Who wouldn't be annoyed when it's hot outside but the car air conditioner is only blowing air? Normally, an air conditioner should be able to keep the cabin cool, even when it's scorching hot outside. If your car's AC starts feeling less cool, it could be due to issues with certain components. Let's explore the 15 most common reasons why a car's AC isn't cooling properly!

1. Low Refrigerant

Without refrigerant, the AC can't circulate cool air. If it's just blowing air, the refrigerant might be depleted. The solution is to have it refilled at an authorized service center or a nearby AC specialist.

2. Dirty Condenser

The condenser functions to release heat from the AC system. If it’s dirty, the heat release process is disrupted. The result? The AC only blows air. Make sure to clean this part regularly.

3. Damaged Compressor

If the condenser is clean but the AC still isn’t cooling, the compressor might be damaged. You can check this by looking at the sight glass, which will be black if the freon flow is disrupted.

4. Extra Fan Not Working

The extra fan in front of the condenser helps lower the temperature. If it’s not spinning, the temperature won’t drop. As a result, the cabin will remain hot.

5. AC Pressure Too High

Just topped up the compressor oil? Be careful not to overfill. Freon pressure can rise, causing the compressor to overheat, and ultimately the AC loses its ability to cool the cabin.

6. Clogged Evaporator

Dust and debris can get stuck in the evaporator. If airflow is blocked, AC circulation becomes disrupted. Ensure this component is cleaned regularly.

7. Broken Fan Belt

The fan belt connects the engine’s rotation to the compressor. If it breaks, the compressor won’t work, and the AC will only blow warm air.

8. Faulty Thermistor

A combination of “thermo” and “resistor.” Its job is to signal the compressor to stop working when the cabin temperature is appropriate. If it’s faulty, the compressor will keep running until the evaporator freezes, and the AC will no longer cool.

9. Clogged Drainage Channel

Condensation on the dashboard? It could be that the drainage channel from the AC condensation is blocked. This causes the AC to stop cooling and may result in an unpleasant odor from the damp carpet.

10. Excessive Compressor Oil

Excess oil reduces the space for refrigerant to circulate. If the refrigerant cannot circulate properly, the AC will not cool effectively.

11. Damaged Cables or Connectors

Electrical flow to the AC components can be disrupted if there are damaged cables or connectors. Ensure all electrical connections are secure and functioning properly.

12. Vehicle Electrical Issues

Issues with the overall electrical system, including the AC fuse and relay, can also cause the AC to fail to cool. Each electrical component needs to be checked individually.

13. Overheating Engine

An overheating engine can disrupt AC performance, especially because refrigerant pressure drops and the compressor loses power. Refrigerant can also leak if the engine temperature is unstable.

14. Magnetic Clutch Gap Too Wide

A faulty magnetic clutch can prevent the compressor from connecting properly to the engine. As a result, the cooling system does not function properly.

15. Dirty AC Filter

A dirty AC filter makes it difficult for air to flow out, even though its function is to filter the air before it enters the cabin. Clean or replace the filter regularly to keep the AC cool.

Indonesia 🇮🇩 

AC Mobil Nggak Dingin? Ini Beberapa Kemungkinan Penyebabnya

Siapa sih yang nggak kesal kalau lagi panas-panas di jalan tapi AC mobil malah cuma ngeluarin angin doang? Padahal, AC yang normal seharusnya bisa bikin kabin tetap adem, meski cuaca di luar lagi terik-teriknya. Kalau AC mobilmu mulai terasa nggak dingin, bisa jadi ada beberapa komponen yang bermasalah. Yuk, kenali 15 penyebab paling umum kenapa AC mobil nggak dingin!

1. Freon Habis

Tanpa freon, AC nggak bisa menyebarkan udara dingin. Kalau cuma keluar angin, bisa jadi freonnya sudah habis. Solusinya, tinggal isi ulang di bengkel resmi atau ke spesialis AC terdekat.

2. Kondensor Kotor

Kondensor berfungsi buang panas dari sistem AC. Kalau kotor, proses pembuangan panas jadi terganggu. Akibatnya? AC cuma mengeluarkan angin saja. Rajin-rajinlah bersihkan bagian ini.

3. Kompresor Rusak

Kalau kondensor sudah bersih tapi AC tetap nggak dingin, bisa jadi kompresornya rusak. Tandanya bisa dicek dari sight glass yang menghitam, yang artinya aliran freon terganggu.

4. Extra Fan Mati

Kipas tambahan di depan kondensor bantu turunkan suhu. Kalau nggak berputar, suhu nggak turun-turun. Ujungnya, kabin tetap panas.

5. Tekanan AC Terlalu Tinggi

Baru isi oli kompresor? Hati-hati kebanyakan. Tekanan freon bisa naik, bikin kompresor jadi panas, dan akhirnya AC kehilangan kemampuan mendinginkan kabin.

6. Evaporator Tersumbat

Debu dan kotoran bisa nyangkut di evaporator. Kalau aliran udara terhambat, sirkulasi AC pun jadi kacau. Pastikan komponen ini dibersihkan rutin.

7. Fan Belt Putus

Fan belt fungsinya menyambungkan putaran mesin ke kompresor. Kalau putus, kompresor nggak bekerja, dan AC pun cuma menyemburkan angin hangat.

8. Thermistor Rusak

Kependekan dari thermo dan resistor. Tugasnya kasih sinyal ke kompresor buat berhenti kerja saat suhu kabin sudah sesuai. Kalau rusak, kompresor kerja terus sampai evaporator beku, dan hasilnya AC jadi nggak dingin lagi.

9. Saluran Buangan Air Tersumbat

Muncul embun di dasbor? Bisa jadi saluran buangan air dari kondensasi AC mampet. Efeknya, AC nggak dingin dan bisa timbul bau nggak sedap dari karpet yang lembab.

10. Oli Kompresor Berlebih

Kebanyakan oli bikin ruang buat freon menyempit. Kalau freon nggak bisa bersirkulasi dengan baik, AC jadi kurang maksimal mendinginkan.

11. Kabel atau Konektor Rusak

Aliran listrik ke komponen AC bisa terganggu kalau ada kabel atau konektor yang rusak. Jadi pastikan semua sambungan listrik aman dan berfungsi.

12. Masalah Kelistrikan Mobil

Masalah di sistem kelistrikan secara keseluruhan, termasuk fuse dan relay AC, juga bisa bikin AC gagal dingin. Perlu dicek satu-satu komponen listriknya.

13. Mesin Overheat

Mesin yang terlalu panas bisa mengganggu kinerja AC, terutama karena tekanan freon turun dan kompresor kehilangan tenaga. Freon juga bisa bocor kalau suhu mesin nggak stabil.

14. Celah Kopling Magnet Terlalu Jauh

Kopling magnet yang bermasalah bisa bikin kompresor nggak nyambung sempurna ke mesin. Alhasil, sistem pendingin pun nggak berjalan baik.

15. Filter AC Kotor

Filter AC yang kotor bikin udara susah keluar, padahal fungsinya menyaring udara sebelum masuk kabin. Bersihkan atau ganti filter secara rutin biar AC tetap adem.