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My Vaillant EcoTEC 637 boiler won't come on. Half an hour.
Hi my Vaillant EcoTEC 637 boiler won't come on JA: I'll do all I can to help. How long have you been dealing with this? Customer: Half an hour JA: Do you plan on doing the work yourself? Customer: Not… read more
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Andrew Smith
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Vocational, Technical or Trade Scho
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I have a problem with a Vaillant EcoTec plus 430 which was
I have a problem with a Vaillant EcoTec plus 430 which was installed 2 years ago. The Central heating works fine however the hot water does not. It only comes on with the CH and not alone! I can't see any fault codes apart from S.30? … read more
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Andrew Smith
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Vocational, Technical or Trade Scho
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I have vaillant ecomax pro 18e and just today I drained it
I have vaillant ecomax pro 18e and just today I drained it out and refilling and taken all the air out when I turn it on it comes up with fault code 5 and flashing red light at the top. It happens str… read more
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I'm planning the wiring Vaillant 637 system boiler. There is
Hi - I'm planning the wiring for a Vaillant 637 system boiler. There is an RT terminal for the call to heat, but it's not clear how this can be separated for hot water and heating. I want to be able t… read more
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I have a vaillant eco max 646 when the underfloor heating comes
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Chamberlain Maintenance
Chamberlain Maintenance
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got a small leak from the base of the burner flange joint
Hi got a small leak from the base of the burner flange joint on a vaillant ecomax 828/2e, comes out as as a small amount of steam. boiler is 9 years old, is this likely to be the seal between the flan… read more
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andrew Im ***** *****, Ive have a Vaillant ecomax 835e boiler
andrew Im ***** *****, Ive have a Vaillant ecomax 835e boiler and wish to connect a polypipe 2zone master unit (PB2ZM RF)to it i would just like second opinion on elec connection… read more
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i have a Vaillant boiler, my hot water is ok but theres no
i have a Vaillant boiler, my hot water is ok but there's no heat coming to the radiators. The boiler doesn't have any fault code and is showing that its in radiator mode but nothings happening.… read more
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Hi I have a Vaillant ECOMAX boiler and a Vaillant VRT 340f
Hi I have a Vaillant ECOMAX 835/2e boiler and a Vaillant VRT 340f wireless thermostat the older one without the dial). Whilst I was away the batteries died and when I replaced them I just get a "ERR" … read more
canuck the pro
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i have a vaillant ecomax 824/2e combi which will fire for cen/heating
i have a vaillant ecomax 824/2e combi which will fire for cen/heating but only fire for hot water if the demand for cen/heating is also on. diverter valve has been changed but still the same problem e… read more
canuck the pro
canuck the pro
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We need a Potterton Regular boiler (not combi) that can be
We need a Potterton Regular boiler (not combi) that can be wall mounted in a cupboard with an output of 9.4-40.8kw/ 32,073-139,210 BTU ph, i.e. equivalent to Worcester Bosch Greenstar 40CDi regular - … read more
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I have a Vaillant Ecomax pro 18E which is showing the fault
I have a Vaillant Ecomax pro 18E which is showing the fault code F5. Speakingto a local central heating company they said that I could try resetting it by pressing the red "overheat stat" button. I ca… read more
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ive got a vaillant ecomax 828 combi, im not getting any hw
ive got a vaillant ecomax 828 combi, im not getting any hw other than for a few seconds when heating is on then runs cold, if i turn heating off and open hot tap the hw demand signal dosnt come on and… read more
Brian
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I have a Vaillant ecomax boiler. It is showing an error message
I have a Vaillant ecomax boiler. It is showing an error message for F.25. The pressure gauge is showing that there is too little pressure. How can I increase this? Thanks.… read more
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Rick Ridley
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30 years on the tools
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I have a Vaillant Ecomax 835E (approx. 5yrs old), never had
I have a Vaillant Ecomax 835E (approx. 5yrs old), never had a problem until now, but the central heating side is losing water out of the 'Auto air vent'. This is a small (looks like brass) part attach… read more
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Vocational, Technical or Trade Scho
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My vaillant ecomax 850 combi boiler just stopped working with
My vaillant ecomax 850 combi boiler just stopped working with error code s.36 which says "no heating demand from low voltage controls" any ideas as it was working fine upto now.… read more
Rick Ridley
Rick Ridley
Retired, well Semi,
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after i bled the radiators the pressure bar dropped. i dont
after i bled the radiators the pressure bar dropped. i dont know how to top boiler up. have watched the video but there are no pipes to connect a loop… read more
Andrew Smith
Andrew Smith
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I have a Vaillant Ecomax 835E combi boiler & the max pressure
I have a Vaillant Ecomax 835E combi boiler & the max pressure I can get to show on the boiler pressure gauge is 1 bar with the filling loop open. The filling loop is connected between the cold supply … read more
Andrew Smith
Andrew Smith
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Vocational, Technical or Trade Scho
4,024 satisfied customers
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