Carrier Error Code P0: Inverter module (IPM) fault (Mini-Split)

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

Carrier error code P0 on a mini-split means: Inverter module (IPM) fault. It is also called Carrier diagnostic code P0.

Critical severityMini-SplitCarrier DLCM(R/H)B multi-zone outdoor

Homeowner? What Carrier code P0 means for you

Stop and call Your ductless mini-split is reporting: Inverter module (IPM) fault. This code is a safety shutdown. Turn the ductless mini-split off and call a licensed technician. Do not keep resetting it. If you smell gas, leave the house and call your gas utility or 911 from outside.

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.

Call (647) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Carrier error code P0 mean?

Same fault as PC00. Shown on the 48K high heat model.

Applies to: DLCMHBH48EAK (48K high heat) only

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.

Carrier models that use code P0

DLCMHBH24CAK DLCMHBH30DAK DLCMHBH36DAK DLCMHBH48EAK DLCMRBH18BAK DLCMRBH36DAK DLCMRBH48EAK

Other Carrier Mini-Split codes

Code	Meaning
ODU P5	Condenser high temperature (outdoor board)
ODU P6	Inverter module (IPM) fault (outdoor board)
ODU PH	Compressor pre-heat
ODU RO	Oil return cycle
Off	Timer off
On	Timer on
P1	Over or under voltage protection
P2	Compressor top overheat (OLP)
P3	Low outdoor temperature cut-off in heating
P4	Compressor drive fault
P7	IPM temperature sensor fault
PC0A	Condenser high temperature protection

All Carrier Mini-Split error codes →

Carrier code P0: homeowner questions

What does Carrier code P0 mean?

Inverter module (IPM) fault. Same fault as PC00. Shown on the 48K high heat model.

Is it safe to keep using my ductless mini-split with code P0?

No. Code P0 is a safety shutdown, so keep the ductless mini-split off until a licensed technician has checked it.

Can I reset Carrier code P0 myself?

Do not keep resetting it. Repeated resets can hide a safety problem; a licensed technician needs to find the cause.

Who can fix Carrier code P0 near me?

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

Source: DLCMRBH/DLCMHBH Multi-Zone Outdoor Service Manual (sold as Midea, Carrier and Viessmann Vitocal 200-S; Viessmann doc 6225551-03, 12/2024), Table 24 Outdoor Unit Error Display (48 High Heat only) p.27; diagnosis p.68. 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.