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ERROR CODE: F49
ERROR TYPE: Modulating room thermostat communication error
PROBABLE CAUSE: Room thermostat is defective or there is a connection problem
SOLUTION:
1- Turn the device off and on.
2- Check the connection and conductivity of the cable between the room thermostat and the boiler and check for any damage. If there is a problem, replace the cable.
3- If the room thermostat is working properly, replace the mainboard.
Updated on 9 January 2024, Tuesday
