Trying to get some redress from green energy installers when things go wrong is a long, hard slog

Two years ago I signed a £14,409 contract for a heat pump installation and paid the deposit. Three weeks after the pump was fitted, the company that installed it, Omni Heat and Power, went into liquidation. It had been due to return to repair damage to the pump’s casing, and I had not yet paid the balance. I paid the pump manufacturer Grant Engineering UK to do the repairs and, as I had not received the promised seven-year guarantee from Omni, I decided to purchase an extended warranty from Grant.

Within two months, the pump developed a fault and kept switching off, leaving us without heating or hot water. Several technician visits and a £1,000 flushing of the system did not help. Grant Engineering blamed the installation rather than the equipment, and refused to honour the warranty or advise on remedies.