E16
Atlantic
Fan Output Driver Failure
E16 error and thermostat indicates internal fan control fault.
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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
Burnt fan relay or triac, Overloaded fan output (multi‑speed fan wired incorrectly), Short circuit on G terminal, PCB trace damage
How to Fix / Troubleshooting
Safety first: Turn off power to the air handler and thermostat at the breaker. Fan circuits carry mains or 24 V depending on system type.
- Step 1 – Verify configuration: In the installer menu, confirm the correct fan type (on/off vs multi‑speed) is selected for your Atlantic thermostat model.
- Step 2 – Check wiring: Inspect the G (fan) terminal wiring at the thermostat and air handler. Ensure only the correct fan control wire is connected and that it is not shorted to other terminals.
- Step 3 – Test fan manually: Set the fan mode to On from the thermostat. If E16 appears and the fan does not run, suspect an output fault.
- Step 4 – Measure output (advanced): With power on and extreme caution, measure voltage at the fan output when commanded on. No voltage indicates a failed driver.
- Step 5 – Replace thermostat: If the fan driver component is burnt or non‑functional, replace the thermostat base or entire thermostat. Correct any wiring issues before reconnecting.
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Repair Difficulty
Hard
4/5
Required Part
Fan Output Relay/Triac
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