Bosch Indoor Unit EEPROM Configuration Error

C1 appears and the unit may not respond correctly to remote control commands.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Corrupted configuration data, Incorrect PCB replacement without proper setup, Power surge affecting memory, Faulty indoor main PCB

Safety first: Turn off power before accessing electronics.

Steps:

Power reset: Turn off the breaker for 10–15 minutes and then restore power.
Check model configuration: If the indoor PCB was recently replaced, it may require configuration via Bosch service remote or DIP switch settings according to the service manual.

Resolution: Usually requires a Bosch technician to reprogram or replace the indoor PCB.

Professional Required 5/5

Indoor Main Control PCB

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