Samsung EHS 536 fault code

What it means

PHE refrigerant leak error

Refrigerant leak detected at the plate heat exchanger — refrigerant crossing into the water circuit is the worst case here.

Safety: R290 is A3 flammable — no ignition sources, ventilate, R290-rated equipment only for any refrigerant-side work.

UK models this code applies to

From the Samsung service literature we hold (Samsung MWR-WW10N user & service manual DB68-08470A-17 (Appendix: error codes)) — not a scraped list.

Now the harder half: proving what caused it

536 names a symptom, not a root cause. In the app, the same code opens a guided investigation: what to measure first, the expected values for your exact model, and an honest verdict — including “nothing in this machine is broken” when that's what the readings say.