PROBLEM: Warning for the "991" error code.įIX: Check for blockage in the vents, the distance between the intake and exhaust terminals are per instructions and remove if there is grease or dirt in the gas burner and fan motor.įIX: Check is the Hi-limit switch properly functioning that there is no loose or broken wire connections, no soot on the flame rod or damaged computer board. Smith Water Heater error code guide will explain common issues, provide tips, and show you how to read your model's error codes.įIX: Check for the proper settings on the computer board. Smith Water Heater, look no further! Our comprehensive A.O. If you're looking for help fixing your A.O.
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