Why Does Your Car’s AC Compressor Keep Turning On and Off?

If your car’s air conditioning compressor keeps cycling on and off—running for 20 seconds, shutting off for 5 seconds, then repeating—you are not alone. This issue is common worldwide and often points to hidden problems inside the automotive air-conditioning system.

At Qirun Auto Parts Co., Ltd., we have specialized in automotive AC control valves for more than 25 years, supplying global buyers with reliable, high-quality solutions. Here we share insights into the causes and solutions of this problem, helping international distributors and importers find the right products.

Common Reasons for AC Compressor Short Cycling

• Low Refrigerant – Insufficient refrigerant charge can cause fluctuating pressure, forcing the compressor to turn on and off frequently.
• ABS Module or Electrical Issues – A faulty ABS module can interfere with the body control module, disrupting AC compressor signals.
• TX Valve (Expansion Valve) Malfunction – A sticky or faulty TX valve can cause the pipe between the compressor and valve to freeze, leading to inconsistent cooling.
• Warm Air in the Cabin – Short cycling often results in warm air, which may be due to control module or valve issues.

Why Accurate Diagnosis Matters

A professional automotive AC specialist will check refrigerant levels, inspect the TX valve, compressor, and the HVAC control system. Replacing faulty parts with high-quality AC control valves is crucial to ensure long-term reliability.

Qirun Auto Parts – Your Trusted Partner

With over 25 years of expertise, Qirun Auto Parts Co., Ltd. is a global leader in electric control valves for automotive air-conditioning systems. Our products are trusted worldwide for their durability, precision, and energy efficiency.

We specialize in:

• Automotive AC Control Valves
• HVAC System Components
• Custom Solutions for Automotive Manufacturers and Distributors

Conclusion

If your AC compressor keeps cycling on and off, the cause may be refrigerant levels, electrical interference, or a faulty TX valve. Choosing a reliable supplier of automotive AC control valves ensures consistent vehicle performance and customer satisfaction.

📩 Contact Qirun Auto Parts today to learn how our high-quality AC control valves can support your business globally.