Cause of error code L47

Flue pressure switch open time longer than 60 minutes

Solution for error code L47

- If ther’is an obstruction, it must be removed.
- If the fl ue pressure switch is not correctly set, it must be replaced.
- If the fl ue sensor resistance does not correspond, it must be replaced.
- if the electrical circuit is damaged, it must be repaired. 

If the previous four cases do not apply, replace the power control board