Bosch Refrigerator Error Code C1

The C1 code means the compressor has been running for more than 3 hours continuously while the freezer door sensor or refrigerator door sensor temperature remains above 23 degrees Fahrenheit. This tells the control board that the refrigeration system cannot reach its target temperature within a normal cycle. The most common cause is a refrigerant leak, but condenser issues and failed sensors can also trigger this code.

The C1 fault itself is not an immediate safety hazard, but it does mean your refrigerator is not maintaining safe food storage temperatures. Food stored in a refrigerator running a C1 error may reach temperatures that promote bacterial growth. Address the fault promptly and check internal temperatures with a thermometer to determine if food is still safe.

Resetting the refrigerator may temporarily clear the C1 code from the display, but the fault will return if the underlying problem is not corrected. Because the code triggers only after the compressor has run for over 3 hours without achieving temperature, it represents a real system condition rather than a transient glitch. A proper diagnosis and repair of the root cause is necessary to permanently resolve the code.

Some causes, such as cleaning dirty condenser coils or confirming the condenser fan is running, can be checked by a knowledgeable DIYer. However, if the root cause is a refrigerant leak, a sealed system restriction, or a failed compressor, the repair requires EPA Section 608 certified technicians and specialized equipment. Attempting to add refrigerant without proper certification and tools is not recommended.

Repair costs vary significantly depending on the root cause. Cleaning condenser coils is inexpensive, typically in the range of $50 to $150 for a service call. A refrigerant recharge or leak repair can range from $200 to $600 or more. Compressor replacement is the most expensive repair, often ranging from $400 to $900 or higher depending on labor and parts availability.