Ideal F1 Fault Code (Logic Combi)

Safety disclaimer

Fault code summary

Manufacturer

Ideal

Fault code

F1

Fault type

Low pressure

Severity

Not specified

Reset

Not specified

Applicable models

Logic Combi 24, Logic Combi 30, Logic Combi 35

Quick answer

Low water pressure.

What does this fault code mean?

Low water pressure.

Common causes

• System water pressure below the range stated by Ideal for this model.

Symptoms

This information was not provided in the verified manufacturer source.

What can the homeowner safely check?

• Check the system pressure gauge; Ideal's guide says the pressure should be between 1 and 1.5 bar.

Boiler reset information

Reset information was not provided in the verified manufacturer source. Do not repeatedly reset an unresolved fault.

When should I call an engineer?

Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.

Engineer diagnosis

• Assess system pressure and any continuing pressure loss.

Applicable boiler models

• Logic Combi 24
• Logic Combi 30
• Logic Combi 35

Related fault codes

• F2 — Logic Combi

  Flame loss.

  Read fault code
• F3 — Logic Combi

  Fan fault.

  Read fault code
• F4 — Logic Combi

  Flow thermistor fault.

  Read fault code
• L4 — Logic Combi

  Flow thermistor fault.

  Read fault code

Manufacturer documentation

‘F1’ on Your Ideal Logic Combi — Low Water Pressure — check to see if the system water pressure is between 1 & 1.5bar on the system pressure gauge.

Last verified

2026-09-12

Frequently asked questions