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Fisher & Paykel Dryer Error Code Err3

The exhaust NTC thermistor and/or its related circuitry have malfunctioned.

Fisher & Paykel codesFisher & Paykel dryer codes

The exhaust NTC thermistor and/or its related circuitry have malfunctioned.

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What Err3 means on a Fisher & Paykel dryer

Err3 on a Fisher & Paykel dryer indicates a fault in the exhaust NTC (Negative Temperature Coefficient) thermistor circuit. The exhaust NTC thermistor is a temperature-sensing resistor positioned in the exhaust airflow path of the dryer. Its function is to continuously monitor the temperature of air leaving the drum so the control board can regulate heat output and protect against overheating. As temperature rises, an NTC thermistor's resistance decreases in a predictable curve, and the control board reads this resistance to calculate the actual exhaust temperature.

When the control board detects a signal that falls outside the expected resistance or voltage range for the exhaust NTC circuit, it triggers Err3. This can result from a thermistor that has failed open or short circuit, damaged wiring in the thermistor harness, corroded or loose connector terminals, or a fault on the control board itself affecting the sensing circuit. Because the dryer relies on this sensor to prevent thermal runaway, it will halt operation when the reading is implausible.

Diagnosing Err3 typically involves measuring the thermistor's resistance across its terminals and comparing it to the expected value at a known ambient temperature. Wiring continuity between the thermistor and the control board should also be confirmed. If resistance and continuity are within spec, the control board's signal processing circuitry may be at fault, which requires board-level diagnosis or replacement.

Source: manufacturer service documentation.

Common causes of Err3

  1. 01

    Failed exhaust NTC thermistor

    Part replacement

    The thermistor itself can fail open or short internally, producing a resistance reading outside the valid range. This is the most frequent cause and is confirmed by measuring resistance at the thermistor terminals and comparing it to the specification for the ambient temperature.

  2. 02

    Damaged or broken thermistor wiring harness

    Part replacement

    The wiring between the thermistor and the control board can fray, break, or suffer insulation damage from heat exposure in the exhaust path. Inspect the harness visually and test each wire for continuity.

  3. 03

    Corroded or loose connector terminals

    Wiring / connection

    The connector pins at either the thermistor plug or the control board harness socket can corrode or work loose, interrupting the signal. Inspect connectors for oxidation, bent pins, or incomplete seating and clean or reseat as needed.

  4. 04

    Control board fault in the sensing circuit

    Part replacement

    If the thermistor and all wiring test within specification, the fault may lie in the control board's NTC input circuitry. This requires board-level diagnosis and typically means replacing the control board.

See the test procedure for each cause

Frequently asked questions about Err3

What does Err3 mean on a Fisher & Paykel dryer?
Err3 indicates that the exhaust NTC thermistor or its associated wiring circuit has malfunctioned. The exhaust NTC thermistor monitors the temperature of air leaving the dryer drum, and the control board has detected a reading outside the expected range. The dryer stops operation as a safety measure until the fault is resolved. The cause can be a failed thermistor, damaged wiring, or a faulty control board.
Can I fix Err3 on my Fisher & Paykel dryer myself?
A knowledgeable DIYer can inspect the thermistor wiring harness and connector terminals for visible damage, corrosion, or loose connections and reseat them if needed. Testing the thermistor itself requires a multimeter to measure resistance at the component terminals. If the thermistor or wiring needs replacement, those are relatively accessible repairs, but control board replacement is better handled by a qualified technician.
Will resetting the dryer clear the Err3 code?
A power reset may temporarily clear the error code and allow the dryer to start, but if the underlying fault in the thermistor or circuit persists, Err3 will return. Resetting without repairing the root cause is not a lasting solution and could pose a safety risk since the dryer is operating without reliable exhaust temperature monitoring.
Is it safe to use my Fisher & Paykel dryer while Err3 is showing?
No, it is not advisable to continue using the dryer while Err3 is active. The exhaust NTC thermistor is a key safety component that helps prevent overheating. Without an accurate reading from this sensor, the dryer cannot properly regulate heat, which could create a fire hazard. The dryer should remain out of service until the fault is diagnosed and repaired.
How much does it cost to repair an Err3 fault on a Fisher & Paykel dryer?
Repair costs vary depending on the failed component. A replacement NTC thermistor is generally an inexpensive part, typically in the range of $15 to $50, while labor for a service call commonly adds $80 to $150 or more depending on your location. If the control board is at fault, board replacement can bring the total repair cost to $200 to $400 or higher. Getting a diagnosis before committing to parts is recommended.

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