E913 on a Samsung heat pump: Six times detection for Flow Switch Error (Re-operation is not possible)
Short answer
On a Samsung heat pump, E913 means: Six times detection for Flow Switch Error (Re-operation is not possible). The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Six times detection for Flow Switch Error (Re-operation is not possible).
Part involved: Water pump and flow sensor/switch.
When it shows: Unit self-diagnosis: Six times detection for Flow Switch Error (Re-operation is not possible).
Likely causes:
- Water flow too low or flow sensor/switch signal inconsistent with pump state: low system pressure, air in system, blocked strainer/filter, closed valve, pump fault, flow switch/sensor or PCB fault, or an external pump creating flow.
- Engineer checks per Samsung service manual: Repeated flow switch errors (6 times): investigate water pump, flow switch, filter/strainer and water flow before re-operation.
Is it safe?
Switch the heat pump off at its isolator and call an engineer.
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: yes - re-operation not possible until investigated (per Samsung).
What you can check
- Note the full error code shown on the controller; check the heat pump breaker/isolator in the consumer unit is ON; check the heating system pressure gauge reading (typically 1-2 bar when cold; do not top up unless you have been shown how); check the filling loop is closed; then contact your installer or Samsung service; Samsung manuals do not describe a homeowner reset for this code.
What the engineer will check
- Repeated flow switch errors (6 times): investigate water pump, flow switch, filter/strainer and water flow before re-operation. Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: Heat pump installer (wet system / hydraulics).
Certification: None specific (plumbing competence); competent electrical worker for pump/PCB electrical tests.
What you might notice
Sources
- Air to Water Heat Pump User manual AE200DN**** / AE160DN**** / MIM-E03FN (2024 ClimateHub / control kit) DB68-12922A-05 ↗ · DB68-12922A-05 · page p.57 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026