Ideal Classic FF 330 Fault codes & diagnostics

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

Regular Natural Gas 8.8 kW 1994-2005 Discontinued
GC Number 41-391-92

Replaced by: Mexico HE

Download the Ideal Classic FF 330 manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

The fault code is already on your display

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

Just want the most common Ideal Classic FF 330 faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 4 documented codes

Tap any card for details

52

Your boiler's small pilot flame is failing to remain lit once you let go of the ignition knob, meaning the main safety mechanism is preventing it from heating your home.

Emergency Engineer only £120-250

Parts commonly replaced

  • Thermocouple
  • Pilot burner assembly
  • Gas valve
Full explanation for 52
53

Your boiler has successfully lit its internal pilot light, but it is failing to release the main supply of gas needed to heat your home.

High Engineer only £150-250

Parts commonly replaced

  • Gas valve
  • PCB (Printed Circuit Board)

Related codes

Full explanation for 53
Boiler Overheat Thermostat

Your boiler has automatically turned off because it got too hot, acting as a safety precaution to prevent damage.

High Engineer only £120-250

Parts commonly replaced

  • Overheat thermostat
  • Pump
  • PCB
  • Diverter valve
Full explanation for Boiler Overheat Thermostat
L E

Your boiler's electronic control centre is experiencing a serious internal error and has stopped working to keep your home safe.

High Engineer only £250-450

Parts commonly replaced

  • Printed Circuit Board (PCB)

Related codes

Full explanation for L E
Status & diagnostic codes

4 operating states & engineer diagnostics

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

neon I 1 Status Your boiler is operating exactly as it should and is currently burning gas to provide heat or hot water. neon I 2 Status Your boiler is failing to light because it cannot confirm that the internal fan is effectively clearing waste gases safely. Neon SG Status Your boiler is currently trying to light the burner and you are seeing the normal indicator for the ignition spark. Neon SGI Status Your boiler is currently trying to light the flame, but if the light continues to flash indefinitely, it means the burner has failed to ignite.