Cosmo / Cosmo Series
Cosmo E5 error code
E5 means the unit has detected current draw outside the allowed range. TOSOT Direct connects this code with power stability and blocked indoor or outdoor airflow.
- Urgency
- advisory
- Verified
- Jul 31, 2026
- Fix path
- Technician
What it means
E5 means the unit has detected current draw outside the allowed range. TOSOT Direct connects this code with power stability and blocked indoor or outdoor airflow.
Urgency
advisory
Use only safe airflow checks. If E5 returns, electrical and compressor checks belong to a technician.
Likely causes
- Unstable supply voltage
- Blocked air inlet or outlet
- Dirty filter or coil increasing load
- Electrical component drawing too much current
Homeowner fix
Clean the filter and make sure the indoor and outdoor air paths are clear. Do not open electrical covers, test live voltage, or keep resetting a breaker.
When to call a pro
Call a licensed HVAC technician if E5 returns after airflow is clear, if a breaker trips, or if the outdoor unit struggles to start.
This code points to compressor and electrical or inverter work - get repair quotes from contractors in your area.
Get repair quotesRepair vs replace
Simple airflow causes are repairable. Electrical, inverter, or compressor causes should be priced against the age and warranty status of the 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 airflow and coils, measure supply voltage and current draw, verify compressor/fan loads, and diagnose inverter or control-board current sensing. 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 E and five 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 E5 means the same thing on either badge and the steps above apply.
Open TOSOT E5Related 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