Samsung mini split error code E484
PFC overload.
- TypeProtection
- SystemPower supply
- Can I fix it?Technician job
What E484 means on a Samsung
The power-factor-correction stage exceeded its limit.
On this platform, E484 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- Low or unstable supply voltage.
- A failed PFC circuit.
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 a board replacement.
Which Samsung units show E484
This page applies to Samsung Wind-Free, Quantum, Max Heat and Free Joint Multi units. Samsung's own documentation lists E484 as "PFC overload", the same definition used across the Samsung 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 Samsung shows this code
The indoor display shows E followed by three digits (E101, E554). Units without a full display blink the indicator lamps in a pattern the manual decodes; the outdoor board's 7-segment display or LEDs show the same code. E1xx codes are indoor-unit faults, E2xx are communication faults, E4xx are outdoor sensors, protections and inverter faults, and E5xx are outdoor board and refrigerant faults.
Other Samsung codes
Same part of the system as E484:
Questions people ask
Can I reset a Samsung E484 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If E484 comes back, the fault is real and needs the checks above.
Is it safe to keep running a Samsung showing E484?
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 E484?
Usually a board replacement. Ask for the measurements, not just a parts quote.
Sources
- Samsung residential split service manuals (error code tables)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.