vaillant

Hi all.... I think it's possible to fit a Nest to my Vaillant 828 Turbomax boiler but I'm pretty confused about the whole thing really and there are so many different threads about doing it, I'm even more confused. I must say THIS thread is useful as it discusses fitting to a 824 boiler. Part...

Hi all, I have a Vaillant thermocompact 628E, the pressure was around 0.6 bar (It should be around 1.0) so I filled it from the filling loop to around the number 1. Afterwards, I've noticed when the rads come on, the pressure on the boiler goes over the red line after the number 3, causing the...

Hi, I am hoping someone here can help me, as this issue is driving me and my family mad,below are the facts. We live in a 5 bed detached house C. 2500sqft, we have 16 radiators in the house: 3 Towel rails, 7 down stairs, and 6 upstairs. The downstairs and upstairs radiators are all double...

Hello. I have a Turbomax Plus 824e boiler which has been limping along for some time. I am NOT GS registered but when it comes to things like replacing a screw in thermistor or topping up water pressure I am just about functional. I have no understanding or inclination to go inside the...

Hi, 1st post and I'm a bit of an amatuer (can do basic wiring) so be gentle... Basically I need to wire a 3rd generation Nest Heatlink to a Vaillant EcoTEC 937. Could someone please relate the Nest instructions to the boiler wiring diagram for me? I'm not sure which Nest instructions I should...

hello Looking for some advice; I have a vaillant eco tec plus 824 combi boiler. Last year the hot water started running cold after a few minutes. Heaton engineer cleaned the whole system, replaced the heat exchange and the pump. The pump seemed to do the trick. It's coming up to a year since it...

Hi all, newbie here. Less than a year ago I had a new Vaillant Ecotec boiler installed with a VFT350F controller. It connects via a VR65 control box to my existing honeywell gravity fed cylinder. It works well when programmed to come on, but I have never been able to get the 'cylinder boost'...

I have a Vaillant ecoTEC plus 630 system boiler supplying 4 central heating zones (3 radiator and one wet underfloor) and one unvented hot water cylinder. The system is controlled by a Heatmiser wiring centre linked wirelessly to 4 room thermostats/timers. When the heating is on and the hot...

I have a Vaillant 831 boiler which is not heating water. It is 4 years old and has had a diverter valve changed 2 years ago. It was working last night but this morning it has stopped heating the water. The central heating is working as it should. When a hot water tap is opened the flame symbol...

Hi there, Our boiler packed in a while back, and after 2 weeks of cold water, our landlord had a new boiler installed today. I was delighted to have the heating back, but I think there's something wrong with the boiler (likely how it was installed, I'm guessing). When I first looked at it...

Got a small problem with my Vaillant VRC 470f wireless weather compensating heating controller that is used with my Eco Tec Plus 937 boiler. Every now and then (a few to several times a week), the clock on the controller randomly resets its self as if new batteries were put in. This has lead to...

Hi Folks, Moved into a new house 3 weeks ago (not a new build). Previous owners had a Oil to Gas conversion done 2 years ago this week. Copper cylinder has been removed and a Vaillant ecoTEC plus gas combi boiler fitted. When we moved in 3 weeks ago the previous owners left a note saying "Water...

Hey all. I've been researching "smart" room stats and TRVs for my new Vaillant ecotec plus 835 boiler. The boiler is a brand new ERP compliant boiler. I've come across two products that appeal to me. Tado & Evohome. Both (Tado coming soon) offer "Smart" zoning using replacement TRVs without...

Am considering fitting the Vaillant weather compensator, the logic behind it makes sense to me but not sure if we have the right setup for it to work properly. Existing system is: 637 Plus system boiler UniStor cylinder Zone 1 - Radiators (upstairs & downstairs) with Honeywell room stat Zone 2...

Sorry to put another Hive install thread here, but although it's obvious where the live and neutral go, I'm having difficulty identifying where the other two need to be connected. I've Googled the hell out of it, but I think the 825 being fairly new doesn't help things. Help would be extremely...

hey all, I have a Vaillant setup in my home comprising of an EcoTec System Boiler (637) and a UniStor cylinder (310 litres) as well as a VRC 470 Weather Compensator. When the system was installed we were not able to get a high pressure output from the system as the pipes coming into the house...

Hey all, Apologies if this is a really silly question but I have has the VRC 470 installed with a Vaillant system boiler & Vaillant cylinder. Everything is working fine and I have learnt a lot about using the VRC 470 controller (which you need a master's degree in). However I am missing the...

Just sent this to their customer service dept: -- I've just had the unfortunate experience of becoming one of your service plan customers, and it's been all bad so far. Zero points for customer service. What happened? The inlet pipe on the heat exchanger of my Vaillant ecoTEC plus 624 boiler...

Hi All My 831 looks like it's given up. All working fine after 1:30hrs of use today, now all of a sudden it's completely dead, nothing on the display and no sign of life at all even after a power cycle. Power getting to the board ok, fuse ok on the board. Anything else I can check or is this...

Dear everyone, I have a Vaillant ecoTec Boiler in my bedroom and it is making really loud and disturbing noises throughout the day again and again. Sometimes it is relatively quiet, then it is really loud again. These episodes last from a couple of minutes to over an hour and happen any time...