Tosot mini split error code HC
PFC (power factor correction) protection. Also shown as Hc.
- TypeProtection
- SystemPower supply
- Can I fix it?Technician job
What HC means on a Tosot
The power-factor-correction stage on the outdoor board reported a fault.
On this platform, HC is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- Unstable supply voltage or a surge.
- A failed PFC circuit or board.
How to fix it yourself
Do the reset and the visual checks, but the underlying repair needs a technician with a meter and the service manual.
- 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.
- If you own a multimeter and are comfortable using it, measure the supply voltage at the outdoor unit's L1 and L2 terminals with the unit running. A 230 V system should read roughly 208 to 253 VAC.
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
Usually an outdoor board replacement by a technician.
Which Tosot units show HC
This page applies to Tosot Tosot single-zone and Tosot multi-zone units. Tosot's own documentation lists HC as "PFC (power factor correction) protection", the same definition used across the Gree platform 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 Tosot shows this code
The code shows on the indoor unit's display in place of the temperature. If the display is off, press the Light button on the remote. Some models also count out the code as indicator blinks. E codes are system protections and faults, F codes are mostly sensor faults, H codes are outdoor and compressor protections, U codes are motor and valve faults, and P codes are power-supply faults.
Other Tosot codes
Same part of the system as HC:
HC on other brands
The same characters do not always mean the same thing. Check the brand on your unit.
- Blueridge HC PFC (power factor correction) protection
Questions people ask
Can I reset a Tosot HC code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If HC comes back, the fault is real and needs the checks above.
Is it safe to keep running a Tosot showing HC?
Not repeatedly. A protection code means the unit stopped itself to prevent damage, and resetting it over and over can turn a cheap repair into a compressor failure. Reset once, check the basics, and stop if it returns.
What will a technician check for HC?
Usually an outdoor board replacement by a technician. Ask for the measurements, not just a parts quote.
Sources
- Tosot owner's manual (error code table)
- Gree residential split service manuals
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.