Potterton Promax FSB 30HE Fault Codes
System Natural Gas 30 kW 2006-2008 Discontinued
GC Number: 41-591-93
Replaced by: Promax System HE Plus
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
FAN LOCKOUT Flame Failure (Red Light) On Off On Off
Your boiler's fan, which safely clears exhaust gases from the unit, has stopped spinning correctly and prevented the system from firing up.
Gas Safe engineer required · £250-£450
Your boiler has tried to light but failed to stay on, meaning the system has shut down for safety until it is reset or repaired.
May be DIY safe · £120-350
Your boiler has shut down because water intended for your drain is backing up and has triggered a safety sensor.
May be DIY safe · £100-220
All 8 fault codes
Potterton Promax FSB 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.
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