Carrier Mini Split Error Codes
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Featured codes
- EC51 — EC51 means outdoor-unit EEPROM parameter error - the outdoor control is not reading o
- EC52 — EC52 means outdoor coil temperature sensor error - the outdoor coil (T3) reading is i
- EC53 — EC53 means outdoor ambient temperature sensor error - the outdoor air (T4) reading is
- H60 — H60 means indoor room temperature sensor (T1) error - the unit cannot trust the room-
- H61 — H61 means indoor coil temperature sensor (T2) error - the indoor evaporator coil read
- EC07 — EC07 means the outdoor unit is not seeing outdoor fan speed in the range it expects (
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Safe checks with an external tool or supply
These pages list the check you can do from outside the unit, with an optional external tool or maintenance supply. None of them repair an internal fault.
- EC51 — EC51 means the outdoor control has an EEPROM parameter error - the outdoor board is not accepting stored confi…
- H00 — H00 (displayed by Carrier manuals as EH00) means the indoor control's EEPROM malfunctioned - the indoor board …
- H62 — H62 (displayed by Carrier manuals as EH62) means the T2B evaporator coil inlet temperature sensor circuit is o…
Related troubleshooting guides
Manufacturer manuals
- Carrier EC07 error code - SplitAtlas (Comfort 22, manual Table 4)
- Carrier EC54 error code - SplitAtlas (Comfort 22, manual Table 4)
- Carrier EC56 error code - SplitAtlas (Comfort 22, manual Table 4)
- SplitAtlas: Carrier 45MHHAQ High Wall Heat Pump Owner's Manual, Table 4 Error Codes (per-code reference)
- SplitAtlas: Carrier 45MHHAQ Owner's Manual Table 4 (EL01 indoor/outdoor communication)
- Senville official support: Error Code EL 01 - Indoor & Outdoor Unit Communication Error
- SplitAtlas: Carrier 45MHHAQ Owner's Manual Table 4 (FL09 platform mismatch)
- SplitAtlas: Carrier 45MHHAQ Owner's Manual Table 4 (EL16 adapter-board communication)
E codes
- Carrier EC07 error code
EC07 means the outdoor unit is not seeing outdoor fan speed the way it expects - the fan may be blocked, failing, or not driven correctly. Clear debri… - Carrier EC51 error code
EC51 means the outdoor control has an EEPROM parameter error - the outdoor board is not accepting stored configuration data correctly (Carrier 45MHHAQ… - Carrier EC52 error code
EC52 means an outdoor coil temperature sensor error - the outdoor unit is not getting a valid outdoor coil (T3) temperature reading it needs for heati… - Carrier EC53 error code
EC53 means an outdoor ambient temperature sensor error - the outdoor unit is not getting a valid outdoor air (T4) temperature reading, which affects c… - Carrier EC54 error code
EC54 means the outdoor unit cannot trust the compressor discharge temperature sensor reading, so it stops to protect the compressor. One safe power cy… - Carrier EC56 error code
EC56 means the indoor coil outlet temperature reading is not valid, so the system stops because it cannot confirm coil conditions. Power cycle once; s…
H codes
- Carrier H00 error code
H00 (displayed by Carrier manuals as EH00) means the indoor control's EEPROM malfunctioned - the indoor board is not reading stored control data corre… - Carrier H03 error code
H03 (displayed by Carrier manuals as EH03) means the indoor unit is not seeing indoor fan speed the way it expects - the system stops to protect the i… - Carrier H60 error code
H60 (shown as EH60 in Carrier's 45MHHAQ manual Table 4; many Midea-built displays drop the leading E) means the indoor unit is not getting a valid roo… - Carrier H61 error code
H61 (shown as EH61 in Carrier's 45MHHAQ manual Table 4; many Midea-built displays drop the leading E) means the indoor unit is not getting a valid ind… - Carrier H62 error code
H62 (displayed by Carrier manuals as EH62) means the T2B evaporator coil inlet temperature sensor circuit is open or shorted - the indoor unit cannot … - Carrier H65 error code
H65 (displayed by Carrier manuals as EH65) means the T2A evaporator coil inlet temperature sensor circuit is open or shorted - the indoor unit cannot … - Carrier H66 error code
H66 (displayed by Carrier manuals as EH66) sits in the same group as EH62: an evaporator coil inlet temperature sensor (T2B) open/short fault that the…
L codes
- Carrier L01 error code
L01 (displayed as EL01) means the indoor and outdoor units are not exchanging the expected control signal. Check wiring visually, power cycle once, an… - Carrier L09 error code
L09 (displayed as FL09) means Carrier's control is seeing a platform mismatch - equipment, board, or configuration do not match after installation or … - Carrier L16 error code
L16 (displayed as EL16) means the adapter board and the outdoor main board are not communicating - a board/wiring fault inside the outdoor unit. One s…