Vaillant EcoTEC Plus 831 Reviews

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Vaillant EcoTEC Plus 831
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Latest Reviews

“Worked well for four years, now junk. ”

★★★☆☆

written by Phillipsav75 on 07/03/2018

After four years of running smoothly, now it's starting to give one fault after another. Service every year. Wouldn't recommend it.

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“boiler”

★☆☆☆☆

written by tpGallagher135 on 15/11/2017

this is the most pathetic useless pile of **** ever. It is so complicated I can't get it to work. I hate it.

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“Ignition fault”

★★☆☆☆

written by muitnep on 24/09/2017

Just moved into house 9 months ago which came with a valliant ecotec plus 831. It came with a transferable 5 year warranty. It was transferred to my name and expires at the end of 2018. However, had an ignition fault and thought no problem, I'll just call them. How wrong was I. I was informed that the boiler should have been serviced in April and because it wasn't, It's no longer under warranty. I intimated that they never contacted me to arrange a date to have this done. There reply was, "we don't" contact you, It's up to you to contact us. I was with Scottish Gas in my last property. They would call once a year for the boiler service, and a mutual date was arranged. No problems. I asked to speak to somebody in authority to resolve this but there was no way this was going to happen. It's company policy, I was told. Useless customer services. Unflexible, unhelpful. Not a professional service at all, and it took me 30 minutes to actually speak to someone.

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“vailliant eco tec 5/5 ”

★★☆☆☆

written by KyleeSharpe109 on 16/03/2017

we bought this boiler 3 years ago and every thing was fine however all in the winter of 2016 its had nothing but pressure problems iv asked Valliant to fix the problem but there costumer service is 1 of the worst I have to deal with in my life, to the point were iv asked to speak to management who have not called back it taking 3 months of pressure problems with no fix in sight, if your thinking of buying from Valliant don't, people think that there the same boilers form years ago and they art, there costumer service is treble with no one finding my problem and the charge £90 for any call out, the staff have pleasant telephone manners but put the phone down when they get confused the waiting time can take upto 25min, and u still don't get the problem fixed, my biggest regret is not reading hese reviews before buying one, so save some money because these boilers arnt worth what they once were

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Angryman2000's Comment

Written on: 05/05/2017

I agree mine's only been in 18months and had to have 2 pumps fitted they came back with system needed flushing but it was done before when Boiler fitted now just been done again.wish I'd never heard Vaillant would not but one again junk

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“I bought a boiler from my local plumber shop and...”

★☆☆☆☆

written by Noah165 on 24/10/2016

I bought a boiler from my local plumber shop and valiant send a Ing and still the boiler don't work

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“Bad boiler manfacturer ”

★☆☆☆☆

written by 100Fisher on 07/10/2016

I am a Vaillant approved installer. I have installed many vaillant boilers over the past five years. They used to be good boilers, but recently I have had problems. Over the last 6 months I have had 3 boiler leaks straight after installation which that creates a bad impression with the customer of my work. Vaillant customer service (VAILLANT GROUP SERVICE) is so bad, it takes them so long to answer the phone. Then when you do finally get through there is no priority or urgency, they will not send somebody until the next day. The quality control is seriously lacking, these boilers should not be passed and making their way to customers.

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“3years in and perfect”

★★★★★

written by 150Fournier on 03/02/2016

Had boiler 3 years now. It fantastic, instant hot water when you turn on tap Lower gas bills than before Small compact yet so powerful Owner can adjust water temps themselves Almost silent running Love the anti frost check it does before firing up. (Sends slightly warm water round system to check and clear frost while warming the pipes) These are just a few things. Really has made a difference to my home. Now getting same boiler fitted in other family homes.

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“5 years and not one problem”

★★★★★

written by topjob on 30/09/2015

Installed on recommendation by our plumber ( as that is all he will install). Came with 5 year warranty providing serviced every year. Just had the 5 year service, a major one, compared to other services ( replaced seal etc). It has been faultless over the past 5 years and the plumber said we should get at least another 5 - 7 years no problem. Quiet, near instant hot water and runs without a problem.

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“Vaillant, used to be the best, now among the very worst.”

★☆☆☆☆

written by on 08/08/2015

I am an installer and like many other installers remember the old sine and other Vaillant boilers well. The best there ever was, made in Germany. Now they are made in China they are nothing but problems. The customer service is non existent. They fail from the beginning, but a common tale of woe is how they suspiciously fail very often just outside of warranty. I would never recommend one of these boilers as they cause endless customer relations issues. It really reflects badly on us. You could easily put in a cheap boiler that would go on for 10-15 years without a single problem, for the price of just one of the parts on these boilers. These really are the TVR of boilers... Expensive unreliable rubbish. (With a few flashy bells and whistles)

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“Best on market”

★★★★★

written by Bobtheboiler on 02/03/2015

Best boiler you can buy. Most of the faults people list are because of poor instalation, non flushing of system or leaks in system pipe work. If you use a Vaillant advanced installer you get a seven year no quibbles guarantee as long as the boiler is serviced. All servicing is from the front, all components can be accessed or removed easly if needed. The hot water is hot and the warm start saves gas and water.

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“5 years on from installation and faultless performance”

★★★★★

written by GenevieveFigueroa122 on 20/01/2015

I was concerned reading all the bad reviews on this boiler, i wondered if we were talking about the same boiler. I installed the boiler in place of a convectional open vented balance & flue boiler which was over 30 year old and complete with it's original Blue SMC pump.The only parts fitted to this old boiler was to replace the thermocouples every five years and a cost of around £5.00 each. With the installation of this Vaillant boiler I first flushed out the entire systems 22mm and 15mm heating pipework and each radiator to ensure the system was completely clean of any dirt. I installed a Spirovent dirt separator (magnetic) in the 2mm return pipeline just before entering the boiler.you would be surprised just how much is collected in this dirt trap over 12 months. I treated the system with fernox water treatment, and tested each year. I have a Vaillant wireless control system, which is easy to set up and use. The local water supply is only 50 ppm which also helps keeping the cold water and hot water supply from problems.I would expect major problems if this boiler was installed in a hard water area, but then all boiler would have the same problem of internal build up of lime scale. I have a 15mm / 1/2"Brass Cold Water Y strainer on the incoming water main to help prevent dirt from entering boiler. The local water pressure is 3 bar or approx. 45 psi so again ideal inlet water pressure. Maybe the problems that so many have reported are to due with the actual installation practices and locations rather than the boiler itself. I cannot say you would need to look at each case and pre-and-post installation practices. After having this boiler now for over 5 years without any problems whatsoever. i would like to provide a honest positive review (so far) of this product installed in the north cheshire area.

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“Boiler doesn't work Vaillant not interested ”

★☆☆☆☆

written by on 17/12/2014

We had a Vaillant ecotec boiler installed in January 2010. in September 2011 a new sensor was fitted in September a new water equaliser?? was fitted in October 2014 we were told the boiler leak was due to the heat exchanger and a new one required. I wrote to Vaillant to complain and say I did not believe the boiler was fit for purpose and would like them to replace the boiler. I received the response below. I am very sorry to learn of the problems that you have experienced. Please be assured that we manufacture some of the most reliable and efficient products on the market and the model that you have selected has on the whole proven very reliable in the field. Your appliance was supplied with a twelve month guarantee supported by our Group Service organisation in order to protect our customers against manufacturing defects. Outside of this period, our customers are offered the option of either taking out an extended warranty policy or enlisting the services of our, or a local engineer, on a chargeable basis as and when is necessary. Upon checking our records, I note that our engineers have never visited your property; therefore we have never seen your appliance ‘in-situ’ to undertake a firsthand inspection, we regret that we are unable to comment on any diagnosis or repair carried out by your installer. Regrettably on this occasion, we are not able to consider your request to have a replacement boiler. However if you would like to have one of our Group Service Engineers to inspect your appliance, this would be on a chargeable basis, as the appliance is now outside of the manufactures guarantee. To arrange this please contact our Service Centre where one of our operatives will be able to discuss the options available to you. Whilst I understand that the contents of this letter may be of some disappointment to you, I trust that the above clarifies our position and regret that we are unable to write more favourably on this occasion. Given that Vaillant are supposedly market leaders why would they want to risk their reputation for a few thousand pounds by not fitting a new boiler. I questioned the British Gas engineer about the quality of the work of the engineer (not british gas) who had installed the system and they said it was of a good standard. British Gas fixed the problem but I could NOT recommend a Vaillant boiler which FAILED SO MANY TIMES IN 4 YEARS. I would suggest you don't even consider Vaillant.

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“unreliable and expensive”

★★☆☆☆

written by Bernard448 on 25/11/2014

I bought the 831 in February 2013 and it ran well for the first year. In March 2014 it would not come on so the man who installed it came round and fiddled with the controls and got it going. He could not say what the problem was. In Sept 2014 it got too hot to touch the radiators despite the thermostat not calling for heat, but this problem put itself right the next day. On November 12th it failed to come on at all, the engineer called and fiddled around again. He got it going but was not able to state a specific cause. On Nov. 24th the same thing happened so today I have called Vaillant directly and they are sending someone to look tomorrow.My old boiler worked for 30 years without fault. The trouble with these is they are too complicated.I used to be an electronics engineer and always found German electronics not as good as Japanese. I wish I had seen this review page before I purchased the boiler, instead I went on the recommendation of the installer.

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“mix bag ”

★★★☆☆

written by TaniyahRose100 on 12/11/2014

I have 3 valiant boilers 2 in my rented properties and one in my home. The rented properties boilers seems to be working fine for at least year since installation. Howevever the boiler in house seems to give me endless problem with water pressure. Sometimes it is high sometime low .At least the valiant engineers seem to come and sort out the problem as it is under guarantee. Overall I do not think Valiant are any better than other cheaper brands. I have glowwarm and this seems to reliable. I have had potterton for 12 year and I got rid of it whist it was still working. Overall I would not recommend people paying over 30% more for valiant boilers.

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“Nothing but problems”

★☆☆☆☆

written by trebor566 on 09/11/2014

Had our boiler installed 3 years ago, within a few weeks the thermostate became faulty and wouldnt work so called out the installer who replaced it but said he's never had to replace one before as they never go wrong. 18 months later the timer started to lose time and wouldnt turn on heating at set times, this was a intermittiant fault so not constant and wpould work ok for months then suddenly paly up, but now its stopped working all together, have tried calling vaillant but they said parts only covered for 2 years and we are just over the 2 years so would have to pay £260 for them to fix the problem, also noticed that the boiler pressure keeps increasing and have had to release the pressure but it keeps going up after a couple of days, water is getting in but its not via the loop in filling system so can only mean the cylinder is faulty which will mean a very exspensive cost, all on a boiler thats less then 3 years old.........

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“Valliant guarantee worthless”

★☆☆☆☆

written by Burnie123 on 12/10/2014

Bought a valiant ecotec plus 831 just under two years ago this boiler has had an intermitent problem since new faulty water pressure switch once every two days the boiler will switch of with the message f22 low water when you speak to valiant they say boiler needs topped up useless just switch the power supply of then back on hey presto it ignites no top up required because the boiler wasn't serviced at year one they won't touch it beware read the small print avoid this manufacturer.

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Vsouthworth's Response to Burnie123's Review

Written on: 16/12/2014

I have exactly the same problems. 2months over due on the service and they won't touch it. Second time we've had to call out for pressure problems in 4years. Our old Worcester Bosch was always reliable. Wish I'd stuck with them now!

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“Broken after 6 days”

★☆☆☆☆

written by Janiya39 on 11/10/2014

Had it 6 days and got an error code 32 (flueing or fan apparently) and a whole heap of sludge over the worksurface. Had everything powerflushed and new pipes so, I await the solution to the issue. Not pleased after shifting a 40 year old gravity system that worked for this in order to sell my house more easily.

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“Very bad boiler”

★☆☆☆☆

written by 467McCall on 19/05/2014

This is a very bad boiler. It does not give warm water when you have a watersaving tap. Water has to flow very powerfully to get warm. This boiler wastes alot of water.

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“poor design on cold water shut off valve”

★★★☆☆

written by 160Pope on 27/02/2014

The cold water shut off valve which doubles up as a system filling device is a ballofix valve and constantly leaks after filling the boiler a couple of times.A very poor design. I had to replace the part within a short period of time.

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Stele_Hr's Comment

Written on: 13/03/2014

I had a same problem. Also was informed by the service guy that it happens quite often. Really shame that such a company (Vaillant) is not producing the valve that will work for more than a couple of fillings (considering its a simple type of valve normally functional for years in plumming...)

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“NOTHING BUT PRESSURE PROBLEMS”

★☆☆☆☆

written by on 22/02/2014

Had this boiler installed in 2012 after being advised to get it. Only 2 winters have gone by and have had problems with pressure. It started with loss of pressure over 3-4 days then within 1 day and then every morning it would lose all pressure. Vaillant Engineer has said its a leak and my plumber who has been 3 times can't find any leaked has said I would have signs of leaking which I haven't. Piggy in the middle! Why would it shut off so quickly if there was a leak? This problem will. It go away and vaiilant service and support do not offer solutions. I have read a number of other reviews with similar problems.

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Yeknas's Comment

Written on: 01/02/2015

I had a similar problem so my engineer fitted a new expansion vessel which cured it. vaillant dismiss my claim that the vessel is at fault but my engineer said that it couldn't be any other fault!

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Yeknas's Comment

Written on: 01/02/2015

I had a similar problem so my engineer fitted a new expansion vessel which cured it. vaillant dismiss my claim that the vessel is at fault but my engineer said that it couldn't be any other fault!

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Our helpful community of likeminded people will be happy to answer any questions that you have.

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Asked by Fcook81704 on 18th November 2019 Report this content
Is ecotec plus 831 compatible with v smart thermostat?

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Asked by Vlaw on 20th March 2019 Report this content
Boiler not working and F22 flashing on and off. What does this mean?

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Asked by JoBusby on 4th January 2017 Report this content
I am trying to establish the age of my Vaillant 831 boiler. Can you let me know please when this model of boiler was launched? Many thanks. 

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Asked by C.Murray on 10th March 2016 Report this content
Our new Vaillant Ecotec plus constantly cuts out due to low pressure. We had the the system flushed and magna clean added. Vaillant replaced the pressure sensor but still no joy.A few visits later a vaillant engineer could see water dripping from the heat exchanger so it was replaced. Two months later the pressure cuts the boiler out again and their so customer service say that a block has been put on our warranty meaning it has to be a problem with system & not the boiler.We now have to pay for an engineer to visit to prove that there is no problem on our system. We are wondering whether it's fair or legal to block our warranty and make us pay for a shoddy product?

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Asked by yeknas on 1st February 2015 Report this content
My boiler kept cutting out due to soaring pressure. After charging up the pressure it would work again until it went off the scale and so on. My engineer told me it needed a new expansion vessel.  He fitted one at great cost (he told me that the spares depot had dozens on the shelf because they fail so often) so I asked Vaillant if this was a common problem. They didn't answer my question so after the new one was fitted I sent the old one to them. They checked it, increased the pressure (which was at .7 bar) to 1 bar and ran it on a boiler. They said that there is nothing wrong with it. My engineer is upset - he said what else could it have been if the boiler now works 100% when all he did was change the expansion vessel. It has been regularly serviced in accordance with the manual including pressure checks on the vessel. Have you any idea what might be the explanation for all this?

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Asked by macklupi on 12th September 2014 Report this content
I have had my Vaillant Ecotec Plus Combi 831 for 7 years. I have had a few problems, but nothing really serious. What is the lifespan of these boilers? I have seen several reports with different results.

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Asked by Jenny52 on 7th April 2014 Report this content
My boiler has stopped working with an F62 error code. What does this mean and how can we get this fixed?

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