Unit runs about 3 minutes then shuts down. I can reset it and same result happens. I found some water in exhaust duct and suspect water in heat exchanger jacket. ?? we've had heavy rains in last week and I think moisture is an issue. I blew out the burner area as suggested by the manufacturer with no improvement. I'm hoping the issue corrects itself as the moisture evaporates.
Code 13 is a lack of combustion air in the area, or poor combustion. try getting some more air in the room with a fan and see if it runs
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The problem has resolved itself. It's now working fine. I suspect that with the heavy rains we had, water blew into the vent. The vent rises about a foot off the water heater then goes horizontal through the wall for about four feet, then vertical for a foot with a 90 degree elbow on top with a screened vent cap on that. It's obvious that the water got into the vent with no way out except to the water heater itself.I suspect the water clogged the vent exhaust and thus the c4/13 code. The vent is better protected from the elements now.
is the water heater vent vertical or does it go horizontal at an angle and does the vent have the proper cap at top?
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