e2
Moderate
Carrier · Central Air Conditioners & Furnaces
Indoor Coil Freeze Protection
Quick Answer
Error code E2 on your Carrier Central Air Conditioners & Furnaces means: Indoor Coil Freeze Protection. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Turn system to fan-only mode to thaw the evaporator coil (may take 1-4 hours)
2
Check and replace the air filter
3
Inspect the evaporator coil for dirt buildup and clean if accessible
4
Once thawed, check refrigerant charge by measuring superheat and subcooling
5
Verify blower motor is operating at the correct speed for cooling mode
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
Air filter
Evaporator coil cleaner
Refrigerant (if low charge is confirmed)
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