vaillant

We have an EcoFIT pure boiler and have not yet turned on our central heating at the main control but the display on our boiler shows the radiator and tap symbols on permanently. I've never paid much attention to the boiler display before so I'm not sure if it's always been like this, but from...

Hi All, Hope someone out there can help! We have a Vaillant ecotec plus 832 and nest thermostat. Tried putting the heating on this afternoon and isn't working at all, but have still got hot water. There is no fault code showing, and pressure is fine, 1.6. I put it into service mode and...

The story starts from when the energy prices started to rocket. I heard that some big savings could be made by installing Weather Compensation onto compatible boilers to smooth out fluctuations and modulate the boiler. My boiler is an ecoTEC Plus 418 open vented condensing boiler. My original...

Hi, I have a Vaillant Ecotec Exclusive with Green IQ 835, VRC700, weather composition, VR920, Ambisense VR50 and V51. I followed the advice of different posts, especially https://www.diynot.com/diy/threads/vaillant-system-gremlins.541433/ However, I still have several problems...

Hi, I have a Turbomax Pro 28E that is not turning on the heating, I am assuming that this is a wiring is as recently I removed an old thermostat receiver as when we moved into the house there were no controls for it, as such I tried to install a Nest E that I could not get to work. Since then...

I have a Nest gen 3 thermostat which is working great for the heating. I’d like it to control when the hot water is turned on but I’ve been told it’s not possible with my boiler. It seems crazy to keep a tank of hot water up to heat at all times. Does anyone know if it can be wired to only heat...

Hi, Only my 2nd post, but you were all so helpful with the first post I thought I'd have another go. I was talking previously about how I have a fairly new combi boiler (Vaillant Ecotec Plus 832) and also some solar PV and had the notion of fitting a HW cylinder as well. Since then, I've seen...

Really looking for some quick advice if possible. We have a Vaillant Ecotec Pro 28 R2 combi boiler, installed in late 2010. Model number is VUW GB 286/3-3. The boiler has generally been ok, and is regularly serviced. A few weeks ago, we started having a problem with the hot water. It would get...

Hi, I'm hoping from some sage advice, from you lovely people. I have a Valiant Ecotherm 832 Combi boiler that was put in about 4 years ago. I'd just moved in, and the place had an old oil boiler that sounded like a jet engine, and an uninsulated hot water tank that was taking up tons of room...

I've got Vaillant system with VRC470 control unit and control know is not responding. Since VRC470 is discontinued I am now considering replacin git with VRC720 Is a matter of simply removing VRC470 and disconnecting eBus and connecting VRC720 or much more complicated and professional installer...

My heat and hot water have stopped working at my new apartment. My boiler is showing the F.22 error and I understand that means I need to refill it with water but when I search how to do that I only find results about turning valves, which my boiler doesn't seem to have. Any help would be...

Hello! System as follows: Ecotec 46kw to heat exchanger 4 pumps - 3 heating zones and hw Tank is a Tempest solar 300 (plumbed for heating through boiler only) Controlled by Sensocomfort and 2 slaves Since having the system installed a year ago, I've had a return hot water leg and pump fitted...

Hello all. We have a Vaillant Ecotec plus 615 boiler. Our central heating system has an open tank in the attic and a hot water tank next to the boiler. There is a single three way motorised valve. My main concern is that the boiler regularly fires up even when there is no call for heat. As...

Hi All, Looking for some advice please! Not sure if this could be a DIY Home fix or if I need to call an engineer. I have a Vaillant Ecotec Plus 418, which appears fine on the hot water side and is able to maintain temperature however when I call for heating, initially it seems to go for a...

I have one of these which has worked well for years. Some time ago just about everything except for the pump and heat exchanger was replaced. Today I noticed the boiler needed topping up and I did so to around 1 bar. I then found the automatic air vent was dripping. I took it off and tried...

Hi, Any heating engineers able to help? Apologies if previously covered. I did try and search. Just arrived back from holiday and our boiler won't start up. The screen won't power up and is just continuously flashing 'loading'. It doesn't get as far as showing any error codes. It sounds like...

Hello, Hoping someone can help! Not sure what else to try. We have a Vaillant eco tec boiler and we also have a Vaillant auro stor water heater, but for the last two months all of our hot water is coming out Lukewarm. When we first moved in it worked perfectly and the water was super hot. Our...

Hi, Moved into a flat with a broken knob that controls the radiators. Estate agents were useless so was forced to do a self repair. Ordered new knobs and followed this procedure to the letter - Once I turned the boiler back on, it just says "0c" and no longer have hot water or heating...

Hi DIYnot, Firstly, i will apologize beforehand as my english is not perfect. I am from Denmark, seeking some guidance as i haven't managed to find a plumber or a boiler technician who can help me with my problem. I have had a bigger renovation project where i switched from radiators as a...

Our thermostat has a desired temperature of 20 degrees Celsius but it is turning on the heating, not matter what the temperature is. It is currently reading 26 degrees Celsius. We have tried turning the heating mode off but the thermostat turns back to auto immediately and resets the date as...