Midea Error Code d3: Demand response signal DR3 received (Mini-Split)

Updated October 16, 2026 · by Aurora Star Tech Inc.

Midea error code d3 on a mini-split means: Demand response signal DR3 received. It is also called Midea diagnostic code d3.

Low severityMini-SplitMidea DLFSHBH wall indoor (DLCM multi-zone)

Homeowner? What Midea code d3 means for you

Usually minor Your ductless mini-split is reporting: Demand response signal DR3 received. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.

Safe things you can check yourself

Check the remote: fresh batteries and the right mode (Cool, Heat or Auto).
Check the breaker and the outdoor disconnect; both should be ON.
Open the front cover of the indoor unit and rinse the washable filters if they are dusty; let them dry before putting them back.
Keep the outdoor unit clear of snow, ice and leaves.
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 d3 mean?

The unit received a DR3 demand response signal.

Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units

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 d3

DLFSHBH09XAK DLFSHBH12XAJ DLFSHBH12XAK DLFSHBH18XAK DLFSHBH24XAK

Other Midea Mini-Split codes

Code	Meaning
--	Indoor units mode conflict
AP	Wi-Fi pairing (AP mode)
CL	Filter cleaning reminder / Active Clean
CP	Remote switched off
d1	Demand response signal DR1 received
d2	Demand response signal DR2 received
dE	Demand response input error
dF	Defrost
E-C-O	ECO mode
E1	Indoor / outdoor communication error
EC07	Outdoor fan speed out of range
EC50	Outdoor temperature sensor fault

All Midea Mini-Split error codes →

Midea code d3: homeowner questions

What does Midea code d3 mean?

Demand response signal DR3 received. The unit received a DR3 demand response signal.

Is it safe to keep using my ductless mini-split with code d3?

Usually yes. Code d3 is normally minor, but if it keeps coming back have it checked.

Can I reset Midea code d3 myself?

You can try one reset (power off for 30 seconds, then on). If Midea code d3 comes back, the cause is still there and a licensed technician should check it.

Who can fix Midea code d3 near me?

Aurora Star Tech Inc. repairs Midea ductless mini-splits 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

Troubleshooting guides

Indoor unit leaking water All brands · Mini-Split
Poor capacity / high head All brands · Mini-Split
Water leaking All brands · Mini-Split
Discharge the inverter capacitors before service Midea · Mini-Split
Display shows a strange code or does not answer the remote - DLFSHB indoor Midea · Mini-Split
Multi-zone: one room heats, another will not cool - DLC multi-zone Midea · Mini-Split
Read live data with the outdoor check button (SW1) Midea · Mini-Split
Run the automatic wiring / piping correction Midea · Mini-Split

Source: Midea DLFSHBH09XAK indoor display table (photo, 2026-10-16); Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Display Function p.12. 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.