Whirlpool Dryer Error Code F:24

F:24 indicates that the inlet thermistor circuit is open, meaning the control board detects a complete break in the signal from the air inlet temperature sensor. This code only appears during the dryer's diagnostic test mode, not during a standard drying cycle. It points to a problem with the thermistor itself, its wiring, or the connector in that circuit.

Since F:24 only appears in diagnostic mode and not during normal operation, the dryer may still run cycles. However, a non-functional inlet thermistor can impair the control board's ability to regulate temperature accurately, which could lead to overheating or poor drying performance over time. It is best to address the fault before continuing regular use.

If the inlet thermistor is the failed component, the part itself typically costs in the range of $15 to $40, making it a relatively low-cost repair. If professional labor is involved, total repair costs generally range from $75 to $200 depending on the technician's rates and the extent of any wiring damage. Control board replacement, if required, is significantly more expensive and can range from $150 to $400 or more for parts and labor.

A knowledgeable DIYer can attempt this repair by running the diagnostic test, then following test #4a to isolate the fault to the thermistor or its wiring. If the thermistor tests open with a multimeter, replacing it is a straightforward part swap. If the wiring or connector is the issue, repairing or replacing the affected section is also manageable with basic electrical skills. If the control board is suspected, professional diagnosis is recommended.

Because F:24 only surfaces during the diagnostic test mode, it will not appear on the display during a standard reset or power cycle. However, the underlying fault will still be present and will reappear the next time diagnostics are run. Clearing the code permanently requires repairing or replacing the defective component in the inlet thermistor circuit.