vaillant

Hello, I have a vaillant boiler plus a hot water tank. I changed diverter valve 3 years ago because it did not move correctly. For a month now I have had a new problem with this diverter valve but slightly different and I can not find the cause. The valve works perfectly for central heating /...

Hi, We have a problem with our bath mixer tap. When you run the hot tap it does get hot for a bit but then goes lukewarm.. eventually hot again but due to the constant cycling between hot and lukewarm you can't run a hot bath. The central heating is off, the combi boiler is a Vaillant 835/2 E...

Hi all, After some help with my AquaPlus boiler. The boiler seems to be rising pressure on the gauge with the cold water service valve open as normal. I’ve closed the valve currently without use of the boiler as I’m getting a constant trickle of water through the outlet pipe to my driveway...

Hi All, I would like to replace a Honeywell room thermostat with a Drayton Wiser (I'll also be replacing the radiator valves later). Can I just confirm that: N & L stay the same 2nd L to A loop in the Honeywell should now be L to 1 in the Drayton 2 in the Drayton stays empty B in the Honeywell...

Hi All, I'm looking to wire up our Ecotec 937 plus with Opentherm and Evohome. So far I can source the VR33 module and have located the X31 interface on the PCB where this should be plugged in. Unfortunately it appears to have another connection already plugged into this serving the shift load...

Hi guys, I am thinking of getting my heating control a little bit smarter. Currently, I have "old" Salus RF thermostat with touch ring, but not connected to any hub, so I can't control it outside of my house. I was thinking about getting micro usb powered d1mini development board with relay...

hi all, I am thinking about replacing My Vailant VRC470 with a Vaillant vSmart controller but I am concerned that the WC I have at the moment using a sensor on the north face of my property is far more accurate than the general weather data derived from the internet that the vSmart uses. Am I...

Hi all, I'm wondering if someone can validate my wiring plan for my Nest + Vaillant Ecotec Plus boiler. It's an early Gen1 nest so only does the heating. The boiler is new and the installers were confused by the older Nest so at the moment the Heating and Hot Water both have to be on all the...

Evening, Having some trouble with my Vaillant Ecotec Plus 418, which is showing a F22 error code - low water pressure. Sadly there isn't a filling loop that allows me to repressurise it. Does anyone know how I might get around this? When I reset it, it starts up but then winds down quite...

Hi. Got a Vaillant ecoTEC pro 28 combi boiler which is about 10 years old. I had a plumber come today as our boiler continually turns off with a F.62 warning and red light, have to press the flame button with a cross on it to reset and get hot water back. The pressure also continually rises to...

Hey people small issue here on my Boiler. It’s a Vaillant Ecotec Pro 28, yesterday I drained the central heating system as I was having some pipe work done for a new towel rad in the bathroom. Also turned the mains water off and opened taps to get all the water out the pipes forgot to turn the...

Hi all, I believe we have a Vaillant Turbomax boiler although I'm unsure of the exact model number. The pressure has been low for a couple of years but only recently on a couple of occasions it has failed to fire up. I just pressed a button and it switched back on immediately. A gas safety...

Hello, having a bit of a 'mare with this one, so though I would seek out some help. I have a Vaillant ecotech pure installed recently (the version that fits in a cupboard) around 24kw I think. It seems to be using a huge amount of energy but never quite getting the rooms warm. I'm looking into...

I have been sent this picture of a Vaillant boiler where the pressure needle is down at the bottom. I advised my friend that it (obviously, doh!) needs re-filling and I superciliously (super-silly?) told my friend there should be something obvious on the underside... but - sadly - this picture...

I've got an issue with my Vaillant TURBOmax 828E combi boiler and I am hoping someone might be able to help me understand the likely cause of the problem before I call out an engineer. The hot water occasionally goes cold mid flow. I first noticed this when taking a shower, so I had a look at...

Hi, I am getting the F22 message on my Vaillant hr Solide boiler (VHR Netherlands version). The bar reading is low too at 0.5bar. So I would like to top it up. In the attached image, you can see there are two valves, black on the right attached to the yellow pipe (nothing attached on the...

Hi all, Just wandering is the nest compatible with the vaillant ecotec 838 plus combi boiler? And if so, does anyone have an appropriate link with how the wiring should be undertaken. The boiler is a brand new install with no current thermostat installed. Any help and advice would be largely...

Hi - hopefully someone will be able to help Have a Vaillant boiler which generally works fine but never seems to reach target radiator temp. Hot water supply to taps etc is fine. For example it’s about 1 degree outside today. Thermostat is set to 23 and triggering the boiler. Despite this the...

Firstly, I'm not going to attempt to do any rewiring my self - but I do have a Gas Safe plumber on the job currently (waiting for an internal pipe that is leaking a bit), and I want to get informed on our situation so when he comes back we can get it sorted asap. I have a Y plan heating setup...

Do the noises indicate any apparent problems like trapped air or pump issues? Drained and re-filled system last night to remove any trapped air but no joy as you can see; even if it's just on hot water to only heat the cylinder which is the closest 'radiator' to the boiler (also tried heating...