Baxi Bermuda 552 Fault codes & diagnostics

2 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Natural Gas 16.1 kW 1980-1995 Discontinued
GC Number 44-077-50
Download the Baxi Bermuda 552 manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

This boiler uses indicator light combinations

Note which lights are on, off, or flashing and at what speed. Match the combination to the cards below. Do not reset until you have noted the pattern. How to read fault codes →

Versions & GC numbers

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
44-077-50 Bermuda 552 1980–1995
Fault codes

All 2 documented codes

Tap any card for details

LED / flash-pattern codes
No Flashes (after 15 seconds)

Your boiler has failed to detect a flame or a temperature reading, meaning it has completely shut down for safety.

High Engineer only £280-450

Parts commonly replaced

  • Printed Circuit Board (PCB)
  • Temperature Sensor
  • Flame Sensing Electrode
Full explanation for No Flashes (after 15 seconds)
Digital codes
Orange light (Boiler fault)

Your boiler has detected a problem and has shut itself down for safety, meaning your heating and hot water will stop working until it is reset or repaired.

High DIY-safe £100-280

What to check first

  1. Locate the reset button on the control panel
  2. Press and hold the reset button for five seconds
  3. Wait for the boiler to attempt to reignite; if the light stays off and the boiler fires, it was a nuisance trip

Parts commonly replaced

  • Gas Valve
  • Ignition Electrode
  • Flame Sensing Probe
  • Printed Circuit Board (PCB)
Full explanation for Orange light (Boiler fault)
Status & diagnostic codes

10 operating states & engineer diagnostics

Not faults — these are normal operating states. Tap to expand.

High rate LED flashing yellow Diagnostic Your boiler has detected an internal fault during its startup sequence and is signaling that it needs a technical health check. Indicator LED - green Status Your boiler is working correctly; the green light simply confirms that the small pilot flame is lit and the system is ready to operate. Indicator LED - orange Status Your boiler is receiving a signal from your thermostat or programmer to turn on and start heating your home. High rate LED - yellow Status Your boiler is stuck running at its highest power setting and is not modulating down as it should. Orange light (first) Status Your boiler is receiving a constant electrical signal even when it should be off, often caused by a faulty external control or internal component failure. Orange light (second) Status Your boiler's electronic control box has detected an internal electrical failure or a timing error that prevents it from starting the ignition process. Orange light (single) Status Your back boiler is receiving constant electricity but is not responding, which usually indicates the internal controller or a safety sensor has failed. Orange light (third) Status Your boiler is attempting to light but is failing to recognize the flame or ignite successfully. Second orange light Status Your back boiler is receiving two different electrical power signals at the same time, which is causing a control conflict and preventing it from running properly. Third orange light Status Your boiler is trying to light the flame but can't quite get the fire started, despite the igniter clicking.