Vaillant & Worcester Bosch Fixed Price Boiler Repairs From £195

Thames Boilers area a local boiler repair company who specialise in repairing Vaillant & Worcester Bosch boilers.

  • No fix? Low fee. If we can't fix your boiler, you only pay a small fee for the engineer's visit.
  • 1 year guarantee on any new parts
  • All major credit & debit cards accepted


Check what our customers say about us

What Does Your Fixed Price Boiler Repair Include?


  • All callouts and labour to fix one fault on your boiler 
  • FREE Standard Boiler Service (Value: £80)  
  • FREE Water Quality Check & Report (Value: £89)
  • A 1 year guarantee on any parts fitted
  • No fix? Low fee. If we can't fix your boiler, you only pay a small fee for the engineer's visit.

Does not include

  • Parts needed to fix your boiler (NOT INCLUDED). You will need to pay for any parts your boiler needs separately as an extra cost.
  • (If your boiler needs parts, we can get them for you quickly, cheaper than retail price, guaranteed!)
  • Boilers over 15 years old
  • LPG, Oil, Electric, Commercial, Back Boilers, and HIU's.
  • Faults caused by incorrect installation, sludge or scale.
  • Replacing the boiler's main heat exchanger

Questions & Answers

How soon can you fix my boiler?

It depends on the time of year and the weather.

In the warmer months, we can usually attend on the same or next day, if it's a working day. 

In the colder months, because it's so busy, you may need to wait a few days for an appointment. 

Can you fix my type of boiler?

We can fix any boiler except oil boilers, LPG boilers, boilers rated over 70kW or those considered beyond economical repair. Other than that, we'll do our best to fix it for you.

Just bear in mind that we can't fix some boilers under the fixed price repair offer. These will be charged at an hourly rate plus materials. You can see which boilers are covered here. 

Do I have to pay a callout fee?

You won't pay a callout fee or a minimum charge if your boiler is eligible for a fixed fee boiler repair. You can check if your boiler is eligible here.

If your boiler isn't eligible for a fixed fee boiler repair, you will need to pay a minimum charge of 1 hour's labour if you would like an engineer to come out. You can view our hourly rates here.

What if I need a new boiler?

Sometimes boilers are considered beyond economical repair. This means that either the part needed to fix it is no longer available - or the cost of repairing it is approaching the cost of a replacement boiler.

If this is the case, we will let you know as soon as possible and explain why you need a new boiler. We'll give you a full written quote for a new boiler and leave it up to you to decide what to do next.

If you decide to use us to replace your boiler, we'll aim to prioritise you to get your new boiler fitted within 48 hours.

Are you worried you may need a new boiler, but don't know how much it'll cost? Go to our new boiler page and get a free online quote here. It'll give you a rough idea of the cost if the worst happens.

Our Promise To You

As a boiler repair customer, we promise to give you the following benefits:

Free Boiler Service

It's not enough to just fix your boiler. We want to make sure you're safe and the boiler's working properly. That's why you get a free Standard Boiler Service when we repair your boiler.

98% Fix Rate

If your boiler goes wrong, you won't be without heating or hot water for long. Most faults are fixed on the first visit - and if your boiler needs parts, we can usually get them the next day.

Unlimited Callouts

If you qualify for a fixed price repair, your price includes as many call outs as needed to fix the problem with your boiler.

Call-Outs & Labour Included

Fixed price repairs include all call-outs and labour to fix the problem with your boiler.

No Hidden Charges

All our prices are clear and upfront with no sneaky hidden charges or excesses. 

UK Helpline

When you ring to book an engineer, you'll get through to a charming person right here in the UK. Not someone thousands of miles away.