How to fix Ideal Logic Plus fault code F48

What does the Ideal Logic Plus F48 fault code mean?

The F48 fault code on the Ideal Logic Plus indicates a problem with the system pressure, which is typically too low. This can prevent the boiler from operating efficiently or safely.

Common Causes

  • Low Water Pressure: This can occur due to leaks in the system or insufficient water supply.
  • Faulty Pressure Sensor: A malfunctioning pressure sensor may incorrectly report the system pressure, triggering the fault code.

Can I fix it myself? (DIY)

You can attempt to reset the boiler and check the pressure gauge; if the pressure is below 1 bar, you can top it up using the filling loop. However, if you suspect a leak or if the issue persists, it is essential to call a Gas Safe Engineer.

Estimated Repair Cost (2026 UK Prices)

Repair costs for addressing the F48 fault may range from £100 to £250, depending on whether the issue is simply a refill or if a faulty component like the pressure sensor needs replacing.