Central Heating System Repair

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Central Heating System Engineers

When central heating problems crop up, particularly in the autumn and winter, you need an engineer on site ASAP. It doesn’t matter whether it’s your boiler, radiators, or pipework that’s causing a problem… it needs fixing fast. At Grand Union Plumbing & Heating, we understand how important it is for central heating system repair work to be carried out quickly and effectively, and we’re very familiar with the many problems that can arise.

How Do I Book?

To book an appointment please give Mitch a call on 01908 034 194 or press the Book Appointment button below.

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Central Heating System Water Tank Repair
Central Heating System Boiler Repair

Common Central Heating System Repair Examples

Radiators have cold patches

The repair required is often suggested by where the cold patch is. If your radiator is cold at the top, this is likely to be trapped air and the radiator needs bleeding. However, if it is cold in the middle or at the bottom, this is often caused by a build up of scale or rust etc. or something blocking the flow of water; either way might require flushing through. It’s worth noting that if your radiators on one floor are hot, but on another floor are cold, this again suggests a blockage. However, if they’re cold on the top floor, this could also be to do with boiler pressure, and if they’re cold on the bottom floor, this could be to do with the pump.

Boiler problems

Typical boiler issues include:

  • You have hot water but no heating
  • You have heating but no hot water
  • You have neither heat nor hot water
  • Your boiler is leaking
  • Your boiler is making strange noises such as bubbling, hissing, or banging
  • Your boiler won’t ignite
  • Your boiler switches off too soon
  • Your boiler pressure is low

Leaking pipes

When you have a leaking pipe, sometimes it is as simple as tightening something up. However, that sounds easier than it can be in reality, for joints etc. get stuck and you risk damaging the pipework. Often, additional sealant is required as well or the leaky pipe actually needs to be replaced. So unless you’re totally confident in what you’re doing, it’s best to give us a ring so we can have a look.

Water tank overflow problems

System and regular boilers get their water from a tank, usually stored in the loft. If the ballcock becomes faulty or jams, this can cause an overflow and may mean the ballcock needs replacing.

If your property is in or around Milton Keynes and you have a problem with your central heating system, please just give us a call on 01908 034194. It’s always best to get it checked out sooner rather than later… before the cold weather sets in!

Any questions?

If you are looking for a heating engineer within the Milton Keynes area for anything from boiler installations to fixing a tap, or would like some friendly advice please call Mitch directly today on 01908 034194

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Areas we cover

  • Aylesbury
  • Bedford
  • Leighton Buzzard
  • Northampton
  • Olney
  • Towcester
  • Woburn Sands
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What Our Customers Say

It’s not very often that you find a quality tradesperson who is reliable, honest, and competitive on his pricing. Mitch has done a number of jobs in our house, including installing a new boiler, water tank and radiators. All to a brilliant standard. I will happily recommend Mitch and Grand Union Plumbing!


Very happy with the service I have received, the service was prompt, efficient and professional. Yes, I would use again.

Clare Price

Amazing work and attention to detail and Mitch is a great person to work with

Made in Sud Pizzeria

Very friendly service. On-time and very professional. Also very careful about safety during the current COVID outbreak.

Andrew Robinson

Mitch is super friendly and professional, happy to give advice and he’s done loads of work for me.

G Man

Highly recommended, would use again

Mandi Willett

Highly recommend Mitch. Polite, professional, on time. Great service.

Susan B

Mitch replaced our boiler and ran new pipework, plus relocated some radiators. He did a brilliant job and I wouldn’t hesitate to recommend him! He was punctual, helpful and polite.

Suzanne Simmons

I had a new bathroom fitted by Mitch. He was absolutely excellent. He was polite, tidy and did an exceptional job. Reasonably priced too. 100% recommend.


Excellent service. I contacted them for a boiler repair. They responded within hours with prices. Once they confirmed part availability, they fitted within days.  Very efficient, great service and I liked their clear pricing.

Definitely recommend & I will be booking my annual service with them in future.

Well done!

Sheena Mac

Grand Union replaced our central heating system and in doing so we requested that it be relocated from the airing cupboard into the Garage.  The work was completed professionally & on time with the relocated pipework like a work of art, very neat and orderly.  I would have no issue with recommending Grand Union, and will certainly be using them for all our gas & plumbing needs.


I have called Mitch out twice since moving into our new house a month ago. Both times he has managed to fit in an appointment fairly quickly to resolve our issues. He has been professional and friendly, offering advice on other issues that I have seen. I would definitely recommend his services.

Simon Edwards

We have used Grand Union Plumbing several times as we had a really tricky fault. We found Mitch to be really excellent. Very happy to recommend, 10/10

Annette McDade

Called Mitch out on very short notice, extremely reliable and great rates, would highly recommend Grand Union Plumbing and Heating. Also provided advice with other queries aside from the job at hand- with no reluctance. Great service, thank you for your hard work and honesty Mitch.

Dushan Gnanakumar
Great service, polite, attention to detail. Would highly recommend.
Ajvinder Dhatt
Had a leak that needed fixing asap and Mitch gave me advice over the phone to deal with it until he could get to me, then came out within the hour on a weekend! Would highly recommend
Hannah Manners
Great company would highly recommend for any heating & plumbing issues
Terry Adolpho

Definitely recommend these guys. Had a job done by them and they wasted no time to get it done and made sure I was completely happy before any payments. Nowadays companies just want to rush and take your money. Big thumps up

Tevaugh Grant
We always use Grand Union for serving and any other unforseen problems. The service and professionalism is 1st class. Would definitely recommend!!
Stephanie Horne
A great company to do business with… I used them recently for an emergency with a domestic heating system which was rectified very efficiently. A second problem (some months later) and there was no decision to make, called them and they sorted it in no time with minimum fuss, mess and very reasonably priced.
Trevor Gordon

Have used Grand Union twice now. They are very quick to respond to enquiries, reasonably priced, tidy workers and very friendly. I can’t fault them. Definitely my go to guys now for any plumbing needs.
Highly recommended

Emma Verrall
Great service from Mitch. Have used a few times for boiler service, repairs and outdoor tap installation. Always very prompt service, turns up on time and reasonable prices. Would definitely recommend!
Jon Hood

I found Grand Union Plumbing through the Gas Safe Register. I had a boiler service and gas safety certificate. Mitchell was very professional and the prices were very reasonable. I would definitely recommend and use again.

Rebecca Hughes
Mitch was very helpful when fitting my new boiler – he was very fair about price and I couldn’t recommend Mitch enough. Thanks Mitch!
Reece Hussain


Use our calendar appointment request form and we will confirm back to you as soon as we can! We look forward to hearing from you.

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If you have any questions regarding our services, would like to arrange a quotation or would like to book a call out please contact us using the form below. You can also request an appointment through our contact form. We look forward to hearing from you!