This is simply the worst boiler I have had. Totally disappointed from the word go. I think they are relying on their old reputation but sadly the product is unreliable & expensive to repair along with all the expensive parts. After only 3 years i need an expansive vessel , pressure sensor. It's been depressurised 4 times in 3 years. Leaking pressure very common & error code F75 all requiring call outs. Total cost of repairs so far are £2540 Pathetic

Having lived with a fault on my boiler for some time, with acidic water from a failed condenser trap outlet connection, leaking into a bathroom wall and affecting plasterwork and painting, I'm not a happy bunny. The fault itself is not a big deal and should be easily fixable. However I've been treated apallingly, stood up twice for repair visits, with Vaillant coming up with any excuse possible for making me take time off to be home then not showing or doing the work. They quite clearly do not want to do guarantee repairs especially in inner London, and will find any excuse possible not to. Basically if the Vaillant guarantee is the decider in your boiler hunt go elsewhere.

I purchased my property with a brand new Vaillant ecoTEC Pro 24 Condensing Combi Gas Boiler installed. All went well for the first couple of years. Since then I have spent a fortune repairing it with constant F75 problems. In the end, my gas engineer, who actually rang Vaillant has strongly suggested I purchase a Worcester. Ladies and gentlemen, don't buy Vaillant if you value your hard earned cash!

We have had a Vaillaint eco TEC Pro for seven years. It has been a source of constant frustration, perpetually having F75 pressure problems and requiring urgent and expensive repair. I have reached the point where I am no longer prepared to pour good money after bad and will be replacing it. I will never purchase anything Vaillaint again and suggest you do likewise. The model was unfit for purpose when released on the unsuspecting public and the constant updates / revisions / new replacement parts indicate that Vaillant know it. Buy another brand!

Bolier from ecotec range a couple years old. Jan 2013 f75 error. Engineer found faulty pressure sensor and seized pump. Replaced both. Jan 2013 f75 error. Contacted Vaillant - they are totally disinterested and insist their boilers are quality. Home come this error is not in their standard manual? How come they themselves distributed a repair kit for this exact problem? Here is the kit description, just Google it: Vaillant Service Kit F75 0020023721. The absolute disgrace of it that they provide a part to resolve a design problem and refuse to help customers that have been hit by the issue. Have you tried their call out rates? Ridiculously high. For a boiler that costs £1200, they want £300+ a visit. So basically you get it repaired three times for the cost of a new boiler = OUTRAGEOUS. Alternative: Bite the bullet and have it replaced with a decent boiler.

Bought the ecoTEC pro 24 for a rented property in the belief that Vaillant would deliver reliability as well as efficiency. Boiler now 18 months old and just broken down for the third time. Vaillant utterly indifferent unless they can send out an engineer at eye watering cost. I located a local Vaillant specialist who was vastly more reasonable but indicated that this model appears to be defective but Vaillant will not help.
Only glimmer of hope may well be its scrap value!
Bought a Worcester Bosch for home 3 years ago, no problems at all with that to date.
Vaillant? never again!

i am a boiler breakdown and service engineer. ive had to go out to several 2 under two years old and one 11 months old all no heating but does have hot water your own conclusions

Bought the Vaillant Ecotec Pro 28 a year ago (Sep 2009), and just after the 12 months guarantee expired the boiler did not provide any hot water or heating. The service engineer advised that the sensor had gone and was a common problem with these type of boilers. After a few weeks lost the heating but had hot water, this time a diverter valve had to be replaced by an engineer. The diverter valve was cheap and nasty made from plastic.
I am not happy with this boiler and not sure what else i would have to replace.
I would recommend that Vaillant eco-tec pro 28 is not installed as it only comes with a one year warranty. Better to go for a reliable model that has quality internal parts and +2 years warranty

We had a Vaillant Eco Tec 24 installed. Initially we were very pleased but it broke down just after the 12 month guarantee expired (no hot water or heating)and we had to have a new circuit board. It is now in it's 3rd year and we have again had to call for an engineer for the same problem. I can see why they only give a 12 month guarantee. I would not recommend this boiler.

I had an Eco TEC Pro 24 boiler fitted in November 2007, by May 2008 this boiler had leaked 3 different times and completely ruined my kitchen. As it was still under warranty Valliant confirmed that this was a manufacturing fault with the boiler, and agreed to replace the boiler with a new one free of charge. this was fitted in November 2008, and has this month, (July 2010) again started to leak. The plumber has confirmed that it is the exact same problem, where the washers are not working properly and allowing the water to leak. i would never buy a valliant product again as the 2 boilers that i have had from them have failed to last any longer than 18 months, and have proceeded to ruin my kitchen in the process.

I had a new Vaillient condensing boiler installed on the recommendation of the plumber who installed it 10 months ago. Within this time it has broken down 5 times and as i write this review i am without the boiler again. i would definately not purchase another one. I run a bed and breakfast business and l am left with no hot water and no heating for my guests. I would not recommend anyone to purchase this boiler.