Oncore Specialist Heating

rang them several weeks ago to come out and sort a problem with 2 commercial gas boilers (which they had previously serviced in November 2023). 3 phone calls later over probably a 6 week period and promises to come out (never materialised), we rang again this morning and said they could come out after Easter (I assume this Easter, but by no means certain!). Poor. All the time, we are burning gas unnecessarily, incurring extra cost we can ill afford.

This follows a further issue with them when they effectively left us without heating while it took a month to source a part...several phone calls there.

I am left with the impression that they do not really care about after service and will not be using for further works.

Excellent service from Oncore. Knowledgeable, friendly, polite and reasonable prices. Fixed a couple of long standing problems in out Central Heating system and we no longer have huge airlocks in our radiators!

Used this outfit for a couple of years to service three oil boilers in our own property and rentals. I have no issues with the work they did during that time.
However, in April of this year our combi boiler broke down, leaving us with no heating or hot water, and when I called them they were unable to come and look at it until June. Yes, really, they couldn't fit me in for two months!
Obviously, I found another engineer and plumber (incidentally he got to fit a new boiler and bathroom for me, and is also servicing the other two now). I wouldn't normally give a negative review to a small, local business (I go out of my way to support locals) but after my (factual and polite) response to them trying to book an annual service via email this evening was dismissed out of hand I've changed my mind.
To be clear: they let me down very badly and I let it go. But when I reminded them of it, they didn't care.

I had a cp12 carried out at my rented property. Although the engineer came out quickly, paperwork still has not been produced for the job nearly 3 months later despite repeated calls. Will have to repeat the whole exercise now with someone new. CAnt recommend on this basis.

We used Oncore Heating to remove our old heating system and fit a new electric water immersion tank and timer. I would highly recommend them - very knowledgeable and reliable, punctual and excellent communication. If only everyone was like this!