Mend > Home Heating Systems

what is wrong with my ferroli optima 901?

the outside overflow is constantly leaking water and even when the boiler is off it sounds like water is being... [Read more]

Why does my Potterton Profile Boiler not fire up?

I hope some one out there can help me to diagnose the problem with my Potterton Profile which will not light.... [Read more]

Baxi 105e HW but no CH?

Hi Ive got a Baxi 105e which has developed a CH fault. Hot water works fine but flame will not remain lit whe... [Read more]

Intermittent hot water one SIME combi boiler?

I have a sime combi boiler, sorry, I dont know where to find the model number, but the heating (radiators) are... [Read more]

how can i fix my combi boiler ravenheat rsf 100?

heating is working fine but when i turn on hot water it keeps goin hot and then cold then hot then cold,can an... [Read more]

how to get boiler cover off!?

i have a potterton profile 100e and the pilot light has gone out. i can't even get the front cover off to fin... [Read more]

How do I replace flow switch on Vaillant combi. boiler?

The Pressure Differential Switch (Flow Switch) on my Vaillant Combi boiler (VCW T3W Sine 18) only works interm... [Read more]

Sime Super 90 losing pressure?

hope some one can help me i have sime super 90 it seems to be losssing presure (about half a bar) after runni... [Read more]

Potterton Puma 80e - Hot Water but not heating?

There is hot water coming from the boiler; this has led me to believe that the pump is working and able to pum... [Read more]

how do the control dials work on creda electric storage heaters?

I have just moved into a flat with creda storage heaters. I understand the room thermostat but do not know wha... [Read more]

PCB for worcester 35cdi mk2 rsf boiler?

Following the fault dianostics, given a fast flashing red lamp, on J flowchart in the owners manua (The fan no... [Read more]

How to fix a error E34?

It is Ariston microGENUS HE 28 MFFI combi condensate boiler. Ones it is heat up it shuts down, even if hot wa... [Read more]

Vokera Excell. Heating system ok but no hot water!!?

Our boiler is operating ok but we are not getting any hot water. If the boiler is not running,usually it kicks... [Read more]

Re Glow.Worm Micron 50FF Fault?

Hi can anyone help with this one, had the above boiler for under 3 years, lately the heating would just turn o... [Read more]

Fan noise from Potterton Puma 80 - 100?

There is a constant fan noise coming from my Potterton Puma boiler (either 80 or 100 series). It goes away wh... [Read more]

Baxi 105e hot water problem?

I have a pain of a problem with my Baxi 105e. It’s not quite 4 years old, the problem we have is as follows.... [Read more]

How can I fix my Vaillant boiler?

How can I re-start my vaillant boiler and what do I do if the "pressure" level is bellow 1? The boiler starts... [Read more]

240 combi boiler?

my worcester 240 combi boiler will not supply me hot water on demand but when the heating is on it runs warm,w... [Read more]

how can I fix my central heating boiler?

I have a Ferolli 77CF combi bolier 1993. If we turn on the hot water we have to continually hold down the pilo... [Read more]

Saunier Duval heating don't turn on?

hot water works fine but heating don't work, its Saunier Duval , i have tried every thing.