BoilerFaultCodes.com

Worcester Bosch RD 532 Combi Fault Codes

Combi Natural Gas 32 kW 2005-2007 Discontinued
GC Number: 47-108-11

Replaced by: Greenstar 30i

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

A7
Your boiler is struggling to accurately measure the temperature of your hot water, which usually means your taps will only run cold.
Gas Safe engineer required · £90-160
A8
Your boiler's internal computer has lost its connection with the main control panel, meaning the system cannot talk to itself to stay running.
Gas Safe engineer required · £180-450
AC
Your boiler's internal computer has lost communication with one of its main control components, meaning it cannot operate safely.
Gas Safe engineer required · £180-£450

All 19 fault codes

Code Severity Plain English
A7 High Your boiler is struggling to accurately measure the temperature of your hot water, which usually means your taps will only run cold.
A8 High Your boiler's internal computer has lost its connection with the main control panel, meaning the system cannot talk to itself to stay running.
AC High Your boiler's internal computer has lost communication with one of its main control components, meaning it cannot operate safely.
b1 High Your boiler has lost its internal identity chip and cannot communicate with its main control board, meaning it won't be able to provide heating or hot water until it is reconnected.
C1 High Your boiler has stopped working because the internal fan isn't spinning fast enough to safely clear away exhaust fumes.
C4 High Your boiler's internal fan is running constantly and won't shut down, which prevents the heating system from starting its safety checks.
C6 High Your boiler has detected that the internal fan is spinning faster than it should, which has caused the system to shut down for safety.
CC Low Your boiler has lost connection with its external temperature sensor, which means it cannot adjust its settings based on the weather outside.
E2 High Your boiler has detected a fault with a internal sensor that monitors the temperature of the water used to heat your radiators, causing the system to shut down for safety.
E9 High Your boiler has shut down because its internal temperature got too hot and a safety switch has tripped to prevent damage.
EA High Your boiler has tried to light several times but has failed to detect a flame, meaning your heating and hot water will not work until it is reset or repaired.
F0 High Your boiler's internal computer has encountered a software or communication glitch that is preventing it from running safely.
F7 High Your boiler thinks it sees a flame even though it hasn't signaled the system to start, causing it to shut down for safety.
FA Emergency Your boiler is still sensing a flame even though it has tried to turn the gas off, which is a safety conflict that requires a professional inspection.
Fd Low Your boiler has temporarily stopped because the reset button was held down for too long or pressed accidentally.
P1 High Your boiler is struggling to start up because an internal electrical fuse has failed, cutting power to essential components.
P1, P2, P3, P1... Low Your boiler is currently going through its automatic start-up and diagnostic sequence and should return to normal operation shortly.
P2 High Your boiler is failing to start up because an internal electrical fuse has blown and needs to be replaced.
P3 High Your boiler's internal electrical circuit has lost power because a small safety fuse has blown, preventing the system from starting up.

Status & diagnostic codes

These codes indicate your boiler's operating state or a diagnostic reading — not necessarily a fault. Status codes (S.) mean normal operation; diagnostic codes (D.) are informational readings used by engineers.

Code Type Description
d1 Diagnostic Your boiler has stopped working because an internal safety sensor has detected that it may be overheating or is unable to verify the water temperature correctly.
d3 Diagnostic Your boiler has lost its connection to an external safety device or a control link, causing it to stop running as a precaution.

Worcester Bosch RD 532 Combi 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.

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