Sharp Microwave Error Code CC4

CC4 means the magnetron relay inside the relay unit has reached its designed operational limit of 200,000 switching cycles. The touch control unit and relay unit track this count together, and once the threshold is hit, the code is triggered. This is a lifecycle alert indicating the relay unit needs to be replaced.

No. The CC4 code is generated by the relay unit and touch control unit tracking cumulative cycle data, not a temporary fault condition. Power cycling or unplugging the microwave will not reset the counter or clear the code. The only resolution is replacing the relay unit.

Repair costs vary depending on parts availability and labor rates in your area. Relay unit parts alone typically range from $30 to $80, while professional labor can add $80 to $150 or more to the total. Given the age of a microwave that has logged 200,000 relay cycles, it is worth comparing the repair cost against the cost of a replacement unit before proceeding.

Replacing the relay unit involves working near high-voltage components inside the microwave cabinet, which can retain lethal charge even when unplugged. While a skilled DIYer with appliance repair experience may be able to perform the swap, most homeowners should have a qualified technician handle this repair. Always discharge the high-voltage capacitor before servicing the interior of any microwave.

Continued use is not recommended once CC4 appears. The relay has exceeded its rated cycle life, and the contacts may be worn to a point where arcing, inconsistent heating, or relay failure could occur. Operating the unit in this condition could cause further damage to connected components including the magnetron itself.