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Error code reference

Fisher & Paykel Dryer Error Code 8

Exhaust sensor over temperature

Fisher & Paykel codesFisher & Paykel dryer codes

Exhaust sensor over temperature – the exhaust sensor measures over temperature (element short circuit or low resistance).

First step from the service manual

Check the integrity of the sensor circuit, checking particularly for short circuits.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 8 means on a Fisher & Paykel dryer

Error code 8 on a Fisher & Paykel dryer indicates that the exhaust sensor has detected a temperature reading beyond the acceptable upper limit. The exhaust sensor monitors the temperature of air leaving the drum to ensure the dryer operates within safe thermal parameters. When this sensor reports an over-temperature condition, the control board interprets it as a potential fault in the heating circuit, specifically pointing toward a short circuit within the heating element or a resistance value that has dropped below specification, causing excessive heat output.

The most critical distinction with this fault code is that it implicates the heating element circuit directly. A shorted heating element or one with abnormally low resistance will draw excessive current and generate more heat than the system is designed to handle. Rather than simply cycling off at the correct temperature, the element continues to produce heat, driving exhaust temperatures above safe limits. The exhaust sensor itself may be functioning correctly, accurately reporting a genuine over-temperature condition caused by an uncontrolled heating element.

Diagnosis should begin with a thorough inspection of the sensor circuit wiring for any short circuits, damaged insulation, or pinched wires that could cause a false high-temperature reading. If the sensor circuit checks out, testing the heating element's resistance is the logical next step. A shorted element will typically show near-zero resistance or a direct short to ground. Either the sensor circuit or the element itself will generally be at the root of this fault.

Source: manufacturer service documentation.

Common causes of 8

  1. 01

    Shorted heating element

    Part replacement

    A heating element that has shorted internally or developed very low resistance will generate excessive, uncontrolled heat. This is the primary suspect when the exhaust sensor reports over-temperature, and it can be confirmed by measuring the element's resistance with a multimeter.

  2. 02

    Short circuit in the sensor wiring

    Wiring / connection

    Damaged, pinched, or burned wiring in the exhaust sensor circuit can create a short that causes the control board to read an artificially high temperature signal. Inspect all wiring connections and insulation along the sensor harness for signs of damage or contact with hot surfaces.

  3. 03

    Faulty exhaust temperature sensor

    Part replacement

    The sensor itself may have failed internally, producing a resistance value that the control board interprets as an over-temperature reading. Testing the sensor's resistance output against expected specifications will confirm or rule out this cause.

  4. 04

    Connector corrosion or poor connection

    Wiring / connection

    Corroded or loose connectors in the sensor circuit can alter the electrical signal and simulate a short circuit condition. Cleaning or reseating the connectors at both the sensor and control board ends is a worthwhile step before replacing components.

  5. 05

    Control board fault

    Part replacement

    In rare cases, the control board may incorrectly interpret sensor signals or fail to regulate the heating circuit properly, resulting in a false or legitimate over-temperature fault. The board should only be considered after the sensor circuit and heating element have been ruled out.

See the test procedure for each cause

Frequently asked questions about 8

What does 8 mean on a Fisher & Paykel dryer?
Error code 8 on a Fisher & Paykel dryer means the exhaust temperature sensor has detected an over-temperature condition. This points to either a short circuit in the heating element, abnormally low element resistance causing excessive heat, or a fault within the exhaust sensor circuit itself. The dryer has flagged this as a safety-related fault that needs to be diagnosed before resuming use.
Can I fix error code 8 on my Fisher & Paykel dryer myself?
A knowledgeable DIYer can begin by inspecting the sensor circuit wiring for visible damage, pinched wires, or loose connectors, which requires no replacement parts. Testing the heating element's resistance with a multimeter is also within reach for someone comfortable with basic electrical diagnostics. However, if the element or sensor needs replacement, the repair involves working near high-voltage components, so professional service is advisable if you are not experienced with appliance electrical systems.
Is it safe to keep using my dryer when error code 8 appears?
No, you should stop using the dryer until error code 8 has been resolved. This fault indicates that exhaust temperatures are exceeding safe limits, most likely due to a heating element that is not being properly controlled. Continuing to run the dryer under these conditions creates a risk of overheating internal components and, in a worst case, a fire hazard.
Will resetting my Fisher & Paykel dryer clear error code 8?
A reset may temporarily clear the code from the display, but the underlying fault will cause it to return once the dryer runs again. Error code 8 is triggered by an active hardware condition, either a shorted or low-resistance heating element or a sensor circuit fault, and resetting the appliance does not correct either of those issues. The fault must be properly diagnosed and repaired for the error to stay clear.
How much does it cost to repair error code 8 on a Fisher & Paykel dryer?
Repair costs depend on what component is at fault. If the issue is only loose or corroded wiring connections, the cost may be limited to a service call fee, typically in the range of $80 to $150. Replacing a heating element or exhaust sensor generally adds $50 to $200 in parts, with total repair costs commonly falling between $150 and $400 depending on labor rates and parts pricing in your area.

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