Biasi M96E Fault codes & diagnostics

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

Combi Natural Gas 24 kW 2004-2008 Discontinued

Replaced by: Parva M96.24SM

Download the Biasi M96E 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 →

Fault codes

All 2 documented codes

Tap any card for details

ER + 69

Your boiler has detected an internal communication error or a control board failure that prevents it from firing up.

High Engineer only £180-350 Shared across the range

Parts commonly replaced

  • Main Printed Circuit Board (PCB)
  • Wiring Harness
Full explanation for ER + 69
LP

Your boiler has detected that the water pressure is too low, causing it to shut down to prevent damage.

High DIY-safe £0-120 Shared across the range

What to check first

  1. Locate the filling loop (the flexible braided hose) underneath the boiler.
  2. Slowly open the one or two taps on the hose until you hear water entering the system.
  3. Watch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar.

Parts commonly replaced

  • Filling loop
  • Pressure switch
  • Expansion vessel
Full explanation for LP
Status & diagnostic codes

2 operating states & engineer diagnostics

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

30c Diagnostic Your boiler has detected that the water temperature has reached an unsafely high level, causing the system to shut down for safety. Li Status Your boiler has failed to ignite because the burner did not light after several attempts, meaning your heating and hot water will not work.