Viessmann Error Code LC03: Speed limited by current (Mini-Split)

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

Viessmann error code LC03 on a mini-split means: Speed limited by current. It is also called Viessmann diagnostic code LC03.

Low severityMini-SplitViessmann DLFSHB high wall indoor

Homeowner? What Viessmann code LC03 means for you

Usually minor Your ductless mini-split is reporting: Speed limited by current. 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 Viessmann error code LC03 mean?

Compressor frequency limited because of current.

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.

Viessmann models that use code LC03

DLFSHBH09XAK DLFSHBH12XAJ DLFSHBH12XAK DLFSHBH18XAK DLFSHBH24XAK

Other Viessmann Mini-Split codes

Code	Meaning
J4	Main board to IPM board communication error
J5	High pressure protection
J6	Low pressure protection
J8	AC voltage protection
LC01	Speed limited by condenser temperature
LC02	Speed limited by discharge temperature
LC05	Speed limited by voltage
LC06	IPM high temperature / PFC frequency limit
LH00	Speed limited by indoor coil temperature
LH07	Speed limited by remote
LL	Controls locked
nA	No fault

All Viessmann Mini-Split error codes →

Viessmann code LC03: homeowner questions

What does Viessmann code LC03 mean?

Speed limited by current. Compressor frequency limited because of current.

Is it safe to keep using my ductless mini-split with code LC03?

Usually yes. Code LC03 is normally minor, but if it keeps coming back have it checked.

Can I reset Viessmann code LC03 myself?

You can try one reset (power off for 30 seconds, then on). If Viessmann code LC03 comes back, the cause is still there and a licensed technician should check it.

Who can fix Viessmann code LC03 near me?

Aurora Star Tech Inc. repairs Viessmann 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 Viessmann · Mini-Split
Display shows a strange code or does not answer the remote - DLFSHB indoor Viessmann · Mini-Split
Multi-zone: one room heats, another will not cool - DLC multi-zone Viessmann · Mini-Split
Read live data with the outdoor check button (SW1) Viessmann · Mini-Split
Run the automatic wiring / piping correction Viessmann · Mini-Split

Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17. 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.