Electrical Work Confirmed Correct - Fault Found Elsewhere
UPDATE:
I am updating my previous low rating. The initial heating issue (radiators coming on when only the water was on, on the NEST) was wrongly attributed to the electrical installation, according to Andy, who
had the system checked again yesterday, and confirmed the installer's electrical work on the Nest has been correct.
Furthermore, Andy suggested that the ongoing problem was likely a plumbing bypass/short circuit, which is the issue we are now pursuing with the boiler installer.
My apologies for the initial confusion and the low rating based on the incorrect initial diagnosis. The installer did a great job with the Nest, and Andy's professional advice helped us correctly diagnose the underlying plumbing fault, which will now hopefully help us solve the problem we had for years. Thanks Andy!
I’m extremely disappointed with this company’s service. They installed my Nest thermostat in November 2021, and ever since, my central heating radiators have come on whenever the hot water is used. After several independent engineers and unnecessary expenses — including a new 3-port valve — the issue was traced back to faulty wiring during the original installation.
Specifically, the old Economy 7 timer was left connected in parallel with the new Nest Heat Link, causing signal crossover. This was confirmed by a qualified engineer. The installation was therefore not completed with reasonable care and skill, as required by the Consumer Rights Act 2015.
I have contacted the company and requested they rectify their mistake at no cost, but I have yet to receive a satisfactory response. I hope they take accountability and correct this issue promptly.
Will update the review acordingly following their resolution.




