F4Warning
Haier Oven/Range F4 Error Code
The oven temperature sensor circuit has an open connection, causing no resistance reading.
Common causes
- Open (broken) oven temperature sensor
- Disconnected sensor wiring
- Corroded sensor terminal
How to fix it
- Unplug the oven.
- Locate the sensor and check that the connector is fully seated.
- Measure sensor resistance; infinite ohms indicates open sensor.
- Replace sensor if open.
⚠ When to call a pro: If sensor is good but wiring is broken, repair or replace wiring. If not, control board issue.
Part links are affiliate links — as an Amazon Associate we may earn a small commission at no extra cost to you.
Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.