Gaswise Services Ltd

Availability: Emergency call-outs

4.1(56)King's Lynn • MCS • RECC • OFTEC

About

Gaswise Services Ltd is a heating engineer based in King's Lynn, trading since 1980. They take on domestic and commercial work, and they also go out on emergency callouts.

Reviews

4.1

Gaswise Services Ltd is described by several reviewers as friendly and helpful, and some praise its engineers for being punctual, polite and tidy. Reviewers also report quick responses to heating faults, including one whose heating was running again within 24 hours and another seen the next day after calling. One customer had a new boiler fitted and praised the follow-up explanation of a smart thermostat, while another said a warm air system was replaced with a system suited to the house and left clean and tidy. Criticism includes one reviewer who found two engineers unprofessional in their behaviour at home, and others who report poor communication, a messy repair after a leak, and a long wait for a quote that never came.

DianeOct 2026 · Google

Thankyou so much Mark & Alfie GASWISE KINGS LYNN for all your hard work removing our old boiler from the loft & fitting a new boiler in our kitchen.We found you professional,polite,punctual & kept us informed from beginning to end.We 100% recommend GASWISE KINGS LYNN.Sincere thankyou for all your hard work.Brian & Diane Blyth.

Jane D.Jan 2026 · Google

We recently had a new boiler installed, and while the work itself was completed, the behaviour of the two young engineers (Henry and Owen) was extremely unprofessional. Throughout the visit, they were loudly singing, laughing, and joking around to the point where it felt more like they were socialising rather than working in a customer’s home. This was particularly disruptive as I work from home. Their overall attitude made me feel uncomfortable in my own home. At times, it genuinely felt as though I, as the homeowner, was somehow invading their space and being an inconvenience, which is completely unacceptable when you are having a service done. The toilet was used for a number 2 without asking. While I understand that people may need to use the bathroom during a job, it’s basic courtesy to ask the homeowner first. At one point, the electricity was turned off without any warning, again causing disruption while I was working. One of the engineers also went into rooms to bleed the radiators without informing us beforehand. Homeowners should always be informed before engineers enter private rooms, as you don’t know who may be inside. Most concerning of all, something was burned on our cooker. We found burn marks and burn paper traces, we checked our security camera footage, which appears to show a burnt power tool battery and cables being disposed at the front of the house. This represents a serious fire hazard. What is even more unacceptable is that we were not informed at all. Had we not noticed the damage and checked our cameras, we would never have known this had happened. Overall, the lack of communication, consideration, and professionalism made the experience very uncomfortable. I would expect much better conduct from engineers working in someone’s home. Response to company’s reply: Thank you for your response. I appreciate the apology and the acknowledgment of the concerns raised. I would, however, like to add one final observation. As relatively young engineers, those attending the job are likely among the more recently trained and inducted members of the company. As such, their conduct inevitably reflects the standards, expectations, and behaviours that are currently being demonstrated and reinforced within the business. I also feel it is important to add that after reviewing our security camera footage today, there was an occasion where the engineers were laughing loudly to the extent that I had to remind them that I work from home. Shortly afterwards, when I was no longer present, the footage clearly captures a comment being made referring to me as a “weirdo.” For clarity, these are not hidden cameras; they are clearly visible within the property. It is therefore particularly concerning and disappointing that such behaviour occurred despite the cameras being in plain sight. While this behaviour may not align with the values the company believes it upholds, it does influence how those values are experienced by customers in practice and shapes how the company is perceived. I hope this feedback is taken constructively and used not only to address individual behaviour, but also to review training, supervision, and the standards being modelled to newer staff, especially when working in customers’ homes.

Patricia H.Nov 2025 · Google

Always helpful and a great service

Mark L.Oct 2024 · Google

Excellent replacement, installation and service. The new boiler is awesome even the spare bedroom is warm! The new smart thermostat is great. We are very happy! Gaswise was recommended by a neighbour when the main panel failed on our very old and obsolete boiler. Chris came over, looked at the boiler, did some checks about a replacement main panel (I already knew that it wasn't happening) and worked out a quote. They sent 2 engineers and then the electrician. Chris followed up and explained how to use the thermostat. They are not the cheapest but using Gaswise has been terrific value for money.

Chris A.Jan 2024 · Google