E419 on a Samsung heat pump: Outdoor EEV open error
Short answer
On a Samsung heat pump, E419 means: Outdoor EEV open error. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 2 sources
What it means
On the EHS Mono (R410A, AE***JXYD*H)
The manual says: Outdoor EEV open error.
Part involved: Electronic expansion valve (EEV).
When it shows: Unit self-diagnosis: Outdoor EEV open error.
Likely causes:
- Electronic expansion valve (EEV) fault: coil, connector, valve body or leakage.
- Engineer checks per Samsung service manual: Check the outdoor EEV coil and EEV connector to the PCB.
On the EHS Split R32 (AE***RXED*G)
The manual says: OUTDOOR UNIT EEV operation error.
Part involved: Electronic expansion valve (EEV).
When it shows: Unit self-diagnosis: OUTDOOR UNIT EEV operation error.
Likely causes:
- Electronic expansion valve (EEV) fault: coil, connector, valve body or leakage.
- Engineer checks per Samsung service manual: Check the outdoor EEV coil and EEV connector to the PCB.
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 full error code shown on the controller; check the heat pump breaker/isolator in the consumer unit is ON; then contact your installer or Samsung service; Samsung manuals do not describe a homeowner reset for this code.
What the engineer will check
- Check the outdoor EEV coil and EEV connector to the PCB. Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: F-gas certified refrigeration/heat pump engineer.
Certification: F-gas certification (UK F-gas Regulation).
What you might notice
What owners and engineers report
1 owner and engineer report mentions this.
- Insufficient heating (house not warm enough) on the EHS Split R32 (AE***RXED*G): 1 report
Sources
- Samsung EHS Mono (R410A) Outdoor Unit + Control Kit MIM-E03AN Service Manual ↗ · EHS Mono + MIM-E03AN service manual · page ManualsLib viewer p.45 (printed p.44) · Reviewed 23 September 2026
- EHS R-32 Split Outdoor Unit Installation Manual (EU) DB68-08407A-06 ↗ · DB68-08407A-06 · page p.51 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026