BoilerFaultCodesTechnical description
Inverter High Temperature
What causes this fault?
This fault occurs when the electrical brain of the heat pump, known as the inverter, gets too hot and shuts down to prevent permanent damage. The most common reasons are a failure of its dedicated cooling fan or the thermal paste that transfers heat away from the electronics becoming dry and ineffective. It can also be caused by debris blocking the air vents, preventing the unit from cooling itself down properly during operation.
This fault is more common during summer heatwaves when high outdoor temperatures make it much harder for the internal cooling system to keep the electronics at a safe operating temperature.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.