What H01 actually means
The machine has stopped because the water is heating wrongly \u2014 the temperature is either not what it should be, or it is climbing far faster than expected.
Samsung machines monitor the wash water with a temperature sensor while the heater is on. If the readings are out of step with the programme \u2014 typically shooting up too fast \u2014 the control board shuts the heating down and shows this code rather than risk overheating the load or the drum. You'll usually see it part-way through a warm or hot wash, often with the drum full of water.
What usually causes it
- Faulty water temperature sensor giving false readings
- Heating element failing or shorted
- Wiring connection to the sensor or heater has gone bad
- Control board misreading the temperature signal
What you can safely check yourself
Work through these in order. Anything beyond this — panels off, testing parts, anything to do with the wiring — is an engineer's job, and not one to attempt with the machine plugged in.
- Turn the machine off at the wall for a minute, then switch back on and try a cold wash \u2014 if a cold cycle completes normally, that points at the heating side.
- Cancel the cycle and drain the machine using a rinse or spin programme before leaving it standing full of hot water.
When to call someone
This one usually needs an engineer once you have tried the checks above. We cover Nottinghamshire, Derbyshire and Leicestershire, and it's £66 including VAT for an engineer to come out and diagnose it — £84 in total if it's repaired on the visit with no parts needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.
Outside our area? The explanation above still stands — take it to a local engineer and tell them the code. Knowing it saves them time and you money.
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