What Constitutes an Emergency Call Out for Boiler Repair?

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It’s a good question because let’s face it, if your boiler is working but just isn’t working properly it still feels like an emergency to you. However, it most certainly is an emergency if you experience a full boiler breakdown and have no hot water or heating. And at a Grand Union Plumbing & Heating we understand that even if that’s not the case… you still want a fast response.

So what counts as an emergency?

An emergency call out for boiler repair is warranted when it’s a matter of health and safety for a household. If you experience any of the following, you need an experienced and appropriately qualified engineer on site ASAP: when you have no hot water or heating, particularly if you have young children or it’s during the winter; when you have to stop using it because your carbon monoxide monitor has alerted you to a problem; or, of course, if you can smell gas.

However, with that said, we also understand that intermittent problems can create difficulties for a household. Thus we always aim to be on site as soon as we can, unless every engineer is out tackling an emergency; you get what we’re saying, eh? So even if it’s just a problem that happens now and again… we know it still needs prompt attention.

Do I need a fully qualified heating engineer for an emergency boiler repair?

The short answer is yes, so we recommend you ensure the person who’s going to look at your boiler is a Gas Safe registered engineer, or if your boiler uses oil, that they are an OFTEC technician.

Boiler Wire Repair Close Up

How quickly will they turn up?

If it’s an emergency repair, they will ideally be with you as soon as possible, with the aim of getting you back up and running within 24 hours. Though bear in mind certain problems can take a bit longer, for example if your boiler requires parts that need to be ordered in.

Common problems requiring an experienced engineer

  • Air in the system
  • Low boiler pressure
  • Broken thermostat
  • Fan failure
  • Diverter valve failure

Symptoms suggesting there is a problem

All sorts of things can occur that suggest you need a qualified boiler engineer to have a look, even if it’s not an emergency. For example:

  • You can smell gas (this is an emergency, call 0800 111 999)
  • The water is hot but you don’t have any heating
  • You have heating but no hot water in your taps
  • You have neither hot water nor heating
  • Your boiler is leaking
  • Your boiler is making odd noises
  • Your boiler won’t ignite
  • Your boiler switches off too soon or keeps switching off

If you’re experiencing any of these symptoms then we advise you to call a Gas Safe engineer as soon as possible. A stitch in time saves nine, as they say, for with a bit of TLC your boiler could be fixed and up and running again quickly, whereas if you leave it too long and you may need a full replacement.

If you’re worried about your boiler, you can always give us a ring on  01908 034194. We’ll be delighted to help if we can.

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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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.

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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.

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

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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


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