Hisense mini split error code 20
Outdoor fan motor locked rotor.
- TypeFault
- SystemFan motor
- Can I fix it?Homeowner checks, then maybe a tech
What 20 means on a Hisense
The outdoor fan is stalled or not reporting rotation. The compressor stops because it cannot reject heat.
On this platform, 20 is a fault: something has failed or is disconnected and needs diagnosis.
Common causes
- A loose fan motor connector.
- Something blocking the fan.
- A failed fan motor.
- A failed outdoor control board.
How to fix it yourself
Work through the checks below first; they resolve most cases. If they do not, the repair itself may need a technician.
- Reset the system: switch the breaker (or the outdoor disconnect) off, wait a full five minutes so the boards fully discharge, then switch it back on and restart from the remote.
- Look at the outdoor unit: clear leaves, cottonwood fluff, snow or ice from the coil and make sure the fan can spin freely and nothing is stacked against the cabinet.
- With power off, spin the fan by hand; it should turn freely.
- Reseat the fan motor connector.
Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.
When to call a technician
Fan motor replacement if it spins freely but the code persists.
Which Hisense units show 20
This page applies to Hisense Hisense inverter single-zone and Hisense multi-zone units. Hisense's own documentation lists 20 as "Outdoor fan motor locked rotor", the same definition used across the Hisense 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 Hisense shows this code
Hisense inverter splits store the fault as a number. When the compressor has stopped on a fault, point the remote at the unit and press the SLEEP button 10 times within 10 seconds: the indoor display then shows the code (a second stored fault shows after four more presses). The Sleep, Timer and Running lamps also blink a pattern that matches the code. Newer models show the number on the display without the button sequence. Codes 1 to 21 are outdoor-unit faults and protections; 33 to 41 are indoor-unit faults. 0 means no fault is stored.
Other Hisense codes
Same part of the system as 20:
20 on other brands
The same characters do not always mean the same thing. Check the brand on your unit.
- Haier 20 Indoor thermal overload (heating)
Questions people ask
Can I reset a Hisense 20 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If 20 comes back, the fault is real and needs the checks above.
Is it safe to keep running a Hisense showing 20?
The unit will usually refuse to run, or run with reduced output, until the fault is cleared. Repeated resets do not fix anything and can mask a problem that is getting worse.
Do I need a technician for Hisense 20?
Work through the checks below first; they resolve most cases. If they do not, the repair itself may need a technician. Fan motor replacement if it spins freely but the code persists.
Sources
- Hisense split-type air conditioner service manual, section 7-1 Error Code Table (North America inverter models)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.