A026_F: Line and Neutral Reversed or Poor Ground
Status
This is a critical fault. The furnace will not operate in gas heat or any other modes.
Description
This fault code is an indication that line voltage and neutral are reversed to the furnace control or may also bean indication of a grounding issue. No operation is not allowed to proceed until the problem is corrected.
Expected Operation
No heating or cooling operation will take place.
Cause
1. Line and neutral to the furnace have been interchanged at the furnace.
2. Line voltage and neutral have been interchanged at the disconnect or at the breaker box.
3. Furnace control cannot properly sense ground.
Solution
1. Check voltage with meter and reverse line and neutral if necessary.
2. Check voltage with meter and reverse line and neutral if necessary.
3. Check ground wire inside furnace cabinet is attached to sheet metal, verify ground to furnace cabinet and at breaker box.
