How to mend ... Demand Ch Boiler

Vaillant Turbomax 828 problem?

This is a strage one! I am not sure whether my diverter valve is on the way out or whether something else is c... [Read more]

Ravenheat CSI 85AT fires up and goes of every 20 seconds?

I have a Ravenheat CSI 85at that is just over 3 years old. This is the one that does NOT have the honeywell ga... [Read more]

Ravenheat CSI 85T not firing?

Our Ravenheat boiler has given up on CH and HW. There has been an intermittent fault (fault described below) f... [Read more]

The CH Demand light keeps flashing slow and cutting off the heating?

As above, when you hold down the red button the boiler re-starts, but after a varied time the boiler cuts out ... [Read more]

How Can I Fix A Potterton EP2002 Heating System?

My daughter has a Potterton EP2002 system with a Potterton Suprima 40L boiler and a MPE322 diverter valve. Th... [Read more]

no central heating on demand?

when i select CH boiler fails to ignite but when i select just HW i get hot water and central heating is th... [Read more]

Worcester 35CDi II Flame Indicator Off?

I came home from work last night and the green Mains Indicator was on, the CH Demand Indicator was flashing sl... [Read more]

Potterton puma 80 wont fire ?

CH demand and pump on .No fault LED on When water tap is turned on red LED comes on in MOD board but boiler ... [Read more]

potterton performer 24kw HEcombi?

Hello ,is there any quallified heating engineers out there who may know wat this fault is. no hot water,the p... [Read more]

ariston microgenus 23mmfi no ignition?

When demand for ch /hw? boiler will go through all sequences, opening gas valve to soft light 5mb, but there ... [Read more]

Worcester 24i RSF Junior - Water Flow Switch Melted!!?

Hi, had a few probs recently wi boiler, new Gas Valve & new PCB within last 2 months seemed to have sorted it.... [Read more]

Worcester boiler 28 cdi - Re igniting when lit?

I have had a number of problems with a Worcester 28 CDI recently. The board had to be replaced as a circuit h... [Read more]

Vokera 80SP question?

The boiler works fine both HW and CH, but the operation sequence seems not quite right. When CH is selected, i... [Read more]

Vaillaint COmbi boiler CH turns off after 1minute?

My mumz Vaillant combi boiler (18yrs old) ignites for CH demand then the flow heats up, Return remain cold...a... [Read more]

Ferroli Optimax HE 38C No CH and HW switching on/off?

The boiler will sit waiting for HW demand, will supply HW mostly but sometimes display just goes off (so does ... [Read more]

worcester 24i rfs combi problem?

i have fault with my 24i combi. when demand on either ch or dhw is on, the boiler fires, lights but keeps on s... [Read more]

Why doesn't my Worcester Junior 24i fire up immediately?

Boiler is 5 years old and serviced yearly. Lately it does not fire on demand CH or HW. Fan comes on as does ... [Read more]

why does my boiler fire up on its own?

I have a worcester greenstar 28ijunior boiler and every so often it fires up on its own(ch not on, no hw deman... [Read more]

Vaillant Turbo Max Problem?

Hi, I had a classic case of a diverter valve problem. No DHW - the plastic arm wasn't engaging the micro switc... [Read more]

worcester bosch 24i intermittent ignition?

Hi, My WB24i has an intermittent ignition fault developed over the last few weeks. the DHW demand seems ... [Read more]