Cosmo / Cosmo Series
Cosmo H6 error code
H6 means the indoor unit does not see expected fan motor feedback. TOSOT Direct describes it as the internal fan motor not operating or no feedback from the indoor fan motor.
- Urgency
- advisory
- Verified
- Jul 31, 2026
- Fix path
- Technician
What it means
H6 means the indoor unit does not see expected fan motor feedback. TOSOT Direct describes it as the internal fan motor not operating or no feedback from the indoor fan motor.
Urgency
advisory
Turn the unit off if the fan is stopped, scraping, or blowing very little air. Fan motor and wiring work is professional-only.
Likely causes
- Blocked indoor fan wheel or blade
- Debris or buildup restricting fan rotation
- Loose indoor fan motor wiring
- Indoor fan motor or control fault
Homeowner fix
Turn the system off and check only the filter and visible air outlet for obvious blockage. Do not insert tools into the blower or remove covers.
When to call a pro
Call a licensed HVAC technician if H6 returns, the indoor fan does not run, or there is scraping, burning smell, or repeated shutdown.
This code points to electrical or inverter work - get repair quotes from contractors in your area.
Get repair quotesRepair vs replace
Indoor fan motor faults are usually repairable. Compare repair with replacement only when paired with board failure on an older system.
See Cosmo mini-splitsYour Cosmo model
Cosmo Series model pages in the Cosmo catalog help compare this repair path with current replacement options.
- Cosmo Series 9,100 BTU R-32 115V (GWH09AWCXB-A6DN***/I / GWH09ATCXB-A6DNA1C/O)
Cosmo Series
- Cosmo Series 9,100 BTU R-32 208/230V (GWH09AWCXB-D6DN***/I / GWH09ATCXB-D6DNA1C/O)
Cosmo Series
- Cosmo Series 12,000 BTU R-32 115V (GWH12AWCXB-A6DN***/I / GWH12ATCXB-A6DNA1A/O)
Cosmo Series
- Cosmo Series 12,000 BTU R-32 208/230V (GWH12AWCXB-D6DN***/I / GWH12ATCXB-D6DNA1A/O)
Cosmo Series
For your technician
Technician note: inspect blower obstruction, motor harness, fan motor feedback, indoor PCB drive/output, and rotate-test only with power safely isolated. Page context: Cosmo maps this display to the Cosmo Series line; source: TOSOT Direct Cosmo Series product-document manual links plus TOSOT Direct mini-split error-code guide and FAQ; display convention: match the letter H and six marker exactly before comparing neighboring codes.
Which systems show it
Cosmo Series
Sold under more than one brand
Shared with TOSOT. Cosmo and TOSOT document this code from the same manufacturer source, so H6 means the same thing on either badge and the steps above apply.
Open TOSOT H6Related troubleshooting
Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.
Related codes
Source
- Document
- TOSOT Direct Cosmo Series product-document manual links plus TOSOT Direct mini-split error-code guide and FAQ