Carrier mini split code CL
Filter cleaning reminder. Also shown as CF, FC.
- TypeStatus, not a fault
- SystemDisplay
- Can I fix it?Usually a homeowner fix
- Applies toindoor display, classic two-character codes (38MHRB, 38MGR, 40MAQ)
What CL means on a Carrier
A run-hour timer has expired and the unit is reminding you to clean the filters. Nothing is wrong; the unit keeps running.
On this platform, CL is a status, not a fault: the unit is telling you what it is doing; nothing is wrong.
What to do
You can almost always clear this yourself with the steps below.
- Wash the mesh filters behind the front panel, let them dry, and reinstall.
- Clear the reminder using the remote: on most models press and hold the LED or Reset button (see your manual), or turn the unit off and back on with the remote.
When to call a technician
This is not a fault. No technician is needed unless it will not clear.
Which Carrier units show CL
This page applies to Carrier Comfort 38MHRB / 40MHHQ, Comfort 38MGR / 40MGQ, Performance 40MAQ / 38MAQ, Infinity 40MPHA / 38MPRA and Carrier multi-zone units on the indoor display, classic two-character codes (38MHRB, 38MGR, 40MAQ). Carrier's own documentation lists CL as "Filter cleaning reminder", the same definition used across the Midea platform (classic codes) it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.
Where Carrier shows this code
indoor display, classic two-character codes (38MHRB, 38MGR, 40MAQ): The code appears on the indoor unit's LED display in place of the set temperature. Some models also blink the indicator lamps in a pattern that matches the code. E codes are faults in the indoor unit or its communication link, F codes are faults on the outdoor side, and P codes are protections: the outdoor unit has stopped itself to prevent damage. EC is the refrigerant leak check.
Other Carrier codes
Same part of the system as CL:
CL on other brands
The same characters do not always mean the same thing. Check the brand on your unit.
- Pioneer CL Filter cleaning reminder
- LG CL Child lock active
Questions people ask
Is CL on a Carrier mini split an error?
No. CL is a status message: filter cleaning reminder. A run-hour timer has expired and the unit is reminding you to clean the filters.
Do I need a technician for Carrier CL?
You can almost always clear this yourself with the steps below. This is not a fault. No technician is needed unless it will not clear.
Sources
- Carrier 38MHRB Single Zone Ductless Service Manual SG-38MHRB-01 (Diagnosis and Solution section)
- Carrier 40MAQ / 38MAQ High-Wall Ductless Service Manual 40MAQ-01SM (Diagnosis and Solution section)
- Carrier 40MPHA / 38MPRA Infinity High Wall Ductless Service Manual (error code table)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.