Potterton Profile 30E Fault codes & diagnostics

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

Regular Natural Gas 8.8 kW 1994-2003 Discontinued

Replaced by: Promax SL

Choose your boiler type

The Profile 30E range comes in 3 types

Pick the one you have. The fault codes, GC numbers and manual differ by type.

40eL 1 codes · 1 GC number 50eL 1 codes · 1 GC number 80eL 1 codes · 1 GC number
Each model has its own manual A family spans several manuals, one per model or generation. Pick your model above and its page has the manual its fault codes were read from.

The fault code is already on your display

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

Fault codes

All 1 documented codes

Tap any card for details

Overheat Limit Thermostat

Your boiler has automatically shut itself down because it became too hot, acting as a safety measure to prevent damage.

High DIY-safe £90-180 Shared across the Profile range

What to check first

  1. Wait for the boiler to cool down completely (at least 30 minutes).
  2. Locate the reset button, usually found under the front of the boiler casing.
  3. Press the button firmly to reset the thermostat; the boiler should then attempt to relight.

Parts commonly replaced

  • Overheat Limit Thermostat
  • Pump
  • System Thermostat
Full explanation for Overheat Limit Thermostat
Status & diagnostic codes

5 operating states & engineer diagnostics

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

30e Status The code 30e is simply the model name of your boiler and does not indicate a fault or any mechanical problem. 40e Status The code 40e is not a fault, but simply the identification code indicating your boiler is a Potterton Profile 30E model. 50e Status The code 50e is not a fault; it is simply an identification code that shows the specific model of your boiler. 60e Status Your boiler is displaying its model identification number rather than an error, which is normal operation and not a fault code. 80e Status The code 80e is simply a model identification code and does not indicate a fault with your boiler.