ComBi
line
03/04
95
E0
Problem taking the temperature of hot
water system.
Call the service engineer or dealer.
E1
Problem taking the temperature of hot
water system.
Call the service engineer or dealer.
Error message
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Possible cause
Action
B7 (boiler)
Minimum electrode fault.
Call the service engineer or dealer.
B8 (boiler)
Error C3 changes to C8 after approx. 10
minutes. The inlet valve is closed for safety.
Check the water pressure, turn the water supply
taps completely open, check the connecting
hose is fastened. Restart the hot water system.
Max. electrode is not reached. After approx.
10 minutes the inlet valve closes.
Error message
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Possible cause
Action