Samsung Refrigerator Error Code 30

Error code 30 on a Samsung refrigerator indicates a Water Tank Heater fault. The control board has detected that the resistance across the water tank heater circuit at connector CN60 pins 21 and 23 is outside the expected range of 62 ohms plus or minus 7%. This means the heater element, its wiring, or the bimetal safety cutout has failed. The refrigerator flags this code to prevent the heater from operating in a damaged condition.

A shorted heater (0-ohm reading) poses a greater concern than an open-circuit failure, as a short can potentially cause overheating of the heater element or wiring. The control board logs error code 30 specifically to stop the heater from operating when the circuit is out of spec, which helps prevent further damage. It is best to diagnose and repair this issue promptly rather than continuing to run the refrigerator with a known heater fault.

Repair costs depend on which component has failed. A replacement water tank heater element typically costs between 20 and 60 dollars in parts, while a bimetal thermal cutout is generally in the 10 to 30 dollar range. If a professional technician is needed, expect to add labor costs of roughly 80 to 150 dollars depending on your area. Main PCB replacement, if required, is the most expensive outcome and can range from 150 to 350 dollars or more for parts alone.

A knowledgeable DIYer can diagnose this error with a multimeter by disconnecting the CN40 wire from the main PCB and measuring resistance across CN60 pins 21 and 23. A reading of 0 ohms confirms a shorted heater, and infinite resistance points to an open heater, failed bimetal, or broken wire. Replacing a wiring harness or heater element is manageable for those comfortable with appliance repair, but working around electrical components does carry risk, so exercise appropriate caution.

A power reset may temporarily clear the error code from the display, but the code will return once the control board re-checks the water tank heater circuit and detects the out-of-range resistance again. Because this error reflects an actual measured electrical fault rather than a software glitch, the underlying component problem must be corrected before the code will stay cleared.