Fisher & Paykel Ovens F3 Error: RTD sensor short-circuit
Fisher & Paykel oven error code F3 is a high-severity fault meaning Oven RTD temperature sensor short-circuit fault. A shorted RTD sensor may cause the oven to overheat dangerously before the controller registers a fault. F3 caused by a physically shorted RTD probe or wiring will not clear with a power-cycle.
~60%
DIY Fixable
From $130
Typical Repair Cost
1–2 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A shorted RTD sensor may cause the oven to overheat dangerously before the controller registers a fault. Do not operate the oven until the sensor has been replaced and the fault code cleared.
Can I reset the code?
No. F3 caused by a physically shorted RTD probe or wiring will not clear with a power-cycle. The faulty component must be replaced before the oven will operate safely.
When to stop immediately?
Stop if you notice: Any sign of oven overheating alongside F3, Code returns immediately after every power-cycle.
Symptoms You May Notice
F3 displayed with no heating
The oven shows F3 on the panel and refuses to energise any element, as the controller detects an impossibly low resistance from the sensor.
Oven temperature reads abnormally low
Before shutting down, the display may briefly show a very low or zero temperature reading because the shorted RTD reports near-zero resistance.
Oven overheats before fault triggers
In some cases the controller drives maximum heat output trying to reach a setpoint the shorted sensor never registers, and F1 (overtemperature) appears before F3 is logged.
Possible Causes
RTD probe short-circuit
Moisture ingress, physical damage, or age has caused the RTD element to short internally, producing near-zero resistance.
DIY PossiblePinched sensor lead wiring
The sensor lead has been pinched between oven panels, causing the two conductors to contact each other and simulate a short.
DIY PossibleControl board input fault
A shorted component on the PCB sensor input circuit mimics the signature of a shorted RTD.
Requires ProfessionalSafe Checks You Can Do
-
1
Power-cycle and observe
Switch off the circuit breaker for 5 minutes, restore power, and see if F3 reappears immediately or only after a heating command.
A code that appears only after the oven heats suggests a heat-induced short in the wiring or probe.
-
2
Test RTD resistance with sensor disconnected
With the oven unplugged, disconnect the RTD sensor connector and measure the sensor leads directly. A short-circuited probe reads 0–10 Ω at room temperature rather than the expected ~1,100 Ω.
Also measure across the disconnected harness wires at the board end to confirm the short is in the sensor side, not the board side.
Tools required -
3
Inspect sensor lead routing
Trace the RTD lead from the probe through any grommets or clips to the control board connector. Look for pinch points where the wire passes near sheet metal edges.
A multimeter set to continuity mode can quickly identify a wire-to-wire short within the harness without removing the oven from the cabinet.
Tools required
When to Call a Professional
Contact a qualified technician if:
- F3 persists after RTD replacement — board input fault likely
- Sensor lead routing requires significant disassembly to inspect or replace
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