vaillant

My current set up is Vaillant ecoTEC plus 832 combi boiler, with a Vaillant Sensohome Vrt380F to control the heating. Ideally I would like to get this updated to allow me to manage the heating away from my home through an App. I've been looking at the Vaillant Internet Gateway as a means for...

Hello, I've bought the thermostat in the picture and have connected the 3 wires from my old thermostat. The thermostat turned on but it won't turn on the boiler. I have boiler board photo attached. Please help.

My hot water stopped working and I noticed the pressure on my VAILLANT TURBOMAX boiler had dropped to zero. I increased the pressure to 1.5 by opening the Filling Loop valve, but after I closed the valve, the pressure kept on rising getting very close to the red area. I bled a radiator and it...

Hi everyone, We’re new tenants in an apartment that has a Vaillant ecoTEC plus VUW 25/26CS/1-5 boiler responsible for water heating and the central heating system. We’ve noticed that every time the boiler starts heating, there is a loud banging or rattling noise. When this happens, the cover of...

TLDR OK, this is not so dozy a question - and the background is below for people who want to know why I am asking this, but bottom line: What is the technical reason for anti-cycling lockouts? Does constant firing use too much gas, wear something out - what? Put it another way: If there was...

Hi All, I am curious to know if anyone can protect with some information related to the Vaillant AroTherm plus VWZ AI controller? Does anyone have any suggestions to improve performance here??? EG: I noticed that the DHW pump speed is set to 100% by default. Is this necessary??? Has anyone...

How do I offset room temperature to a vcr720 that's reading high when compared to a calibrated temp sensor

Hi All, I was wondering if someone can explain to me how you wire up a Vaillant AroTherm Plus with a SensoNET 921 and sensoComfort 720F/2. I just purchased an accessory for the SensoNET 921 that is used instead of a mains plug adapter. (See image below) As referred to in the SensoNet manual...

Hi My TurboMax 828 is 23 yrs old and the diverter valve has been replaced three times in the last three years. So now thinking of replacing the boiler with another Vaillant. Would prefer to keep existing flue, if it is still in good condition. Would anyone know if the ecoTEC plus or ecoFIT...

I'd like some advice on what I should connect to my new boiler please I'm getting a Vaillant EcoTec Plus 940 installed and I don't think my plumber would mind me saying that he's a great plumber and corgi engineer but he hates all that smart boll-ox. I currently have a Nest connected to the...

Hi Everyone, I was wondering if anyone knows of a way to shorten a flexible stainless steel flex hose for a Vaillant ASHP? I have previously purchased flex connection hoses from Vaillant that could be shortened using a circlip, but it would appear that they have changed their manufacturing...

I have the 2023 release Vaillant Ecotec Plus 832 installed (touch screen display at front). It was installed with a Wolseley Centre wireless controller however the radiators were taking 50 minutes to 1 hour to come up to the target flow rate of 60 degrees and after much misdirection by Vaillant...

Hi there. We have a Vaillant system boiler which has recently had a new expansion vessel and PRV. However, we still have some kind of pressure issue. The pressure remains pretty constant with daily checks and similar usage patterns (typically 1.4 or 1.5 bar) for about 4 weeks, but then suddenly...

Hi Everyone, Does anyone know if there is a difference between the Vaillant AroTherm Plus 7k sold in the U.K. vs the EU model? I can see that there’s a huge price difference with items such as the VRC 720 F wireless controller and that generally speaking the AroTherm Plus is sold separately to...

Hi All, I am considering installing a Vaillant Arotherm Plus 7kw heatpump in my house. Does anyone know if the Arotherm Plus 7Kw includes a controller unit (wiring center)? I previously lived in Denmark and Vaillant supplied a seperate VWZ AI Controller and this could be paired with a Vaillant...

I recently had a new 2023 Vaillant ecoTec plus 630 (30kW) system boiler installed along with a Low Loss Header (LLH) in my house. I have 21 rads in the house and a room with UFH. The LLH was introduced as I was finding (before the LLH was fitted) that my old boiler (Vaillant heat-only boiler)...

Hi all I noticed water dripping from the bottom of my Vaillant combi boiler and found the source to be the base of the flue where it connects to the boiler (as in the photo below). I've sent pictures to the boiler installer but he's ghosting me. Is this something I can fix? Tighten up the...

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I have have a Vailant EcoTec Plus 937 boiler that is about 10 years old. During it's first few years, I had the VRC700f control with the wireless outdoor temperature sensor, that modulates the flow temperature based on the outside temperature. Unfortunately the outside weather temperature...

I’ve just had a full central heating setup installed into my ‘older’ property. Mostly, everything feels fine (and warm). The one adverse symptom is that one (high capacity) radiator in the living room occasionally but regularly ‘tinkles’. I’ve repeatedly bled the system but this doesn’t alter...