Fix Fault Vaillant

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We have 1279 questions about fixing 'vaillant'

Water dripping from opening at top of pump?

I've got a Vaillant thermocompact that keeps losing pressure. There is water dripping from what looks like a small sticking up outlet on top of a small cylinder attached to the top of the pump. Any id ... more


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How can I fix my Vaillant turbomax 828 ??

A certificated plumber recently made a repair to my Vaillant boiler, after which the unit appeared to be working ok apart from the pressure gauge which was soon indicating unacceptably high pressure i ... more


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Vaillant ecotec 937?

Firstly thanks to ltd for response reference no hot water. I have no hot water from my Vaillant ecotec 937 - it shows no Fault Code - the water comes through the hot taps "stone cold" but the radiato ... more


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I have no hot water from Vaillant eco tec 937?

I have no hot water from Vaillant eco tec 937- only cold water flows through the hot taps - diverter valve replaced last week - might this be the flow sensor or something else - (radiators are working ... more


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how to fix error code f64?

boiler keeps showing error code f64 even when reset.it is a 828 vaillant turbo max boiler


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Vaillant eloblock problem?

hello. I have a 6kw water heater from vaillant and it recently shut down from an overheat protection, (F 20 displayed) which I don't know when or how occured. I flushed it with cold water through th ... more


Vaillant gb 242 eh?

My central heating will not ignite the fan comes on ok and the hot water works ok


home heating system?

my eco tec vaillant boiler heat water but the central heater can not start


lhow to fix Vaillant ect tec pro f75 fault?

My vaillant ecotec pro 28 He combo Ng has come up with a F75 fault.I can reset it and everything's fine until the next morning when I've got no heating or hot water. I've checked the water pressure b ... more


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vaillant ecotec plus 937?

pressure rising from 1.2 to 2.4bar in couple of hours even with boiler turned off. Suspect plate heat ex. any othe suggestions. Fill loop has been disconnected and doesnt let by.


how to fix f22 on vaillant ecotec plus 418?

I came home to a fault f22 on my boiler. How do I pressurise my boiler as I cant see any taps or anything under my boiler


Is my Siemens room thermostat wired in correctly?

I have a Siemens RDJ10RF room thermostat set fitted to my Vaillant Ecotech Plus 831 boiler. The remote room stat talks to the receiver but the boiler fails to start/stop on command from the receiver. ... more


Where to find the BR1 receiver for Boss Thermostat?

I'm trying to follow instructions on another thread to reset my Boss Thermostat, which has stopped communicating with the boiler/receiver. I don't know where to find the BR1 receiver. I have a Vaillan ... more


recurrent F22 error code on Vaillant ecotec plus 624?

keep topping up water Pressure but it keeps dropping.checked for leaking rads and nil found.Any suggestions?


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Valiant boiler showing F64?

Hi - Our Vaillant Eco max boiler 824 was not giving any hot water this morning and showing code F64. I phoned their helpline and the technician said that means the electric circuit board is damaged a ... more


Heating?

How do I change my pressure relief valve on a vaillant combimax ?.


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Boiler turns on and off at will?

I have a vaillant ecoTEC Plus 837 boiler that is almost 3 years old. This is controlled by a salus wifi controller (I know that these are not great). The problem is at at will, the boiler turns itsel ... more


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Boiler turns on and off at will?

I have a vaillant ecoTEC Plus 837 boiler that is almost 3 years old. This is controlled by a salus wifi controller (I know that these are not great). The problem is at at will, the boiler turns itsel ... more


Vaillant Turbomax 824 Problem?

Hello, I have a Vaillant Turbomax 824 E and have managed to sort out problems with it myself in the past by looking at forums. Slowly but surely a new issue has developed, which I've worked out i ... more


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Vaillant atmoMAG water heater ?

I have a Vaillant atmoMAG water heater that lately has starting igniting to full power as soon as i turn the flame up, before I turn any tap on. Also, when I turn the tap off it doesn't stop working. ... more


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