If your aircon isn’t cooling properly or turns on and off at random, the issue might not be the motor or the compressor —
it could be a faulty sensor.
At first, it may be hard to notice, but a bad sensor can affect your aircon’s temperature control, energy usage, and overall comfort.
In this article, we’ll explain what the aircon sensor does, how to spot issues early, and what to do if it fails.
What Does an Aircon Sensor Do?
First of all, the aircon sensor (also called a thermostat sensor) measures the room temperature and tells your unit when to cool or stop.
In other words, it helps the system maintain your desired temperature.
When the sensor isn’t working correctly, your aircon gets confused — and so does your comfort level.
Signs of Aircon Sensor Problems
So, how can you tell if your aircon sensor is faulty?
Here are some common signs to watch for:
Inconsistent Room Temperature
Firstly, if your room feels too hot or too cold even after adjusting the settings, the sensor might not be reading the temperature correctly.
Aircon Turns On and Off Repeatedly
Next, a faulty sensor may cause your aircon to cycle on and off more often than usual.
This is called short cycling, and it can increase wear and tear on your unit.
Unresponsive Temperature Settings
Another sign is when changing the temperature on your remote has little or no effect.
If your aircon ignores your settings, the sensor might not be detecting the current temperature at all.
Error Code on Display
In addition, some newer aircon models will show an error code when the sensor isn’t working.
Check your manual or contact a professional if you see a code you don’t recognise.
What Causes Sensor Problems?
Aircon sensors can fail due to:
Dust or dirt buildup
Loose or disconnected wires
Age and wear over time
Improper sensor position near the cooling coil
Fortunately, most of these issues can be fixed with regular maintenance or a quick repair.
What Should You Do?
In conclusion, if you suspect your aircon has a sensor problem, it’s best to have it inspected by a professional.
Trying to fix it yourself can cause more damage, especially if you’re not sure where the sensor is located.
At Lion City Air Conditioner Services PTE LTD, we offer expert diagnostics and sensor repair for all major aircon brands in Singapore.
We’ll get your system back to cooling accurately and efficiently.
📞 Call us today at +65 8818 5781
🌐 Book online at lioncityaircon.sg
