central heating Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[ptg1174]

hi my central heating wont switch on i have a combi boiler (gloworm) the hot water works ok but when i switch heating on the boiler wont light and no heating

thanks

peter

[nitro23456]

check your room thermostat in the first instance and that your TRVs are on.

[sparx]

also check system pressure gauge

[ptg1174]

all the above seem fine but dont know what trv is ?

[plumbbob]

Thermostatic radiator valve

[Perry525]

There is a diverter valve triggered by a micro switch, this switches the hot water from radiators to heat exchanger. Its probably one or the other.

[greg555]

Did your boiler used to work?

TRV are just the valves at the side of your radiator.

[gasmasters]

[quote="ptg1174"]hi my central heating wont switch on i have a combi boiler (gloworm) the hot water works ok but when i switch heating on the boiler wont light and no heating

thanks

peter[/quote]

if the pressure is to low the boiler will not work on hot water as well heating.
trv's... wether thay are on or off this will not cause the boiler not to fire up for heating.
providing the room stat / programer is ok it does point towords a diverter valve problem

[ptg1174]

yeah the boiler has always worked just that the pilot light dosnt light when i switch on central heating but does when hot water is switched on

peter