When your Frigidaire oven fan won't turn off, first allow the oven to cool completely. The cooling fan may run for more than an hour after the oven is turned off, especially after a high-temperature cycle, and this is normal. If the oven fan keeps running after the oven has cooled, a failed relay is the most likely problem. The oven control board, control board, or main control board may be sending continuous voltage to the fan motor because a relay is stuck closed, although control boards are often misdiagnosed. Check the wiring diagram and test the oven thermostats before replacing a board. A defective high-limit thermostat can continue powering the fan after the oven cools, while a thermostat with contacts stuck closed can cause the same symptom. Use a multimeter to test thermostat continuity according to the appliance service information. This troubleshooting applies to an oven fan not turning off, an oven fan that keeps running, or a cooling fan that runs continuously. Enter your Frigidaire range model number to find the exact replacement part for your specific oven, including the correct control board, high-limit thermostat, thermostat, or fan-related part.
01 - Frigidaire Range/Stove/Oven Oven Control Board
The oven control board has relays that regulate power to the bake, broil and fan circuits according to the user settings and sensor input. If one of these relays shorts out, the control board may send continuous voltage to the oven fan. However, this is rarely the case. Before replacing the control board, first check the oven thermostats. If an oven thermostat fails, it may cause the oven fan to run continuously.
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If the oven fan is not shutting off, a relay on the control board may be stuck closed sending constant power to the oven fan. Check the wiring diagram first before replacing the board. Control boards are often misdiagnosed.
03 - Frigidaire Range/Stove/Oven Main Control Board
The main control board has relays that send voltage to the fan motor. If one of the control board relays shorts closed, the control board may send continuous voltage to the fan. If the fan continues to run after the oven is turned off and cooled down, the main control board is likely defective. If the control board is defective, replace it.
The oven cooling fan may run well over an hour after the oven is shut off to cool down the components. The hotter the temperature was set the longer the cooling fan needs to run to cool off the oven. This is normal.
Less Common
05 - Frigidaire Range/Stove/Oven High Limit Thermostat
The high limit thermostat sends voltage to the oven fan as the oven heats up. If the high limit thermostat is defective, it may keep sending voltage to the oven fan after the oven has cooled down. To determine if the high limit thermostat is at fault, use a multimeter to test the thermostat for continuity. If the high limit thermostat does not have continuity, replace it.
The thermostat sends voltage to the oven fan as the oven heats up. If the thermostat contacts are stuck closed, the thermostat may continue to send voltage to the oven fan after the oven has cooled down. To determine if the thermostat is at fault, use a multimeter to test the thermostat for continuity. If the thermostat shows continuity at any temperature, this indicates that the thermostat is defective. If the thermostat is defective, replace it.