A 14 code means the thermal fuse (white wire which wraps around the heat exchanger) has snapped. This occurs if the heat exchanger reaches a dangerously high temperature. To correct this error code you need to replace the thermal fuse and keep the heat exchanger from over heating. Typical reasons the heat exchanger over heats are:
1) scaling in the heat exchanger 2) combustion chamber dirty and burning hot
Answers & Comments
A 14 code means the thermal fuse (white wire which wraps around the heat exchanger) has snapped. This occurs if the heat exchanger reaches a dangerously high temperature. To correct this error code you need to replace the thermal fuse and keep the heat exchanger from over heating. Typical reasons the heat exchanger over heats are:
1) scaling in the heat exchanger
2) combustion chamber dirty and burning hot