mypros+
Error code reference

Fisher & Paykel Dishwasher Error Code F30

Invalid temperature

Fisher & Paykel codesFisher & Paykel dishwasher codes

Invalid temperature - temperature sensor reading is out of expected range.

First step from the service manual

Check if the thermistor is damaged or disconnected.

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

MyPros+ Max

Get the full diagnostic procedure for F30.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F30 means on a Fisher & Paykel dishwasher

The F30 error code on a Fisher & Paykel dishwasher indicates that the temperature sensor, known as a thermistor, is returning a reading that falls outside the expected operating range. The thermistor is a resistive temperature-sensing component that the control board monitors continuously to regulate wash and rinse water temperatures. When the board detects a signal that is either too high or too low to represent a valid temperature, it throws the F30 fault and typically halts the cycle to prevent potential damage from overheating or underheating.

The most common trigger for F30 is a fault with the thermistor itself. This includes physical damage to the sensor body, a broken or corroded connector, or a wire harness that has become disconnected from the thermistor. A damaged thermistor may read as an open circuit or a short, both of which produce out-of-range resistance values that the control board interprets as an invalid temperature signal.

Beyond the thermistor, wiring between the sensor and the control board can degrade over time due to heat, moisture, or vibration inside the dishwasher cavity. A loose pin in the connector, chafed insulation causing a short to ground, or corrosion at terminal contacts can all produce erratic or implausible sensor readings. In less common cases, the control board itself may fail to correctly interpret an otherwise functional thermistor signal, though the sensor and wiring should always be inspected and tested first.

Source: manufacturer service documentation.

Common causes of F30

  1. 01

    Damaged thermistor

    Part replacement

    The thermistor may have cracked, burned, or failed internally, causing it to send a resistance value outside the valid range. Visually inspect the sensor for any signs of physical damage or discoloration.

  2. 02

    Disconnected thermistor connector

    Wiring / connection

    The wiring connector to the thermistor can vibrate loose over time, cutting off the signal to the control board entirely. Check that the connector is fully seated and that no pins have backed out of the housing.

  3. 03

    Corroded or damaged wiring harness

    Wiring / connection

    Moisture and heat inside the dishwasher can corrode terminal pins or degrade wire insulation, leading to shorts or open circuits in the sensor circuit. Inspect the harness from the thermistor to the control board for corrosion, chafing, or breaks.

  4. 04

    Short circuit in the sensor wiring

    Wiring / connection

    A wire that has chafed against a sharp edge or the dishwasher frame can create a short to ground, producing a signal that reads as an invalid temperature. Trace the wiring carefully and look for worn insulation.

  5. 05

    Faulty control board

    Part replacement

    If the thermistor and all wiring test within specification, the control board may be failing to correctly process the temperature signal. This is the least likely cause and should only be considered after the sensor and harness have been ruled out.

See the test procedure for each cause

Frequently asked questions about F30

What does F30 mean on a Fisher & Paykel dishwasher?
F30 means the dishwasher's control board has detected a temperature sensor reading that is outside the expected range. The thermistor, which monitors water temperature during the wash cycle, is either sending an implausible signal or no signal at all. The appliance stops the cycle to prevent operating at an uncontrolled temperature. The first step is to check the thermistor and its wiring for damage or disconnection.
Can I fix the F30 error myself?
Some causes of F30 are DIY-friendly, such as reseating a disconnected thermistor connector or cleaning a corroded terminal. However, if the thermistor itself has failed or the wiring harness is damaged, replacing components inside a dishwasher requires comfort with disassembly and basic electrical testing. If you are not familiar with multimeter testing or appliance wiring, a qualified technician is the safer option.
Is it safe to keep using my dishwasher when F30 is showing?
It is not recommended to continue running the dishwasher while the F30 error is active. The thermistor is what allows the control board to regulate water temperature, and without a valid temperature signal, the appliance cannot confirm safe operating conditions. Running the machine in this state could result in dishes not being properly sanitized or, in a worst case, an overheating event.
Will resetting my Fisher & Paykel dishwasher clear the F30 error?
A reset may temporarily clear the error code, but if the underlying cause, such as a faulty thermistor or loose connector, has not been addressed, the F30 fault will return when the dishwasher runs again and the control board re-checks the sensor. A reset is useful for confirming whether the fault is intermittent, but it is not a repair.
How much does it cost to repair an F30 error on a Fisher & Paykel dishwasher?
Repair costs vary depending on the root cause. If only a connector needs to be reseated or a wiring issue corrected, the cost may be limited to a service call fee, typically in the range of $80 to $150. A thermistor replacement is generally an affordable part, with total repair costs including labor often falling between $100 and $250. If the control board is at fault, costs can rise considerably, potentially ranging from $200 to $400 or more depending on parts availability and labor rates in your area.

Related Fisher & Paykel dishwasher codes

All Fisher & Paykel dishwasher codes
View all 51 Fisher & Paykel dishwasher codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass