How to mend ... Hw Ok Not Ch

Biasi M90F.24s?

Boiler was running ok! then sprang a leak that was traced to the main flow switch membrane. This was replaced ... [Read more]

I have a potterton profile 80el short cycling 1 min 'off' 1.5 min'on'?

Replaced pump (sticking)and heat exchanger (leaked). Since these changes the boiler started short cycling - ... [Read more]

Groaning Ariston Boiler?

Our 3-4 yr old boiler has started making groaning noises. HW & CH appear to be fine. Any ideas?

Spectrum Fuel-Miser Mk IV?

My central heating system has a Spectrum Fuel Miser Mk IV which provides: . Electronic temperature control of... [Read more]

worcester greenstar?

my worcester greenstar 440 drops pressure when the hw is used it starts to make a noise like the pump is runni... [Read more]

Rwb9 siemens landif and staefa control?

The hw and ch won't come on, it flashes a 3p code too, if I hold the reset button it will come on but as soon ... [Read more]

Potterton performa 28 keeps cutting out?

My Potterton performa 28 fires up for approx 15 seconds then stops. After maybe 30 seconds it will fire up aga... [Read more]

Have an intermittent problem on a Sime 100 boiler?

Have an intermittent fault on a Sime100 boiler. Sometimes works fine other times does not work at all for hot... [Read more]

How can I fix my actuator?

I suspect that the actuator on the motorised valve (BGMVSP-23, aka Drayton MA1) is broken and would appreciate... [Read more]

heating, no hw on 24i junior?

I used the shower this morning, washed the dishes etc., everything was fine. Then the hot water failed. Ch wor... [Read more]

How can I fix my mega flow HW/CH pressure problem?

The pressure gauge keeps dropping rapidly to zero and the boiler turns itself off. I have topped up the press... [Read more]

Worcester 28i Lockout?

I am an electrical engineer but have only minimum knowledge with boilers. When the boiler is asked for HW no p... [Read more]

Potterton Profile 80E Starts OK on HW but not on CH?

Boiler would start (fan running for 20 seconds) but would not complete the ignition cycle. Replaced the PCB. A... [Read more]

24i junior problem?

boiler hung and fitted all connections good filled and vented system and boiler .no external controls. therefo... [Read more]

ravenheat csi85 combi read this it will help many!?

I have a ravenheat csi85 boiler, the hot water works fine. The central heating started switching on /off, it w... [Read more]

Ravenheat 84E boiler not firing up?

Hi can anyone help boiler is not firing up with ch or hw fan working , pump working pilot is sparking and has ... [Read more]

combi boiler?

when hw or ch is turned on the boiler runs ok for a few minuites then cuts out and the overheat cutout comes ... [Read more]

My potterton ep 2000 controller is it worn out?

When both switches (ch and hw) are in the on or 24hr position on the controller the motorised valve should go ... [Read more]

Ferroli Modena 102?

Just had the thermistors replaced on above model. Am now getting the low CH pressure light flashing, despite ... [Read more]

Worcester oil boiler; hot water on CH off, but CH keeps working?

I have a Worcester Heatslave oil boiler. the HW is on constant but when it kicks in to warm up the water, t... [Read more]