Component guide
Thermistor / temperature sensor
Changes electrical characteristics with temperature so the control can infer temperature.
What it does
Changes electrical characteristics with temperature so the control can infer temperature.
Symptoms that can involve this component
Temperature codes, overheating/underheating, erratic cycling.
Other causes that can look similar
Sensor drift/open/short, wiring/connector, airflow/icing affecting reading.
Homeowner-safe observations
Record the exact error code, when it occurs, noises, visible water/frost, and whether the problem is consistent. Use only user-accessible filters, vents, hoses or controls described in the owner manual.
When service is appropriate
Internal electrical measurements, energized testing, gas work, sealed refrigeration work and component replacement should be handled according to the manufacturer service information by a competent person.