Refrigerator Medium Severity
E3 Appliance Error Code

Asko Refrigerator E3 Error: Defrost sensor fault

Asko refrigerator E3 error is a common issue reported by Asko appliance owners. What Asko Refrigerator Error Code E3 Means Error code E3 on an Asko refrigerator indicates a fault in the defrost system — typically the defrost temperature sensor, the defrost heater element, or the thermal limiter (cutout) in the defrost circuit. Asko refrigerators […]

By Denys Mitchell Lead Appliance Repair Specialist & Technical Writer

No

DIY Fixable

From $180

Typical Repair Cost

60-120 min

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Maybe. The unit may cool adequately in the short term, but without working defrost the evaporator will eventually ice over and cooling will fail completely. Plan repair within a few days.

Can I reset the code?

No. A manual defrost may clear the code temporarily, but E3 will return unless the faulty defrost sensor, heater, or limiter is replaced.

When to stop immediately?

Stop if you notice: Cooling in either compartment has already failed and temperatures are at or above safe limits., You can see the frost on the evaporator is thicker than 10 mm — airflow is compromised and food safety is at risk..

Symptoms You May Notice

Heavy frost build-up on the rear inner wall

Without working defrost cycles, ice accumulates on the evaporator behind the rear panel. After a week or more the frost can block airflow and reduce cooling efficiency noticeably.

Reduced cooling performance in both compartments

As frost blocks the evaporator fins, the fan cannot circulate cold air effectively, causing both the fridge and freezer to be warmer than their set temperatures.

Water pooling on the base of the refrigerator section

Frost that eventually melts naturally (rather than through a controlled defrost cycle) can release more water than the drain can handle, causing puddles inside the cabinet.

E3 displayed on the control panel

The control panel shows E3 to indicate that the defrost system has reported a fault and automatic defrost has been suspended.

Possible Causes

1

Failed defrost NTC sensor

The thermistor clipped to the evaporator coil that confirms defrost completion has failed open or short, preventing the control board from terminating defrost cycles correctly.

DIY Possible
2

Burned-out defrost heater

The resistive heater element wrapped around the evaporator has burned through, meaning frost cannot be melted away even if the board initiates a defrost cycle.

Requires Professional
3

Defrost thermal limiter (thermostat) has tripped

The thermal cutout in the defrost circuit, designed to protect against overheating, may have blown and needs replacement to restore the defrost circuit.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Perform a manual defrost

    Unplug the refrigerator, empty all food, leave all doors open, and place towels to catch melt water. Allow full defrost for 24 hours, then restart. This can temporarily resolve heavy frost that was blocking the sensor.

    Never use a heat gun or sharp object to speed up defrosting — this can puncture the evaporator and cause a refrigerant leak.

  2. 2

    Inspect and reseat the defrost sensor connector

    After defrosting and with the unit still unplugged, remove the freezer back panel. Locate the defrost sensor (usually clipped to the evaporator tubing). Check its connector to the harness and press firmly.

    The defrost sensor is typically white or grey and sits near the centre of the evaporator coil.

    Tools required
  3. 3

    Test the defrost sensor with a multimeter

    Disconnect the sensor and measure resistance. At room temperature (~20 °C) an Asko defrost NTC should read approximately 5–15 kΩ. An open-circuit reading (OL) means the sensor has failed and needs replacing.

    Replacement defrost sensors for Asko models cost from $20–$40 and are a direct swap with no soldering required.

    Tools required

When to Call a Professional

Contact a qualified technician if:

  • Replacing the defrost sensor does not clear E3 — the heater or thermal limiter needs professional replacement (from $120).
  • The defrost heater shows visible burn marks or the wire insulation has melted.
  • The evaporator is buried under more than 2 cm of ice and manual defrost has not resolved the code.

Need Professional Help?

Find qualified technicians in your area for proper diagnostics and repair.

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