Samsung Range Error Code C-42

The C-42 code on a Samsung range means the temperature sensor on the main PCB has shorted while the oven is running. This sensor monitors the control board's own temperature to prevent heat damage. When it shorts, the board detects an invalid reading and stops normal operation. The fix requires replacing the main PCB.

You should not continue using the range while the C-42 code is active. The PCB temperature sensor is a protective component, and operating without a functioning sensor means the control board has no protection against overheating. Continuing to run the oven in this state risks further electrical damage to the appliance.

Repair costs depend on parts and labor in your area. A replacement main PCB for a Samsung range typically falls in the range of $100 to $300 for the part alone, depending on the model. If you hire a technician, expect additional labor charges that can bring the total to $200 to $500 or more. Getting a quote before proceeding is advisable, as in some cases the repair cost may approach the value of an older unit.

A technically experienced DIYer can address this repair by disconnecting power, removing the rear access panel, and replacing the main PCB. The repair does not require specialized tools beyond basic hand tools and proper anti-static precautions when handling the board. However, if you are not comfortable working inside the appliance's electrical components, a qualified technician is recommended.

A power reset may temporarily clear the code from the display, but it will not resolve the underlying shorted sensor condition. Because the sensor fault is a hardware failure on the main PCB, the C-42 code will return once the oven is operated again. Board replacement is required to permanently resolve the fault.