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We have 1279 questions about mending 'vaillant'

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Mend Heating, Home Heating Systems

why does the pump keep running when I turn the hot tap off?

My Vaillant combi boiler VCWE 240 works fine with the heating, but when I use the hot water, it doesn't switch... [Read more]
Mend Heating, Home Heating Systems

I have a Vaillant thermo compact plus 628E ?

Please can any one advise me on what I can do with a F23 fault on the boiler. Done flush and changed the pump... [Read more]
Mend Heating, Home Heating Systems

My 18 year old Vaillant VCW GB 242?

The boiler has started losing a lot of water & needs topping up at least once a week. I have been advised by ... [Read more]
Mend Heating, Home Heating Systems

Ravenheat heating thermostat transmitter does not work?

My Vaillant combi boiler provides hot water but the Ravenheat transmitter type thermostat has stopped working ... [Read more]
Mend Heating, Home Heating Systems

How to refill Vaillant ecoTEC pro system?

I have a Vaillant ecoTEC pro combi bolier. Following workmen removing a radiator I have an F22 code error. How... [Read more]
Mend Heating, Home Heating Systems

How difficult or easy to replace pump on boiler?

We have a Vaillant Thermocompact 615EH boiler which has started to get noisy and needs replacing. It looks rel... [Read more]
Mend Heating, Home Heating Systems

Have a vaillant ecotec plus 824. The water gets hot then goes cold?

Have a vaillant ecotec plus 824. Real problems!!The water gets hot for about a minute then goes cold and stays... [Read more]
Mend Heating, Home Heating Systems

vaillant ecomax 835-e we have hot water but heating does not fire up?

we operate our boiler manualy turning it on and off as we need it our hot water is working fine but our heati... [Read more]
Mend Heating, Home Heating Systems

fault code s.0?

my vaillant boiler wont turn on
Mend Heating, Home Heating Systems

How to adjust heating & water controls Vaillant ecoTECpro?

Since being serviced recently both water & heating have become too hot; the dialls on the left which control w... [Read more]
Mend Vehicles, Mobile Homes

Vaillant mag125/7 LPG water heater?

Hi, I have a fault with the water heater in my motorhome. It is slow to ignite the burner when the hot water t... [Read more]
Mend Heating, Home Heating Systems

how to fix my Vaillant ecotec plus 824?

My boiler is flashing con on display as I have had a rubber pipe split. I have tried hair dryer for 1/2 hour ... [Read more]
Mend Heating, Home Heating Systems

Ignition indicater flashing VUW242/1E Vaillant?

Timer turns heating off 30 seconds later Ignition indicater flashing . Power off resets til hot water or heati... [Read more]
Mend Heating, Home Heating Systems

vaillant ecomax 828/2 e?

hot water runs cold after a couple of min, no fault showing on the display panel
Mend Heating, Home Heating Systems

Vaillant ecoTec 831 I have hot water but no heating?

Please help! Our heating has suddenly stopped working. The display shows that the internal pump is running, ... [Read more]
Mend Heating, Home Heating Systems

Pressure increase and decrease problem?

I have a vaillant combi turbo 824e and have noticed the pressure dropping to well below 1 bar. I top up and bl... [Read more]
Mend Heating, Home Heating Systems

Vaillant turbo max going into lockout??

Iv got a customer with a vaillant turbo max,black front green control buttons,gc 4704425.wen heating is on,the... [Read more]
Mend Bathroom Appliances, Baths and Showers

could anyone help me please my vaillant boiler wont switch on?

my valliant boiler wont switch on, the fuse is ok, the lights on the boiler are off even when i switch it on
Mend Heating, Home Heating Systems

Change diaphragm on Vaillant boiler valve?

I have got a Vaillant boiler model no VUW 242 EH and need to change the diaphragm on the diverter valve. Is it... [Read more]
Mend Heating, Home Heating Systems

How can I fix my Vaillant Ecotec Plus 428 boiler problem?

When the outside temperature is very cold, and the boiler fires up to heat domestic water and/or the central h... [Read more]

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