E436 on a Samsung heat pump: Protect for Freezing Burst Control Error
Short answer
On a Samsung heat pump, E436 means: Protect for Freezing Burst Control Error. 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: Protect for Freezing Burst Control Error.
Part involved: Plate heat exchanger / water circuit freeze protection.
When it shows: Unit self-diagnosis: Protect for Freezing Burst Control Error.
Likely causes:
- Freeze protection of plate heat exchanger/water circuit triggered: low water flow, low water temperature, refrigerant cycle issue.
- Engineer checks per Samsung service manual: Check water flow and plate heat exchanger freeze protection (heating/defrost).
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; 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 outdoor unit is not blocked by leaves, debris or snow and air can flow freely; then contact your installer or Samsung service; Samsung manuals do not describe a homeowner reset for this code.
What the engineer will check
- Check water flow and plate heat exchanger freeze protection (heating/defrost). Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: Heat pump engineer (hydraulics and refrigeration); R290 (A3 flammable refrigerant) competence.
Certification: F-gas certification if refrigerant circuit work is needed; R290/flammable refrigerant handling training (e.g. hydrocarbon refrigerant course).
What you might notice
Sources
- EHS R290 Mono Outdoor Unit Installation Manual AE***CXYD** (EU) DB68-12496A-03 ↗ · DB68-12496A-03 · page p.24 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026