EN

Severity: Low

Samsung Refrigerator Error 5E – Fridge Defrost Sensor Error

The sensor on the fresh-food evaporator reads open or shorted, so the board can't tell when defrost is done.

At a glance

Severity: 2/5 – Low2/5

Severity: Low

Meaning
Fridge Defrost Sensor Error
Typical repair cost
$0–$550
DIY difficulty
Moderate

Samsung models that cool the fresh-food section with their own evaporator use a small thermistor on that coil to decide when a defrost cycle has melted all the frost. The board checks the sensor's resistance constantly; if it reads as an open circuit or a dead short, it stores 5E (5C on some newer boards). Nothing stops working right away, because the board falls back to a fixed defrost schedule, but that backup is rarely a perfect match, and frost can slowly build up on the fridge coil. Left alone, a 5E fridge often ends up showing 22E once the ice reaches the fan. The exact sensor meaning can differ on models with a single evaporator, so check your model's tech sheet.

How it looks on the display

Samsung Refrigerator / Freezer display showing error 5E

Model families & display variants

Model familyShowsNote
Twin Cooling French-door and side-by-side models5ERefers to the sensor on the separate fresh-food evaporator.
Newer boards5CSame fridge defrost sensor meaning with the C suffix.
Models read out via self-diagnosis5E / SEThe 5 on a seven-segment display looks like an S, so owners often report the code as SE.

Safety first · Consult a professional

Unplug the refrigerator before you remove the rear panel in the fresh-food section or the cover over the main board at the back. Keep water away from open connectors when you plug the unit back in for a test.

  • Unplug the appliance or switch off the breaker before opening any panel. Mains voltage can kill.

Symptoms

  • 5E or 5C on the display, sometimes only visible in the self-diagnosis readout
  • Code appears shortly after a manual defrost or a spill inside the fridge
  • Fresh-food section cools normally at first, then slowly loses performance over days or weeks
  • Frost visible behind the rear vents of the fridge section
  • Fridge section fan starts ticking later on (a 22E may follow)

Possible causes

Ranked by how often each cause is behind this code (editorial estimate).

  1. Water or ice inside the sensor's connector near the fridge evaporator 35%
  2. Thermistor itself failed open or shorted 30%
  3. Sensor wire pinched or broken where it passes behind the evaporator cover 15%
  4. Loose or corroded plug at the main board 10%
  5. Sensor input on the main board faulty 10%

Fix it step by step

Diagnostic flow: 5E1Note when the code first appeared2Open the fresh-food evaporator cover3Dry and inspect the connector4Measure the thermistor5Check the wiring back to the board6Look at the coil before closing up

  1. Note when the code first appeared

    A 5E that showed up right after you defrosted the fridge by hand, cleaned it with lots of water or had a spill is a strong hint that moisture reached the sensor plug. A code that appeared on its own in normal use points more toward the sensor or its wire.

  2. Open the fresh-food evaporator cover

    Unplug the fridge, take out the lowest shelves or drawers and unscrew the panel on the back wall of the fresh-food section. The defrost sensor is the small capsule clipped to one of the upper tubes of the coil, usually with a two-wire lead.

    Tools: Screwdriver, Flashlight

  3. Dry and inspect the connector

    Unplug the sensor connector and look for water droplets, ice or green corrosion on the pins. Dry it with a hair dryer on low, then plug it back together firmly until the latch clicks.

    Tools: Flashlight

  4. Measure the thermistor

    Samsung defrost sensors are typically thermistors of about 5 kΩ at room temperature (77°F), rising as they cool – roughly 13–14 kΩ in a cup of ice water at 32°F. OL (open) or close to 0 Ω means the sensor has failed; the tech sheet behind the kick plate or on the back lists the exact table.

    Tools: Multimeter

  5. Check the wiring back to the board

    If the sensor itself reads correctly, measure the same two wires at the main board plug (behind the cover at the lower back). A good sensor that reads open at the board means a broken wire in the cabinet, often at a bend or a harness clip.

    Tools: Multimeter, Screwdriver

  6. Look at the coil before closing up

    While the panel is off, check the fridge evaporator for frost. A light, patchy layer is fine; a thick white coat means the sensor fault has already disturbed defrosting, so melt it off before reassembly.

    Tools: Flashlight, Towels & shallow pan

How to reset 5E

  1. Unplug the refrigerator or switch off its breaker for about a minute
  2. Plug it back in; the code clears if the sensor now reads within range
  3. If 5E returns right after power-up, the sensor circuit is still open or shorted

Where the parts are

Refrigerator: evaporator fan, defrost heater and compressor – 5E123456
Refrigerator: evaporator fan, defrost heater and compressor
  1. 1Evaporator fan
  2. 2Defrost heater
  3. 3Temperature sensor
  4. 4Door switch
  5. 5Compressor
  6. 6Condenser

Repair options & costs

RepairDIY?Estimated cost
Dry and reseat the sensor connector Yes $0
Fridge defrost sensor (part only) Yes $15–$45
Defrost sensor replaced by a technician No $150–$280
Cabinet wiring repair No $150–$300
Main control board replacement No $250–$550

Rough US estimates; technician call-out fees vary by region. Not a quote.

When to call a technician

Get a technician if the sensor and its wiring measure correctly but 5E keeps returning, which points to the main board. Also call if the fresh-food section rises above 40°F while the code is showing, or if you'd rather not open the evaporator cover – the part is cheap, but the labor is most of the bill.

Frequently asked questions

Is my food at risk with 5E?

Usually not right away, because the fridge keeps cooling and defrosts on a backup schedule. Keep a thermometer in the fresh-food section; as long as it stays at 40°F or below, food is fine.

Why did 5E appear after I defrosted the fridge?

Meltwater or cleaning water often finds its way into the sensor plug near the coil. Drying and reseating that connector clears the code more often than people expect.

Is 5E the same as SE?

Yes, on a refrigerator the SE people report is usually 5E read from a seven-segment display. Don't confuse it with SE on a Samsung microwave or range, which means something else.

Can I ignore 5E if the fridge still cools?

For a short time, but don't let it drift. Without a working sensor the defrost can end too early, and the frost that builds up will eventually block the fridge fan and bring a 22E.

Sources