WM Donnelly & Co Ltd Reviews 

Boiler service carried out by Stephen and Gordon. Friendly, polite, and efficient. Happy with the service!

Had my boiler serviced by Stephen and Gordon excellent service .

A good and timely service from Graham. The problems were solved and I am very glad.

Arrived when they said they would. The engineer, Graham, was down to earth and told me what the issue was in layman terms. Diagnosed and fixed the issue quickly and got my heating back on. Total hero!!

My Mum's home emergency insurance used this company as their emergency heating engineers. An engineer came to my Mum's house (in Inverness in December) and took the boiler apart, told her he needed to order parts and left. I called the insurer daily for a week chasing it up and was told the work was going to cost over £1000. There was some miscommunication between either this company or Swinton / AXA. Meanwhile my vulnerable 70 year old housebound Mum was in a freezing house and I was trying to call both Swinton and Donnellys several times a day chasing it up.

Eventually I was advised that the company didn't actually have full time coverage for Inverness and because it was a 2 person job it may take a while to organise. Then when I called again, they changed their mind and said they could do it with 1 person but were waiting for a senior person in the team to review it.

Eventually I called British Gas who came out on the same day. They then called me and said they were unable to touch the boiler as it was dismantled (by WM Donnelly engineer) and they had safety concerns. They had to return after hours to disconnect the gas from the boiler as they were so concerned about the safety.

Thankfully BG did come back the next day and repair the job. They charged £390, saying WM Donnelly had reported issues which were not faulty and had massively overquoted. The boiler is thankfully working now, thanks to British Gas.
No phone calls to apologise, never called back when they promised they would, over quoted by nearly 3x the cost and left a vulnerable 70 year old in a freezing house over winter for over a week.

The poor staff who answered the phone to me managed themselves very well - probably the only good thing about this company. They had to relay information which the engineer or a senior staff member should have spoken to me about. You should pay them more for dealing with your mistakes and incompetence.

I wouldn't trust them to do any work. Would give 0 stars if i could.

Gas engineer Stephen was efficient, polite and helpful. He made a perfect job of fitting the new pump and valves at my property in Edinburgh.

I had a very poor recent experience with WM Donnelly's in respect of a fault with my gas boiler. After contacting them on 22/12/25, I still had no heating or hot water 22 days later with no idea of when my heating and hot water would be restored. We had two contrary diagnoses from different engineers. The first diagnosed the fan as the fault. We waited over two weeks for the part and another engineer to call out and we were constantly on the phone during this period looking for updates, as my wife is disabled. To my dismay the engineer 100% ruled out the fan as an issue and suggested all the issues you see online such as the pump, PCB board etc, etc, without providing a definitive diagnosis. Following the engineers visit we phoned, messaged, emailed looking for information and I pulled the plug on our involvement with Donnelly's after 22 days. They seriously need to review their performance and customer service moving forward. We contacted another company and our heating and hot water was restored the next day.

Great service and explanation about the issue with the boiler. Very polite and helpful. Would recommend them. Thank you Stephen for explaining the reason why and how it was sorted.

Great service received today from Graeme and Marshall. New parts fitted to the boiler, quick and efficient turnaround.

I had a call out as part of home insurance policy today. Graeme and Hayden attended, very friendly, efficient, identified the problem quickly and provided me with an overview of the problem. They have fixed the problem, which was worrying me as boiler was leaking. Thanks guys for your help today and also advising that you’ll put a call out to see who can help with providing a service for my boiler.

Graham and Hayden repaired my boiler today and were spot on. Great lads and answered all my questions. Throughly efficient and friendly. Strongly recommend

It s now been us waiting for 3 days to get someone to come and still doesn’t show and offer a following date again to come after complaining about there service they even hang up the phone on us what kind of company is that
Leaving families in a 12 degrees house after phoning many times saying someone will be with us so much for 24h service
Got a call saying I m tired I can’t come today but someone will be with you the next morning and then nothing again
What a shame
A company to avoid

Outstanding service from Graham at WM Donnelly who responded promptly to our home emergency with no hot water/heating. Graham reassured us and talked us through everything before fixing the boiler. He went the extra mile to ensure we were happy before he left. Thank you!

Young competent electrician came out as agreed. However he wasn't familiar with my electrical heating controller and assured me that I would get a follow up report from the office. Nothing has happened since which is a week and a half . Nor had they responded to two earlier calls for information. Given the expensive call out charge, this lack of follow up service is very disappointing. I am unlikely to use this company again.

second to none with my boiler fit. Initially fitted no problem, however, it started loosing pressure, they tried all the obvious problems no luck, but they kept at until they found it. Nothing to their work it was pipes leaking between the plasterboard and outside wall. Put up with the problem for 5 yrs just kept topping it up, concrete floor so leaked outside to drain. It always a more difficult to find a fault not of your own making. The effort and reassurance of promising to find and if its was their problem it would be fixed no matter the cost. Its a long time that since i have experienced such professionalism, customer service and honesty, could not thank then enough. Beyond the highest recommendation

Sent by Insurance company and initially said fault was with my hive system. I disputed this as hive had been in place 14 months with no issues.They called Worcester for advice when on-site and then advised a report would be sent to insurance company .
That turned out to be that boiler was uneconomical to repair and poorly maintained .

It had been annually serviced by ovo and I was able to show this to insurance company who allowed me to organise my own engineer.
Boiler repaired at £369 by Worcester who have a fixed price repair offer - the issue was a replacement pump only.
Far from an uneconomical repair or poorly maintained unit .

After several visits and several new parts Graham contacted the manufacturer direct and organised a replacement boiler for us under the guarantee. He and his apprentice Aiden (maybe Hayden?) did a great job fitting the new boiler in a couple of hours. Graham really went out of his way to make sure that we would have a working boiler as soon as possible.

I called this company out to carry out an annual service to the heat pump and system.

Three weeks later a water flow error came up and I called them out again to do a repair. The same engineer came out, and after several different suggestions as to why the error was there, decided on the circulatory pump being broken. I asked him to recheck the filters but he refused saying that they were changed three weeks ago, so no need. My heat pump and system is only 18 months old. What was most disconcerting was the engineer looking at YouTube videos on his phone to try to find a solution.

However, I paid up front for a new pump and they were coming back in two days to install it.

The next morning I reset the heat pump in the hope that it would at least heat the hot water, and to my surprise the whole system started running normally, though a water flow error eventually came up again. Not happy with the supposed knowledge of their engineer, I called Donnellys and cancelled the repair and asked for a refund for the replacement pump.

After enquiring locally, I called another heat pump service company who came out, checked the filter and found it to be clogged. After cleaning and replacing the system is working fine. This company said there was no way the filter could have clogged up so much in 3 weeks, and I have my doubts now if the filter was ever cleaned and replaced by Donnellys. I have raised a formal complaint now.

Really poor and unprofessional service. Got messed around by the engineer constantly pushing out a time slot before moving to the next day well after my appointment time had passed.

Really pleased and impressed. Was quite a big job (35 year old boiler and oldest water tank they'd ever seen being replaced/removed, underfloor pipes, new radiator, flushed system). Came as planned, as priced, got it all done with no hassle, took everything away and - most importantly - the guys doing the work (thanks again Ian, Colin, Greg) were brilliant, so impressed.