Fisher & Paykel Range Error Code 30 F0

Error code 30 F0 on a Fisher & Paykel range indicates a short-circuit condition or physical damage detected in temperature probe ST1, which is the primary oven cavity temperature sensor. This probe is a resistive sensor (typically an NTC or RTD type) that continuously reports oven temperature to the main PCB so the control system can regulate heating elements accurately. When the PCB detects an out-of-range or shorted signal from ST1, it triggers this fault and interrupts normal oven operation to prevent uncontrolled heating.

A short-circuit in the probe circuit means the PCB is reading an abnormally low resistance value, which can be caused by damaged wiring, a failed probe element, or compromised insulation along the sensor cable. The fault can also originate at the connection point between the probe cable and the PCB itself, where corrosion, a loose terminal, or a bent pin can create an unintended electrical path that mimics a short. Physical damage to the probe cable, such as pinching, melting from proximity to a heating element, or rodent damage, is another common source.

Diagnosis begins by switching the oven function selector to OFF and allowing the 30-minute countdown to complete. After the cooldown, the probe, its wiring harness, and the PCB connector should all be inspected. Resistance across the ST1 probe terminals should be measured and compared against the expected value for the oven's current ambient temperature. A reading near zero ohms confirms a short in the probe or cable, while a correct resistance reading shifts suspicion to the PCB connector or the PCB itself.