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Heat pumps · Error codes · Kensa
HPKensa

HP on a Kensa heat pump: Overheat warning - no or low flow around heating distribution circuit

Short answer

On a Kensa heat pump, HP means: Overheat warning - no or low flow around heating distribution circuit. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.

Reviewed 23 September 2026 · 7 sources

What it means

The manual says: Overheat warning - no or low flow around heating distribution circuit.

Part involved: Load pump / distribution flow.

When it shows: Legacy panel controller: 'Display flashes fault code HP'.

Likely causes:

  • Air in water pump, stuck pump impeller, heating valves/actuators closed; can show briefly when switching from DHW to space heating.

Is it safe?

Does the heat pump stop?Yes
Engineer needed?Yes

The heat pump stops until the fault clears or is reset.

Resetting itself: unknown.

Manual reset: unknown.

What you can check

  • Note the code shown on the controller/LED; check the heat pump isolator and consumer-unit breaker are on; check thermostat/timer settings.

What the engineer will check

  • Bleed load pump via Schrader valve, check pump runs/spin impeller, open distribution valves/actuators.

Who to ask for: Heating engineer / GSHP installer.

Certification: MCS-certified GSHP installer recommended.

What you might notice

Sources

A code explains what the controller detected, not a confirmed root cause.

Reviewed: 23 September 2026