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Hozelock AC Plus timer battery glitch?

My Hozelock AC Plus timer stops working when screws to the battery compartment are too tight. Even when the sc... [Read more]
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We have 1279 questions about mending 'vaillant'

How to mend ... Vaillant

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Vaillant ecotec 831 plus?

Following a F22 fault where we had no heating and only cold water from the hot water tap, I topped up the syst... [Read more]
Mend Heating, Home Heating Systems

Vaillant F22 fault?

f22 fault how to fix
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Boiler over pressure on the hot-water side?

My vaillant boiler dial is in the red on the hot water side
Mend Heating, Home Heating Systems

Vaillant eco plus 531 boiler?

replaced pcb board f70 ,asks for password no,17, but no 17 on display ,goes from 16 to 22 .on boiler vaillant... [Read more]
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Vaillant Turbomax pro?

Vaillant Turbomax pro. The central heating will not come on but the hot water is working ok
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Vaillant 828E - no hot water?

Green light is not flashing when hot water tap is running. Central heating works ok
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Vaillant condensing boiler ecoTEC plus?

The boiler stopped working and showed fault F22 dry fire. I changed the 3 amp fuse in the electric switch and ... [Read more]
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how do I rectify the fault as detailed below?

occasionally my vaillant eco tec pro combi boiler does not come on in the morning and a bmu error code appears... [Read more]
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Water heater / boiler trips after ignition?

Vaillant VP5-ZE on demand water heater, ignites, but the ignition sparks continue to spark and the system shut... [Read more]
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Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?

My boiler lights easily but after 5 minutes there is a click and then it goes off and the pilot goes out.
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how to fix water pressure its down at bottom of grey part?

the heating and hot water working but pressure looks to low Vaillant ecoTEC condensing boiler
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Vaillant vcw gb242 eh central heating problem?

Hi just wondered if anybody can point me in the right direction, central heating wont come on, if you press th... [Read more]
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Hot water comes and goes!?

I live in Spain and have a Vaillant Geyser (Water Heater) References MAG premium ES 19/2 GXI, GI and ... [Read more]
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can i replace my Potterton EP2 2 way programmer with a Center EHE0200361 RF?

my boiler is a Vaillant ecotec 618 and is NOT a combi, I wish to replace the Potterton EP2 2 way programmer wi... [Read more]
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vaillant ecoTEC plus boiler fault code - how to fix?

I have ave a vaillant boiler and just now i used the kitchen tap water and there is not hot water. And, the bo... [Read more]
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What does f.25 mean?

I have money in my meter but my vaillant boiler keeps saying f.25 the pressure is just above the first line w... [Read more]
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Vaillant igniting issue ( domestic ) not CH?

Hello to everyone, I have a Vaillant sine 18 T-3 combi boiler that was installed in 1985. Have had parts repl... [Read more]
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Vaillant ecomax 828/2 e water pressure sensor?

Hi, I need to replace the water pressure sensor, I understand that it's a quite straight forward fix, can some... [Read more]
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my vaillant boiler is saying a code com on it ?

what do I do when your boiler says com on it an no heating or hot water
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how do I rectify the fault as detailed below?
Mend Heating, Home Heating Systems

Vaillant ecotec 831 plus?
Mend Heating, Home Heating Systems

Vaillant 828E - no hot water?
Mend Heating, Home Heating Systems

Vaillant VCW-Sine18 T3WFH Lights but then goes off after 5 Min?
Mend Bathroom Appliances, Baths and Showers

Boiler over pressure on the hot-water side?
Mend Heating, Home Heating Systems

Vaillant eco plus 531 boiler?
Mend Heating, Home Heating Systems

how to fix water pressure its down at bottom of grey part?
Mend Heating, Home Heating Systems

Vaillant F22 fault?
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Vaillant condensing boiler ecoTEC plus?

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