Electrical problems are common in air conditioning units, especially those caused by poor contact. This type of failure can compromise the operation of the equipment, increase energy consumption and even cause risks of short circuits. See below how to identify signs of bad contact and what to do:
1. Device Turns On and Off by Itself
One of the most frequent signs of bad contact is the air conditioner turning on and off for no apparent reason. This can occur due to faults in the internal electrical connections or in the socket.
2. Panel or Control with Intermittent Failures
If the digital display flashes, turns off or responds erratically, there may be a bad contact in the electronic board or in the power cable. Sometimes, the remote control also fails due to electrical interference.
3. Strange Noises When Turning On
Popping, buzzing or unusual noises when turning on the air conditioner may indicate sparks caused by bad contact in the electrical terminals, relays or connectors.
4. Burning Smell or Overheating
In more serious cases, poor contact causes excessive heating in the wires. This can release a burning smell, melt insulation or even turn off the circuit breaker for safety reasons.
5. Performance Drop or Refrigeration Failures
Even if the appliance is turned on, poor contact can prevent the compressor, fan or sensors from working properly, resulting in inefficient cooling.
6. Outlet or Plug Heating
When touching the outlet or plug, if you notice a temperature above normal, this is a sign of a loose connection or overload — which constitutes poor contact and requires immediate attention.
How to Confirm the Problem?
Visual inspection: check for loose wires, melted insulation or oxidation on the terminals.
Test with a multimeter: a professional can measure the continuity and voltage of the electrical points.
Checking the board: electronic boards damaged by poor contact usually have burnt tracks or darkened components.
What to Do in Case of Poor Contact?
Unplug the appliance immediately.
Do not attempt to repair it yourself if you do not have electrical experience.
Call a qualified technician to reconnect the connections, tighten the terminals or replace damaged parts.
Always use sockets and cables that are suitable for the power of the appliance.
Conclusion
Poor contact is a serious and silent problem. At the slightest sign of instability in the operation of the air conditioner, investigate or seek a technician. A simple fix can prevent major accidents and increase the lifespan of the appliance.
