What to do if flue gas sensor is faulty in Wolf CGB-2?
- RRichard CarrAug 30, 2025
If your Wolf Boiler displays 'Flue gas sensor faulty,' it indicates that the flue gas sensor or sensor lead has a short circuit or break. Check the leads and plug-in connections of the flue gas temperature sensor. If the electrical connection is OK but there is no function, replace the sensor.