Best Air Conditioner Repair Tips for Summer 2025
In the scorching summer heat, the air conditioner becomes a lifesaver. But when you're sweating profusely and turn on the AC, only to find the air isn't cool enough, or even feels completely chilly, isn't your heart instantly shattered? Don't rush to call a repairman! In fact, 80% of AC malfunctions aren't serious problems and can be easily fixed yourself.
In the scorching summer heat, the air conditioner becomes a lifesaver. But when you're sweating profusely and turn on the AC, only to find the air isn't cool enough, or even feels completely chilly, isn't your heart instantly shattered? Don't rush to call a repairman! In fact, 80% of AC malfunctions aren't serious problems and can be easily fixed yourself.
AC Won't Turn On
There are two main reasons why it won't turn on. The first is when it doesn't respond at all when powered on. Important voltage measurements (such as the transformer, fuse, and rectifier bridge) indicate that the 5V voltage is normal. In most cases, replacing the crystal oscillator (located next to the CPU) can resolve this issue.
Another common problem is when there's a buzzing sound when plugged in, and the remote control won't turn on (though the manual control works). This usually means the receiver is broken.
Cleaning the Filter
An air conditioner's filter is like your nose: over time, it accumulates dust, hair, and even mold. If it's clogged, the cool air can't escape, significantly reducing the cooling effect.
How to fix it?
- Remove the filter: Turn off the air conditioner, gently open the panel, and pull out the filter (it usually snaps open with a push).
- Rinse with clean water: Use the shower head to flush away dust (do not scrub with a brush to prevent the mesh from deforming).
- Dry and reinstall: Let it air dry in a cool place, avoiding direct sunlight (plastic mesh can easily deform under high temperatures).
Tip: Clean it monthly, or every two weeks during frequent use in the summer.
Cleaning the outdoor unit's heat sink
If the air conditioner's heat sink is clogged with dust or catkins, it's like running in a cotton jacket. Heat dissipation is difficult, and cooling efficiency is reduced by half!
How to do it?
- Power off for safety: Always unplug the air conditioner!
- Gently brush with a soft brush: Use an old toothbrush or a special soft-bristle brush to gently brush along the gaps between the heat sinks to remove dust.
- Spray with a cleaning agent: Purchase air conditioner cleaning agent online, spray it on the heat sink and coils, and let it sit for 10 minutes. 4. Drain water: Reconnect the power and run the unit in cooling mode for 15 minutes. The dirty water will automatically drain out.
Key Details: Touch the metal sheet on the side of the external unit. If it's hot, the heat sink is clogged. Clean it immediately!