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We have 1841 questions about mending 'hot water boiler problem'

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Mend Heating, Home Heating Systems

can i fit a 2 port valve to a gravity feed heating system?

Hot water is gravity fed through the boiler and through the coil in the hot water tank to heat the water. The ... [Read more]
Mend Heating, Home Heating Systems

low water temp from combi boiler?

Could anyone let me know what may be the problem. My combi boiler works perfectly on the central heating side... [Read more]
Mend Heating, Home Heating Systems

Hot water problems with Ariston Eurocombi boiler?

In short, my boiler will only provide hot water whilst the heating is on, the rest of the time it is either lu... [Read more]
Mend Heating, Home Heating Systems

Problem with domestic hot water. (Valiant combi boiler.)?

Domstic hot water runs hot then warm, Hot then warm instead of a constant temp. Any Ideas?
Mend Heating, Home Heating Systems

Why does my Ferroli F24 keep going to "boiler lock out"?

I have a three year old Ferroli F24 gas combination boiler. At some stage of most days the boiler lockout (sh... [Read more]
Mend Heating, Home Heating Systems

POtterton Puma 80 Boiler Problem?

I have a potterton 80 boiler and the low pressure light is on even though there is plenty of pressure in the s... [Read more]
Mend Heating, Home Heating Systems

How can I fix my Potterton Prima 'F' boiler?

When the hot water or heating is switched on the boiler attempts to start up, i.e. the fan starts and stays on... [Read more]
Mend Heating, Home Heating Systems

F24 misbehaving?

For some time, there has been an intermittent problem of the HW tap in the kitchen failing to cause the boiler... [Read more]
Mend Heating, Home Heating Systems

How can I fix my Ariston boiler?

Similar Question to Dean's (no hot water). My Ariston SX20 has a similar problem, hot water going cold after a... [Read more]
Mend Heating, Home Heating Systems

Glow-worm Ultimate?

Dear Sir/Madam, Re: Glow-warm Model No. Ultimate. I am writing to you to get more information with reg... [Read more]
Mend Heating, Home Heating Systems

hot water on Sime 80E Combi boiler?

what is likely problem with Sime 80E Combi boiler only giving hot water if room thermostat is calling for hea... [Read more]
Mend Heating, Home Heating Systems

Ferroli Modena 102 Boiler - oscillating water pressure?

I have a Ferroli Modena 102 Boiler. When I run the hot water at full bore, after a second or so, the pressure... [Read more]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

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]
Mend Heating, Home Heating Systems

do i need another diverter valve for my alpha 280e combi boiler?

My alpha 280e combi boiler has a problem with the hot water temperature, it fires up ok starts to heat the wat... [Read more]
Mend Bathroom Appliances, Baths and Showers

Vaillant Turbomax plus combi - CH runs when hot tap turned on?

I have a Vaillant Turbomax plus combi boiler - either the 824E or 828E, I cannot currently see which. I hav... [Read more]
Mend Heating, Home Heating Systems

NO HEATING AND NO HOT WATER?

I HAVE A POTTERTON PUMA 100E. MY PROBLEM IS I HAVE NO HEATING OR HOT WATER I HAVE FOLLOWED THE HEATER DIAGRA... [Read more]
Mend Heating, Home Heating Systems

Baxi 80e Combi boiler fails to ignite. Fan + Pilot failure indicated!?

This was an intermittant fault. Usually occured when Heating came on. Before Heating failure, Hot water worked... [Read more]
Mend Heating, Home Heating Systems

Vaillant turbomax vuw hws problem ignition indicator flashes?

When calling for hot water the boiler does not kick in and ignition indicator flashes but it can be resolved b... [Read more]
Mend Heating, Home Heating Systems

Baxi 105e c/htg cuts out of its own accord?

No problem on hot water. C/htg does not cut in if temp lights display a high temp. To get the boiler running... [Read more]
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