How to mend ... Heat Ch Boiler

while running hot water boiler runs hot & cold for the duration tap is on?

tested gas supply 21 mb flow rate 12 ltr removed heat exchanger dhw clear changed both ch &dhw sensors checked... [Read more]

Vizo boiler fault. Burner cuts out?

A few days ago my 3 yr old combi started playing up. The burner was cutting out while the stat was still deman... [Read more]

no heating?

i have a domestic gravity fed pumped system with two mot. valves. the HW system works fine when controller dem... [Read more]

No HW or CH suddenly from my Vaillant T3WF H Combi Boiler?

This morning my boiler suddenly stopped supplying both Hot Water and Central Heating for no apparent reason. E... [Read more]

My CH only works if I have my HW on as well - help!?

I have a Potterton Netaheat boiler and Potterton Ep2000 controller. If I set the CH to a timer switching or to... [Read more]

Vaillant powermax ?

Am having a problem with my central heating. I can't seem to get the temperature of the house to be any more ... [Read more]

Potterton Performa 24i HE. DHW ok but CH not working?

This boiler had been switched to DHW duties only over the summer and autumn. Now I switch to CH&DHW the CH is... [Read more]

Worcester 240 - one cold radiator?

Hi, I'd be grateful for your suggestions on the following problem - I's got me stumped! My Worcester 240... [Read more]

Worcester 19/24 CBi works for 20 minutes before cutting out?

Had the boiler (4 years old) serviced yesterday, now it locks out with a flashing light after running the CH f... [Read more]

28i junior CH problem?

I have a fault with the central heating of my worcester 28i junior. The boiler fires up and the radiators heat... [Read more]

fellow engineers, advice on ecomax?

righty ho, vaillant ecomax firing whistling and extinguishing. it blew a hole in the flexible re-enforced t... [Read more]

how can I fix a cold radiator?

How can I fix a radiator upstairs that won't heat up? I've checked for trapped air but none. The thermostat... [Read more]

Potterton CH System will not work!?

I have Potterton Suprima Boiler which is heating water only. The CH system is intermittent and only occasional... [Read more]

How do I increase my combi boiler hot water temperature above 60*?

Ferolli Maxima 35C. Good animal, had it for 3 years but it niggles me that the DHW is limited to about 60 deg... [Read more]

how do i replace the diverter valve in my boiler?

I have a vaillant TurboMax plus and started having trouble getting hot water. I can not get hot water when the... [Read more]

ch will not turn off. when on dhw only?

thermostat disconnected on boiler .swich on water only ch still comes on .continuse burning till over heat.

Ravensheat 820 Boiler won't fire up?

My boiler will ignite the pilot light but won't go to full heat, for CH or DHW, any idea's would be great

Baxi Combi 105e - flame-out problem?

My boiler runs oK on CH & hot water. However if I shut the CH off from the Controller ,the Boiler keeps runnin... [Read more]

Sime Friendly Format 80e, replaced diverter valve but rads. still get hot?

Boiler: Sime Friendly Format 80e Problem: Radiators get hot when DHW is run. I had assumed this was the di... [Read more]

Why is the water not heating up?

I have swiched the CH off now the weatehr is hot but now the hot water doesn't heat up - the heating control p... [Read more]