Keston Celsius 25 Modulating Domestic Condensing Boiler

This boiler is over-complicated and is not engineered very well, hence is not reliable. I have installed one, and been called back several times- all due to production quality issues including a leak due to the screws on the heat exchanger being loose. Keston came out to this and claimed to have fitted a new exchanger (I didn't reveal my findings) but they certainly did not. Badly crimped wires on the thermistors was another fun item. The tech support doesn't seem to know anything about these units, and the engineers sent to fault find are little better than chimps- they certainly have no electronic fault finding abilities. Now I have a call-out because it fires up at random even with the controls off. I can't recommend these units at all: go for a Glowworm!

Since moving into our house 3 years ago this month, we have had a problem with the boiler every winter. We have replaced the circuit boards (£150 + labour) and the ignition electrode. Ive lost count of the money we have spent on it and it still doesn't work. Our experienced plumber (he's had the misfortune to have worked of this model before) has spent the last 3 weeks trying to get the pig working, but to no avail. I have since found receipts from the previous tenants showing that they replaced the circuit board the month we moved in and had a history of it breaking down and needing other elements replaced - including another board and the ignition electrode. We've ...

There was a Celcius 25 in the property we rent and it failed. It had a number of boards replaced before the heat exchanger failed and it was game over.

The landlord has replaced it with a Keston Qudos and it took over a week for an enginner to visit when it was installed as it kept shutting down and in the week since it was finally got up and running it has blown a fuse twice and we are awaiting a visit from an engineer.

All told we have had the past six and a half weeks with no heating.

If it was my house I'd avoid Keston at all costs.