What the manual says
Manufacturer manualJumper tag fault
What causes this fault?
This fault occurs when the boiler's internal computer lacks the specific identity settings required to operate the hardware safely. It is usually caused by a component failure on the control board or occurs immediately after a repair if the new parts haven't been configured with the correct plug-in coding chips.
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 AL55: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.