How to mend ... Thermostat Heating System

Programming Honeywell CM921?

Hi: The heating engineer installed this unit during installation of a new boiler. This is a 1 day wireless pro... [Read more]

c h boiler heats HW supply only,no central heating?

My system is a fully pumped central heating installation, with room & cylinder thermostat. Could the motorise... [Read more]

No heating, but Hot Water works fine Vaillant VuW 242 failure: F.28 ?

In my case F.28 comes ONLY if heating needs to start. If I open the hot water tap during CH ignition attempt,... [Read more]

Drayton rf1 wireless system problem?

Recently moved home. I have followed all the Q&As on this site regarding the rf1 system in my new home. I pu... [Read more]

Does anyone know how to reset the alarm on wireless thermostat receiver?

I desperately need help...3 years a go i had a new heating system installed with Britsih gas. Yesterday i ... [Read more]

how to set my boiler and thermostat up?

i have the Glow-worm ultimate boiler system please could any body tell me how to set the system up as its cold... [Read more]

Heating systems?

Hello I have a Potterton Netaheat boiler. In spite of putting in a new pump and desludging the system, the ... [Read more]

Bosch Worcester Highflow 400 no heating no hot water?

We've had an ongoing deries of problems which Brit.Gas are struggling with... 31 Dec: no heating/hot water - ... [Read more]

Vaillant ECOmax 824E constantly runs with "06 Boiler shut down"?

i recently had a leak in the 6" rubber pipe in my vaillant boiler. I drained the system and replaced the pipe... [Read more]

Boiler cutting ouit?

We have recently had a new central heating system fitted, and are having problems, what we have is the boiler ... [Read more]

cool radiator?

Hi,I have a gas fire, and a radiator under my front window. The radiator operates hot and cold,which makes t... [Read more]

Whistling noise and blank screen on my potterton 2001!?

I have a potterton ep2001 controller on my gas heating system.It was working fine when i switched it off but w... [Read more]

Potterton Promax 15HE Boiler -relay clicking problem?

Hi, Need some help please. A 6yr old Potterton Promax 15HE on an unvented boiler installation has suddenly st... [Read more]

Worcester 19/24CBI Problems (Over Heating, Fail to ingite)?

Hoping that someone can shed a little light on my problem or that this may help someone in a similar position.... [Read more]

how can balance my heating system?

How can I get the balance right between a room thermostat and thermostatic radiator valves. The TRVs are not ... [Read more]

Ideal Icos Boiler, Heatrae Sadia CL170, Reliance Pressure gauge?

My CH/HW system consists of the above components plus a room thermostat and control panel beside the boiler. A... [Read more]

Central heating not working independantly?

Replaced room thermostat as old one damaged, replacement is Drayton Combistat, 3 wire config'. All seemed wel... [Read more]

Heating system failing but boiler ok??

My thermostat is reading 17, and having been set to 20, the heating should be on. A flame is showing on the th... [Read more]

Glow.worm 30SXi F13?

4 year old boiler started to trip out with a F13 fault on display. British Gas have replaced main PCB and wiri... [Read more]

how can i fix servowarm elite 50 heating system?

does anybody know were i can obtain a thermostat for a servowarm elite 50 was told they are obsolete please e... [Read more]