Heatline Capriz 2 Fault codes & diagnostics

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

Combi Natural Gas 24-28 kW 2015-present
GC Numbers 47-157-2747-157-28
Download the Heatline Capriz 2 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 →

Which version do you have?

The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.

GC number Appliance (register name) Produced
47-157-27 CAPRIZ 2 24c 2015–present
47-157-28 CAPRIZ 2 28c 2015–present

All 2 documented codes

Tap any card for details

F.22

Your boiler has detected that there is not enough water pressure in the system to operate safely, causing it to shut down.

High DIY-safe £0-120

What to check first

  1. Locate the filling loop (usually a silver flexible hose) underneath the boiler.
  2. Slowly open the one or two taps on the hose until you hear water entering.
  3. Watch the pressure gauge and close the taps once the needle reaches between 1.0 and 1.5 bar.

Parts commonly replaced

  • Filling loop taps
  • Expansion vessel
  • Pressure sensor
F.28

Your boiler is failing to light the gas flame despite several attempts, meaning it cannot provide heating or hot water.

High DIY-safe £100-£350

What to check first

  1. Check if other gas appliances in your home, such as a hob, are working to ensure gas supply is active.
  2. Verify that your gas meter has credit and that the emergency control valve is open.
  3. Press the Reset button (indicated by a flame with a line through it) for 3 seconds to restart the ignition process.

Parts commonly replaced

  • Ignition Electrode
  • Gas Valve
  • Spark Leads
  • PCB

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