Your boiler's main control board is having trouble communicating with the display panel, meaning the system cannot correctly send or receive instructions.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Text display not detected.
What causes this fault?
This fault occurs when the boiler's internal computer can no longer talk to the front display panel. It is usually caused by a loose connection in the internal wiring or a component failure on one of the circuit boards, preventing the boiler from receiving your heating instructions. Over time, heat and vibration inside the unit can also cause these electronic connections to degrade.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like FC — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Worcester Bosch Greenstar 30HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.