BoilerFaultCodesWhat the manual says
Manufacturer manualInverter Error
What causes this fault?
This fault occurs when the internal electronics that manage the compressor's power supply fail to regulate the electrical flow correctly. It is usually caused by a technical failure on the inverter circuit board or loose internal connections that prevent the system from getting the energy it needs to run.
This fault can be more frequent during summer or heatwaves, as high ambient temperatures place additional thermal stress on the electronic power components.
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.
Avoid the next call-out bill
A cover plan would handle faults like J47: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.