Samsung Refrigerator Error Code 33E: Ice Pipe Heater Failure
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What Error Code 33E Means
The 33E error code means the ice pipe heater inside your Samsung refrigerator has failed or lost connection to the main control board. This heater prevents the water supply line to the ice maker from freezing. Without it, water stops flowing to the ice maker and ice production halts completely. You will also see this displayed as 33C on some Samsung models.
Common Causes
Burned-out ice pipe heater
The heating element inside the water supply tube has failed. This is the most common cause. The heater has a limited lifespan and burns out after years of continuous use.
Broken wire harness connection
The wiring between the ice pipe heater and the main PCB is damaged, corroded, or disconnected. Vibration from the compressor loosens connections over time.
Faulty main control board
The control board is not sending voltage to the ice pipe heater. A failed relay or damaged trace on the PCB prevents the heater circuit from activating.
Frozen water supply line
The heater failed some time ago and the water line is now completely blocked with ice. The frozen line triggered the sensor to throw the 33E code.
How to Fix It
- 1
Reset the refrigerator
Unplug the refrigerator from the wall outlet. Wait 5 minutes. Plug it back in and check the display. If 33E returns within 24 hours, the heater circuit has a confirmed fault.
Always unplug the unit before working on any electrical components.
- 2
Access the ice pipe heater
Remove the ice maker assembly by lifting the wire bail arm and pulling the unit forward. Locate the water supply tube running from the back wall of the freezer to the ice maker. The ice pipe heater wraps around or runs alongside this tube.
- 3
Test the heater with a multimeter
Disconnect the heater wire harness. Set your multimeter to ohms (resistance). Place the probes on the two heater terminals. A good heater reads between 200 and 800 ohms depending on the model. An open-line reading (OL or infinity) confirms a burned-out heater.
Confirm the refrigerator is unplugged before testing with the multimeter.
- 4
Inspect the wire harness
Follow the heater wires back to the main board connector. Look for cracked insulation, burn marks, or loose pin connectors. Tug gently on each connector to check for a secure fit. Replace any damaged wiring.
- 5
Thaw the water supply line
If the tube is frozen, use a turkey baster to flush warm (not boiling) water through the supply line. Alternatively, use a hair dryer on low heat directed at the frozen section for 5-10 minutes. Do not use a heat gun — it will melt plastic components.
- 6
Replace the ice pipe heater
Order the OEM Samsung ice pipe heater assembly for your model (check the model number on the sticker inside the fridge door). Disconnect the old heater, remove it from the water tube, install the new one in the same position, and reconnect the harness to the main board.
When to Call a Professional
Call a technician if the heater tests good but the error persists — the main control board likely needs diagnosis. Board-level repair requires specialized equipment. TruePro charges a $59 diagnostic fee that gets credited toward your repair, and we back all work with a 90-day warranty on parts and labor. Call 877-378-3111 for same-day service in LA County, Orange County, or Ventura County.
Estimated Repair Cost
| Option | Estimated Cost |
|---|---|
| DIY (parts only) | $30 – $80 |
| Professional repair | $180 – $350 |
The ice pipe heater part runs $30-$80 depending on model. Professional repair includes labor at $90-$150/hr plus parts. First-time TruePro customers save 15% on labor with code NEW15.
See full refrigerator repair cost breakdown →Samsung Refrigerator 33E — FAQ
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