8 °C / 10 °C frost-guard heating
A low-temperature heating setting that keeps an empty room from freezing, holding it around 8–10 °C (46–50 °F).
What pressing it does
For holiday homes, garages and rooms left empty in winter. Gree holds 8 °C (46 °F) and fixes the fan and temperature; Fujitsu’s MIN. HEAT holds 10 °C (50 °F) and lights the ECONOMY lamp; Panasonic’s RFP runs heat at high fan to monitor the room and cycles the compressor at a 46 or 50 °F setting.
What it does not do
It does not protect anything if the unit loses power: Panasonic says the mode will not function during a power failure, and it is not meant as a comfort setting.
Makes differ, check your unit’s manual: the same drawing can mean different things on different brands, and only your model’s manual says exactly what a button does and which modes it works in.
- What it looks like
- 8 °C, 10 °C or 46 °F on the remote, a button labelled MIN. HEAT or RFP, or a house with a snowflake.
- Names makers use
- 46°F (8°C) heating / Vacation mode (Gree); MIN. HEAT 10 °C (Fujitsu); Room Freeze Protection RFP (Panasonic)
Where makers differ
8 °C on Gree, 10 °C on Fujitsu, 46 or 50 °F on Panasonic; Gree turns it on with a button combination (TEMP and CLOCK in heat mode), the others with their own button.
Other symbols with the same shapes
Sources
No single published standard defines air-conditioner remote icons, so this meaning is taken from 3 makers’ own manuals, each fetched and read on the date shown:
- Gree: Gree Comfort — Vireo GEN3 indoor unit owner’s manual (PDF) — Vacation mode (freeze guard): “set’s the unit to 46°F (8°C) in heating to keep the temperature in the space above freezing”; press TEMP and CLOCK together in HEAT mode; fan speed and temperature cannot be adjusted. Checked 2026-09-26.
- Fujitsu General: Fujitsu General — Operating manual, wall-mounted 18/24RLB and 30/36RLXB (US, PDF) — “MIN. (MINIMUM) HEAT button — Starts MIN. HEAT operation that maintains the room temperature at 50 °F (10 °C) so as to prevent the room temperature to drop too low … the ECONOMY indicator (green) turns on.” Checked 2026-09-26.
- Panasonic: Panasonic — Operating instructions, CS-Z*AKUAW air conditioner (North America, PDF) — Room Freeze Protection (RFP), 46 °F or 50 °F: heat mode at high fan speed, compressor cycles around the setting; “In the advent of a power failure this mode will not function.” Checked 2026-09-26.
Written in our own words; quotations are the makers’ wording.