Heatline Capriz 2 Fault codes & diagnostics

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

Combi Natural Gas 24-28 kW 2013-2018 Discontinued

Replaced by: Capriz2 c

The fault code is already on your display

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

Just want the most common Heatline Capriz 2 faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 3 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
Full explanation for F.22
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
Full explanation for F.28
F.xx

Your boiler has encountered a technical communication or internal sensor error that prevents it from firing up correctly.

High Engineer only £100-280

Parts commonly replaced

  • Main PCB
  • Temperature Sensor
  • Wiring Loom
Full explanation for F.xx