E16
Dettson
Line Voltage Polarity / Ground Fault
Dettson furnace shows E16; unit may operate but with abnormal fan behavior or intermittent shutdowns.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Reversed hot and neutral at furnace power feed, Missing equipment ground, Shared neutral with other circuits, Electrical noise affecting control board
How to Fix / Troubleshooting
Safety first: This involves line voltage. If you are not comfortable working with 120 VAC, contact an electrician.
- 1. Verify receptacle or disconnect wiring: Use a plug-in tester or multimeter to confirm that hot, neutral, and ground are correctly wired at the furnace power source.
- 2. Check furnace junction box: With power off, open the furnace electrical junction box. Confirm that hot, neutral, and ground are connected according to the wiring diagram.
- 3. Inspect ground connection: Ensure the furnace cabinet is bonded to the electrical ground. Tighten any loose ground screws.
- 4. Correct wiring issues: Any polarity or grounding problems should be corrected by a qualified electrician. Once corrected, cycle power and confirm E16 clears.
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Repair Difficulty
Hard
4/5
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