Samsung Dishwasher Not Heating

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Run a normal cycle long enough to observe whether the dishwasher fills, washes, and reaches its drying or completion stage; check the display for an HE, HE1, HE2, or HE3 code.

   Expected result: The cycle completes with a heating code, stops early, or completes without a code but dishes and the tub remain cold.

   Next step: Record the exact display or light pattern and continue with the low-risk checks below; do not remove panels.

   Why this matters

   Why: A recurring code or repeated cold result makes a heating-system or temperature-sensing problem more likely; one interrupted cycle is less conclusive.

2. Check 2

   Confirm that the dishwasher is starting a complete cycle rather than being paused, cancelled, or left in a drain phase after the Start button was held.

   Expected result: The machine only drains or never advances to washing, or it completes a full cycle but still does not heat.

   Next step: Select the model's normal cycle and press Start briefly; if a full cycle still ends cold, stop repeating resets and arrange service.

   Why this matters

   Why: A cycle-control issue can mimic a heating failure; a full cycle with cold water shifts suspicion back to the heating circuit.

3. Check 3

   Check the incoming water supply and accessible filter area for a closed valve, a kinked hose, or heavy debris, without reaching under the machine or touching wiring.

   Expected result: Water supply is restricted, or the supply is normal but the machine repeatedly reports a heating issue.

   Next step: Correct only an accessible supply restriction described by the manual; leave internal diagnosis to a qualified technician.

   Why this matters

   Why: A supply or flow problem can prevent normal cycle progress; normal filling with repeated heating symptoms makes an internal heater, thermostat, or wiring fault more likely.

4. Check 4

   If the dishwasher recently lost power, reset it only after noting any code: switch off its breaker or unplug it, wait for the charge to clear, then restore power and try one normal cycle.

   Expected result: The code clears and heating returns, or the code/cold result returns on the next cycle.

   Next step: Use the result to decide whether service is needed; do not keep resetting a recurring heating fault.

   Why this matters

   Why: A one-time electronic interruption may have cleared; a returning symptom indicates the underlying issue remains.