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What causes the intermittent cooling of the Kia KX5 air conditioner?

2 Answers

MelanieRose

08/30/25 5:01am

The reasons for the intermittent cooling of the Kia KX5 air conditioner are as follows: 1. Excessive refrigerant (Freon): After running for a period, high pressure may trigger a protection state, causing the system to stop cooling until it cools down again. Releasing some refrigerant can resolve this issue. 2. Insufficient heat dissipation of the outdoor unit: Check if dust is causing the fan to malfunction. Cleaning the outdoor unit can help. 3. Clogged indoor unit filter: If cold air cannot be blown out, it affects the indoor unit's temperature sensor. The sensor may detect excessively low temperatures, causing the air conditioner to stop. It will resume operation once the temperature rises. Cleaning the filter can solve this problem.

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Lucille

09/12/25 2:12am

I recently encountered a similar issue where the air conditioning cooling was intermittent and quite annoying. There could be several potential causes. For the Kia KX5, the air conditioning system might sometimes have insufficient refrigerant or a leak, causing pressure fluctuations that trip the compressor. Another possibility is poor contact in the compressor's electromagnetic clutch, where aging wiring can easily lead to open circuits. A dirty or inaccurate temperature sensor might cause the control module to misread temperature signals and stop cooling. Loose circuit fuses or relays can also cause intermittent issues. Additionally, a clogged expansion valve or a dirty condenser hindering heat dissipation could interfere. I recommend first checking under the car for any signs of refrigerant leaks—a simple method is to apply soapy water to the pipes and look for bubbles. Leaving this issue unresolved wastes fuel and affects comfort, so it's best to quickly visit a reliable repair shop to test the pressure and recharge the refrigerant, which might cost around one to two hundred dollars. Don't delay, as it could lead to more expensive compressor damage. Also, regularly replace the cabin air filter during maintenance to prevent debris buildup.

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