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

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Mend Heating, Home Heating Systems

'f19' error report - Saunier Duval 'Thermoclassic' boiler?

Recently my boiler is failing to deliver hot water. - It is hot at first then runs cold. On examination I fin... [Read more]
Mend Heating, Home Heating Systems

halstead ace he 30 dhw problem?

Hi All, I wonder if there is someone out there who can help with a very strange fault on a Halstead Ace HE... [Read more]
Mend Heating, Home Heating Systems

Baxi 105e Combi - Hot then cold water cycle?

Hi, I have a BAXI 105e Combi boiler in the house I have just brought, it was installed in 2006. I have noticed... [Read more]
Mend Heating, Home Heating Systems

ea code?

Hi - looking after friend's house and central heating packed in. It's a Worcester combi boiler and EA message ... [Read more]
Mend Heating, Home Heating Systems

vokera 29 HE hot/cold water?

when running hot tap fully open, burner shuts down and water runs cold for a moment then burner fires up and ... [Read more]
Mend Heating, Home Heating Systems

central heating Works but no hot?

Central heating works, boiler on, power on, all ok from tank (system mate) there are 2 pipes 1 label hot wat... [Read more]
Mend Heating, Home Heating Systems

hot / cold water?

SIME Format Freindly 80e Hot water runs red hot then luke warm then red hot again just keeps up/down with t... [Read more]
Mend Heating, Home Heating Systems

Trouble with Hot Water?

I have a Worchester 9.24 BF Combi and had very little or no trouble with it over the past few years. However o... [Read more]
Mend Heating, Home Heating Systems

15\19 heatslave hot water?

I have a 15\19 heatslave boiler we did not use it for a time when i put it on the central heating was fine but... [Read more]
Mend Heating, Home Heating Systems

Shower not working properly on baxi with calor gas?

I have a combi baxi which is run on calor gas. The central heating seems to work fine but the shower is now no... [Read more]
Mend Heating, Home Heating Systems

vaillant cant see model number?

central heating working fine but hot water runs cold after a short while.
Mend Heating, Home Heating Systems

no hot water evrything fires up?

Hi need help. Iv`e got a sime super90 I fitted a new diverter valve and micro switch about 8 months ago. Ever... [Read more]
Mend Heating, Home Heating Systems

Potterton Performa 30 HE Central Heating Sensor?

Hi all, I'm experiencing some intermittent problems with my Potterton Perform 30 HE. If anyone could advise... [Read more]
Mend Heating, Home Heating Systems

alpha 280e ocean boiler problem?

i am losing hot water as i run the tap. the central heating is fine but when i put on the hot water it runs ho... [Read more]
Mend Heating, Home Heating Systems

POWERMAX 155 - Will not heat water & radiators simultaneously ?

Hi all. I was hoping that someone could help? My Powermax 155 will not heat the water to the showers or taps, ... [Read more]
Mend Bathroom Appliances, Baths and Showers

Possible problem with diverter valve?

I have a Vaillant TurboMax 824e. When running hot water it initially runs warm water then cold then warm then ... [Read more]
Mend Heating, Home Heating Systems

my baxi combi instant 80e?

central heating workin fine, however the hot water when running a bath runs cold after a few seconds. the wate... [Read more]
Mend Heating, Home Heating Systems

No water running from hot tap?

I have no water symbol on my Vaillant Eco Plus boiler and when the hot water tap is turned on no water runs fr... [Read more]
Mend Heating, Home Heating Systems

Glow worm Betacom 24c no hot water but central heating fine?

Hi, I had a new boiler fitted about 8 months ago, everything has been working fine until last week, now for s... [Read more]
Mend Heating, Home Heating Systems

BIASI Combi produces heating but no hot water?

I am at my mums and for weeks it would appear she has been living with this problem. The BIASI Combi runs the ... [Read more]
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