e3
Moderate
Trane · HVAC Systems (AC, Furnaces & Heat Pumps)
Compressor Overcurrent Protection
Quick Answer
Error code E3 on your Trane HVAC Systems (AC, Furnaces & Heat Pumps) means: Compressor Overcurrent Protection. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Measure compressor amperage with a clamp meter and compare to the rated load amps (RLA) on the nameplate
2
Check voltage at the outdoor unit disconnect (should be within 10% of rated voltage)
3
Test the compressor start capacitor and run capacitor with a multimeter
4
Test contactor coil and contact resistance
5
If compressor amperage significantly exceeds RLA, compressor replacement by a licensed HVAC technician is required
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Compressor start/run capacitor
Contactor
Hard start kit
Compressor (if failed)
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