KitchenAid Cooktop Error Code F-42

F-42 indicates a power supply fault where the power control board or EMI filter board is detecting incorrect or missing voltage from the 240 VAC supply. The cooktop requires a properly balanced two-leg 240 VAC input to operate. This code can be caused by a tripped breaker, a loose wiring connection, a damaged supply cable, or a failed internal board. The unit will not function until the fault is resolved.

No. The F-42 code indicates the cooktop is not receiving correct power, and the unit will typically disable itself to prevent damage. Attempting to operate the cooktop under these conditions is not safe. The underlying power supply issue should be diagnosed and corrected before resuming use.

Repair costs vary widely depending on the root cause. If the fix is simply resetting a tripped breaker or tightening a connection, the cost is minimal. Replacing a supply cable or internal board typically involves both parts and labor, with total repair costs commonly ranging from $150 to $450 or more depending on the specific parts needed and local labor rates. Getting a diagnostic estimate from a technician before authorizing board replacement is advisable.

Some causes of F-42 are accessible to a knowledgeable DIYer, such as resetting a tripped circuit breaker or tightening a loose terminal connection at the cooktop's junction box. However, any work involving 240 VAC wiring or internal board replacement carries serious electrical safety risks and should only be performed by someone comfortable working with high-voltage appliances. If you are not experienced with electrical diagnostics, hiring a licensed technician is the safer choice.

A power reset by turning off the circuit breaker for 30 seconds and restoring power may temporarily clear the code, but it will return if the underlying power supply fault has not been corrected. F-42 is not a soft error that resolves on its own. A reset is useful only as a diagnostic step to confirm whether the fault is intermittent or consistent, not as a repair.