Do not look for a boiler-style holiday mode on a typical split. Many remotes have a timer, a sleep function or a temperature limit, and none of those is frost protection for an empty house. Leaving cooling running while you are away spends money and can leak condensate with nobody to notice, especially if a pump is involved. Prefer off, or a modest setpoint only with a reason and a neighbour who will look. Read the manual for the model you own before you trust an icon.
Icons that are not a boiler holiday mode
Boiler holiday modes hold a low heating temperature so pipes do not freeze. A wall split is not that device. Icons labelled holiday, away or eco are brand-specific and sometimes only raise the cooling setpoint a little, or set a schedule. They do not watch the house. If the booklet does not describe an absence function in plain words, you do not have one. If the house is empty for weeks at a time, ask whether the model has a real absence function or only a timer, and whether a condensate pump is part of the job.
A timer that switches off after eight hours is useful for a bedroom on a normal night. It is a poor plan for a fortnight, because it needs setting and it still runs until it ends. Read the page for your model, not a different brand. Off is the usual choice for an empty fortnight.
Empty-house cooling, pumps and a neighbour
The unit still delivers its kilowatts, and a low setpoint makes it work harder, not cleverer. At 16C in an empty room it may ice the coil and overflow the drain. Nobody is there to see the stain. A sensible setpoint, if you truly need the place held for plants or a pet sitter's instructions, should be one you would accept with the doors shut and the windows closed. Heating an empty house with a reverse-cycle unit has the same gap: defrost water and a pump can misbehave on a cold night. Energy Saving Trust describes the heating behaviour. It does not provide a holiday setting. If freeze protection matters, that is a building and plumbing question, not a leaf icon.
Gravity drains fail quietly too, but a condensate pump fails with a full tray. Some units then stop on a float switch. Some do not, or the alarm is a beep in an empty hall. Ask a neighbour to glance in if you insist on running. Show them the isolator in case the outdoor casing is damaged while you are away. Do not ask them to hose the unit. Pets in the house change the decision, and they need a person anyway. Do not leave cooling as a substitute for someone checking bowls and windows. The first week after you return is a good time to look at the drain before you decide the experiment worked. If the function exists, have it shown at handover, and have the isolator marked.
Frequently asked questions
Does a split have holiday mode like my boiler?
Usually no. You may have a timer or a mild setpoint shift. Read the manual for your model. Treat off as the default while the house is empty.
Will eco mode look after the house for a fortnight?
Eco still runs the unit. It is not a caretaker and it will not spot a blocked drain. Prefer off unless a person is checking.
Should I leave it on for the house plants?
Only if you accept the running cost and a neighbour can look for water. A modest setpoint beats 16C. Many plants do not need the room held that cold.
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How this guide was prepared
This guide was written by the Local AC Installers Editorial Team. We compare official guidance, legislation and established consumer information, separate general information from project-specific advice, and show publication dates and sources. We do not accept installer accreditation claims at face value.