Midea Error Code EC51: Outdoor EEPROM error (Heat Pump)

Updated October 13, 2026 · by Aurora Star Tech Inc.

Midea error code EC51 on a heat pump means: Outdoor EEPROM error. It is also called Midea diagnostic code EC51.

High severityHeat PumpMidea DLCURA ducted single-zone inverter heat pump (outdoor)

Homeowner? What Midea code EC51 means for you

Call a technician Your heat pump is reporting: Outdoor EEPROM error. The heat pump has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.

Safe things you can check yourself

Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Midea error code EC51 mean?

The outdoor main board's memory chip (EEPROM) has a read/write fault.

Applies to: DLCURAH18-60 AAK/ABK single-zone heat pump outdoor units (18K-60K, regular and High Heat)

Common causes of Midea code EC51

Outdoor main board fault
Power disturbance corrupting board data

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Midea models that use code EC51

DLCURAH18AAK DLCURAH18ABK DLCURAH24AAK DLCURAH24ABK DLCURAH30AAK DLCURAH30ABK DLCURAH36AAK DLCURAH36ABK DLCURAH48AAK DLCURAH48ABK DLCURAH60AAK DLCURAH60ABK

Other Midea Heat Pump codes

Code	Meaning
EC07	Outdoor DC fan motor fault / speed out of control
EC5C	High pressure sensor failure
EC50	outdoor temperature sensor fault
EC52	condenser coil temperature sensor fault
EC53	outdoor ambient temperature sensor fault
EC54	Discharge temperature sensor (TP) open/short
EC57	refrigerant pipe temperature sensor fault
EC71	Outdoor DC fan motor over-current
EC72	Outdoor DC fan motor lack-phase
EL01	Indoor/outdoor communication error
EL16	Main board to transit board communication error
LC06	Inverter module (IPM) high temperature protection

All Midea Heat Pump error codes →

Midea code EC51: homeowner questions

What does Midea code EC51 mean?

Outdoor EEPROM error. The outdoor main board's memory chip (EEPROM) has a read/write fault.

Is it safe to keep using my heat pump with code EC51?

It depends on the cause. The heat pump has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.

Can I reset Midea code EC51 myself?

You can try one reset (power off for 30 seconds, then on). If Midea code EC51 comes back, the cause is still there and a licensed technician should check it.

Who can fix Midea code EC51 near me?

Aurora Star Tech Inc. repairs Midea heat pumps in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

Source: Midea/Carrier DLCURA Installation Instructions (Catalog DLCURA-03SI), Table 11 Outdoor Unit Diagnostic Codes, p.19. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.