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We have 66 questions about mending 'runs cold central heating'

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Mend Heating, Home Heating Systems

Got Ravenheat RSF 820/20 central heating ok but water is running cold?

Central heating is working fine but when turn hot tap on full, water runs cold (if leave it running as a trick... [Read more]
Mend Heating, Home Heating Systems

Intermittent hot water with my Vaillant TURBOmax VUW 242E?

For the past 4 months I have had intermittent hot water with my Vaillant TURBOmax VUW 242E, well rather luke w... [Read more]
Mend Heating, Home Heating Systems

how can i fix my glowworm swiftfow 80?

every time i turn the heating on, it starts up fine but only runs for about 10 min`s then goes out but the pil... [Read more]
Mend D.I.Y, Plumbing

Low hot and cold water pressure?

Hi, can anyone help me??? I have recently put in a new kitchen and two new bathrooms in my house, and now havi... [Read more]
Mend Bathroom Appliances, Baths and Showers

valliant turbo max combi boiler problem?

Two problems. I had a refit in my kitchen the controller for the boiler's wires got pulled out. What goes w... [Read more]
Mend Heating, Home Heating Systems

Central heatin only works with hot water on?

I have a potterton boiler that only fires up when hot water is switchted on.Once water gets to required temper... [Read more]
Mend Heating, Home Heating Systems

Boiler fires up when demand for hot water but doesn't when demand for C/H?

I have a Potterton Netaheat Profile 80e boiler, Honeywell V4073A mid-position valve, Honeywell ST699B programm... [Read more]
Mend Heating, Home Heating Systems

Vokera Maxin 24e Lockout?

I am having problems with the Lockout Reset Button illuminating intermittently on my Vokera Maxin 24e, the con... [Read more]
Mend D.I.Y, Plumbing

hot water flow?

Dear all I have a potterton puma 80e combi boiler. The hot water from the sink tap and Bath taps runs very ... [Read more]
Mend Heating, Home Heating Systems

Heating ok bit no hot water?

I have a sime halstead heating boiler. The central heating is ok but hot water for about 5 mins then it runs c... [Read more]
Mend Heating, Home Heating Systems

ferroli mondena boiler?

when the domestic hot water tap is turned on, the water runs hot for a few seconds then runs cold, but when th... [Read more]
Mend Heating, Home Heating Systems

Intermittent Fault Vaillant turbomax VUW 242E?

How can I fix my Vaillant Turbomax VUW 242E? My boiler is 8 yrs old. The flame indicator illuminates but th... [Read more]
Mend Heating, Home Heating Systems

Bosch 350 Combi. CH not working domestic water OK?

Bosch 350 Combi. I have a similar fault to an earlier posting in that domestic water is OK but central heating... [Read more]
Mend Heating, Home Heating Systems

No hot water...DO I really need to replace my Vokera 24E?

My 8yr old vokera boiler working for central heating but not water. It manages about five seconds of very hot... [Read more]
Mend Heating, Home Heating Systems

I have a problem with my hot water via a Potteton Puma 80e boiler?

I recently drained and recharged my boiler / radiators to change a TRV and get alot of air out of my rads. But... [Read more]
Mend Bathroom Appliances, Baths and Showers

shower suddenly running cold?

I dont have central heating my coal fire heats my hot water.I have an electric shower and over the last six mo... [Read more]
Mend Heating, Home Heating Systems

how can i fix my worcester 24cdi boiler?

the digistat which is less than twelve months old has stopped working and recently the shower which runs throu... [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 Bathroom Appliances, Baths and Showers

Increasing water flow from taps?

I live in a rented flat. The cold water for the kitchen sink is provided from outside. This runs very fast! Bu... [Read more]
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