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Appliance Error Codes

Carrier 25HCC318A003 Heat Pump Error Codes

25HCC318A003 Error Code Reference

Section titled “25HCC318A003 Error Code Reference”

Carrier Comfort series 18000 BTU heat pump, R410A

Error CodeFault Description
E2Indoor thermistor fault
E3Indoor coil thermistor fault
E4Outdoor thermistor fault
E6Communication fault
HPHigh pressure protection
LPLow pressure protection