This glossary entry has ntc sensor explained for owners trying to understand the temperature readings behind their Fisher & Paykel appliance. An NTC sensor (Negative Temperature Coefficient thermistor) is a temperature-sensing component used in virtually every Fisher & Paykel appliance to measure and regulate temperature. “Negative Temperature Coefficient” means its electrical resistance decreases as temperature increases — the control board reads this resistance to determine the exact temperature, whether it is governing an AeroTech oven cavity or an ActiveSmart refrigerator.
How it works
The NTC sensor is a small probe — typically a thin metal cylinder about 1-2 inches long with a wire lead. The sensing element inside is a semiconductor material whose resistance changes predictably with temperature. At room temperature (77°F / 25°C), a typical NTC sensor reads approximately 10,000-50,000 ohms (varies by type). At 350°F (177°C), it might read 500-1,000 ohms. The control board continuously reads this resistance value and converts it to a temperature reading.
Where NTC sensors are used
Ovens and ranges
The oven cavity NTC sensor is a probe mounted through the rear wall, with the tip extending into the oven space. It tells the control board the current oven temperature so it can cycle the heating element on and off to maintain the set temperature. A failed oven NTC sensor triggers error codes E011 (open circuit) or E012 (short circuit). See our guide: How to Calibrate Your Fisher & Paykel Oven Temperature.
Dishwashers
Measures wash water temperature. The control board uses this to determine when to activate the heating element and when the water has reached the selected cycle temperature. A failed dishwasher NTC can cause cold washes (poor cleaning) or overheating (potential damage to plastic items).
Washers
Monitors water temperature in the drum. Ensures hot cycles actually reach hot temperatures and cold cycles don’t overheat. Also used in the SmartDrive motor to prevent overheating during extended spin cycles.
Dryers
Multiple NTC sensors monitor air temperature at the drum inlet, outlet, and in the heat pump circuit (on heat pump models). These readings determine drying intensity and prevent overheating.
Common failure modes
- Open circuit — The sensor wire breaks internally. Resistance reads infinite (the control board sees no sensor). Triggers an error code immediately.
- Short circuit — The sensor element shorts. Resistance reads near zero (the board sees extreme high temperature). Triggers an error code.
- Drift — The sensor still works but reads inaccurately. This is harder to detect — the oven may run 20°F too hot or too cold without triggering an error code. If cooking results have changed, NTC drift is a possible cause.
Testing an NTC sensor
Unplug the appliance. Disconnect the sensor wires. Use a multimeter to measure resistance at room temperature and compare to the manufacturer’s specification (found in the service manual for your Fisher & Paykel model). A reading far outside specification (or no reading at all) confirms failure. NTC sensors are inexpensive parts (from $15) and usually easy to replace.
If you’re experiencing temperature-related issues or error codes on any Fisher & Paykel appliance, schedule diagnostics for testing by an experienced technician.
Ntc sensor explained: why it matters for your oven
A drifting or failed thermistor is one of the most common reasons a Fisher & Paykel oven stops holding its set temperature, so understanding this little probe saves a lot of guesswork before you ever reach for a tool. Because the same part type appears across ovens, dishwashers, washers, and dryers, the multimeter test described above applies almost everywhere — only the expected resistance value changes from one model to the next. When the figure on your meter sits far from the service-manual spec, you have isolated the fault to the sensor rather than the costly control board behind it.
Have your oven’s model and serial number ready from the rating plate before ordering a replacement, since the correct thermistor resistance curve is matched to the specific build. Our independent technicians keep these sensors on hand through trusted parts suppliers and stand behind each fitting with a 30-day labor warranty. If the display is already showing E011, E012, or another fault, our error code reference explains what the board has detected. For a calibration that won’t hold or a sensor reading you can’t interpret, schedule professional service and let an experienced technician confirm the diagnosis.
