Why does the displayed temperature decrease but the fan does not work and the air does not cool?

Question

Accepted Answer

This symptom describes a common problem: the display normally goes down but cooling is not active. Here are the points to check in order:

1. Wait 3 minutes after starting

The air conditioner Fuave ACB09W24A has a compressor protection that causes an automatic shutdown after 3 minutes at startup. This is a normal safety mechanism. The fan will restart afterwards. Always wait at least 3 minutes before concluding that it is not working.

2. Check the hot air exhaust hose

The exhaust hose (Ø 10 cm, length 1.5 m) must be:

Completely unrolled and without folds or sharp bends
Directed outside (window or door)
With the window sealing kit properly installed

A bent or obstructed hose prevents hot air from escaping, which stops cooling and the fan.

3. Check the set temperature

It must be lower than the current room temperature. For example, if the room is 28°C, set the air conditioner to 24°C (the range is 15-31°C). If you set 30°C in a room at 28°C, cooling will not activate.

4. Check the air filter

A clogged filter severely reduces efficiency. Clean it regularly:

Weekly gentle vacuuming
If very clogged: wash with lukewarm water (never hot)

5. Check the plug and power supply

Make sure that:

The cable (1.8 m) is completely unrolled and well plugged in
The socket delivers 220-240V ~ 50Hz
No unstable extension or shared socket

6. Check the remote control (if used)

The AAA batteries may be depleted. Change the 2 batteries and test again.

7. Configuration checks

Make sure that:

You are in Cooling mode (not Ventilation or Dehumidification)
The child safety mode is not activated (hold for 3 sec on the mode button)
The room is not less than 15 m³ in volume
Windows and doors are properly closed

If after all these checks the fan does not restart and the air still does not cool, check the LCD screen for an error code (notably E4 which indicates a water drainage problem). A persistent shutdown may indicate a malfunction of the compressor requiring professional intervention.

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