vaillant

Hi. I'm looking for a PCB for my Vaillant Ecotec Plus 424, GC 41 044 74. I don't want to get it wrong! Vaillant Part No: 0020237689 is listed as correct but suppliers are saying, NOW USE 0020273087. But this new one does not seem to list my boiler on supplier websites. Can anyone advise me...

I’ll try to keep this as short as possible! Basically the timer has died on my Ecotec plus 831 combi and rather than just replace it with similar I was thinking now maybe the time to go smart and get something that can help my heating system run more economically as we’re off grid so run off...

My Vaillant ecoTEC plus 618 display is always illuminated - previously it would go dark until I turned one of the temperature setting knobs. Not only that but now the temperature shown is flickering irregularly around the preset temperature (70°) and also flashing back to the outgoing...

We continue to have problems with our Vaillant boiler which was installed last July; the company who installed it have still not managed to get our heating controls working. We had months with uncontrollable heating, and for the last few weeks have not been able to turn it off at all! Yesterday...

Considering a refurbished pcb from a company named Adlink (wembley) - £40 12 month warranty. What are fellow members views & experiences on using refurbished pcb's? Looking to open the topic up & explore it in discussion - to learn something new. I'm hoping to educate myself. It will be a bg...

I have mounted a VR66 wiring centre in dual zone (switch in position 0) with two VRT350 thermostats. The heater is an Vaillant Ecotec Plus with combiboiler from october 2020. And I must say it works very well when one or both thermostats ask for heat. When there is no demand for heat the boiler...

Just had my boiler serviced, two hours after the engineer left, the boiler suddenly started making a very very loud humming/buzzing noise. The vibration went through the house and through me. It sounded like a truck was about to come in the patio doors. The experience lasted 2 minutes and then...

Hi all, I have read through as many similar posts as I can in regards to my dilemma, I couldn't see anything that was similar to mine. I have a Vaillant ecotec plus 837 with a Honeywell BDR91 and CM927. The vaillant is connected by a UK mains plug as opposed to it being hardwired with a 3amp...

We're looking at replacing our ageing combi boiler and are weighing up whether it's worth getting a storage combi versus a conventional combi. (We've considered a system boiler and cylinder, but we don't think we can make it work from a space perspective; in any event, a combi should be...

Hi, it sounds like a bee, happens intermittently with rads on only, goes off when you open hw tap Video - https://drive.google.com/file/d/1eGBfQHfTCeM7s8z51rV2yhXCyRC2AppK/view?usp=sharing Thanks

New Vaillant Ecotec pro 30 boiler installed in August, worked OK for two months then the pressure suddenly dropped. Tried to raise it but it shot right up and made a very loud constant noise that we could only stop by turning water completely off. So no heating or water at all for a few days...

Hi I have a Vaillant vcw 242 eh, the hot water is working well on it and is getting up to a good temperature to flow rate. The problem i am having is with the central heating. When the thermostat is clicked on it fires up, but if you click it down and then click it back on again the boiler...

i have a SALUS RT500RF hand held controller and a VAILLANT combi-boiler. i recently had to change the batteries in the hand held unit and since then it doesn't actually control the boiler. both red and green lights are on on the receiver unit but even if the flame is showing on the controller...

Hi All, I have got question on installation Nest Heat link to boiler. I have got Vaillant Ecotec Pro28. I currently have Honeywell thermostat and receiver (wiring) has been shown on picture attached. Should I do exactly the same as on the picture above ie: N to N L to L With yellow/ green cable...

Hello, Recently moved to a new rental place. The Vaillant EcoTec Pro 24 boiler was empty (I think for quite a while), refilled it via the loop to 1.5 bar & bled the radiators to remove any air. One of the valves (the smaller handle) in the filling loops leaks very slightly but I don't think...

I will try give as much info as possible to help. Vaillant ecotec 24. Problem started a few weeks ago with F75 error code and having to keep resetting the system to get hot water to work. I changed the pressure sensor and sorted out the F75 error and the pressure now rises as it should when the...

Hello, Recently moved into a new rental place, struggling with the heating equipment. I'm not a plumber or heating expert, did the troubleshoot I could think of with no success so seeking help from more knowledgeable people here. Equipment: Vaillant EcoTec Pro 24 boiler plus Drayton Digistat+...

I’ve recently had a nest 3rd gen thermostat installed into this boiler, seemed nifty at the time however, this replaced no previous thermostat (we used to manually switch it on and off and there’s a panel at the front with a analog timer). So the nest 3rd gen replaced this. It’s been a few...

Hi All, Just to say I am a end user not plumber. Have a problem with the hot water. It intermitantly runs tepid. About 3 months ago I had the Diverter valve changed as I had no hot water at all. Since then I have had tepid water intermittently. I happens mostley first thing in the morning. The...

Hi All, I've tried to look for this question in the forums and some are close but don't seem to be exactly what I have. I am trying to wire a bh3000 thermostat to an 831 vaillant boiler. I have two wires from the wall (brown and blue) + earth. I have connected the two wires from the...