Samsung Washer Error Code Hr — Heater Relay Failure
What this means
The Hr error code indicates the relay on the main control board that controls the internal water heater has failed. Samsung front-load washers with built-in heaters use this relay to activate heating during hot wash and sanitize cycles. When the relay fails, the washer may still run cold-water cycles normally but cannot heat water internally. This is a control board issue, not a heater element issue.
Alternate codes: HR
Step-by-step fix
4 stepsConfirm the symptoms
Run a hot wash cycle and feel the door glass after 10 minutes. If the water feels cold, the heater is not activating. Run a cold wash cycle to confirm the washer otherwise functions normally.
If both hot and cold cycles fail, the problem is likely something else (motor, pump, etc.), not the heater relay.
Test the heater element first
Unplug the washer. Access the heater element (usually beneath the tub at the back). Disconnect the heater wires and test resistance — expect 10–30 ohms. Also test from each terminal to ground (the tub) — any reading means the heater is shorted and must be replaced.
If the heater is shorted, it may have blown the relay — both may need replacement.
Check for voltage at the heater during a hot cycle
Reconnect the heater wires. Start a hot cycle and carefully measure voltage at the heater connector (240V on most models). If no voltage appears when heating should be active, the relay is not closing.
This involves testing live voltage. If you are not comfortable with this, proceed directly to board replacement or call a technician.
Replace the main control board
If the heater element is good but no voltage reaches it, the relay on the control board has failed. Replace the main control board, reconnect all harnesses, and test with a hot wash cycle.
Transfer any model-specific programming from the old board if required — check the tech sheet for calibration procedures.
When to call a professional
Control board replacement is straightforward, but diagnosing whether the relay versus the heater is at fault requires live-voltage testing. If unsure, call a technician.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Main Control Board
Part #DC92-01021B · $120–$250
If heater is good but relay does not close
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