Rick's Free Auto Repair Advice

Posts Tagged: refrigerant leak symptoms

AC Low Side Pressure is too Low: Explore the Causes

The Most Common Causes of Low Side Pressure Too Low Quick Summary When the low side pressure is too low, the root cause is usually low refrigerant due to  a leak, a restriction at the expansion device, or poor evaporator performance. Normal low-side pressure typically sits around 30–40 psi, and when it drops too low, cooling performance suffers—or disappears entirely. The key is not guessing. I rely on pressure readings, temperature behavior, and system response tests to pinpoint the exact cause and fix it correctly. My Real-World Take on Low … Read More

10 Reasons Your Car AC Isn’t Blowing Cold After a Recharge

The Most Common Reasons an AC Isn’t Blowing Cold After a Recharge Quick Summary If your AC isn’t blowing cold after a recharge, don’t assume you need more refrigerant. In my experience as an automotive technician, the most common causes are; • An incorrect refrigerant charge • A refrigerant leak • A failing compressor • A clogged expansion valve or orifice tube • Blend door problems • Cooling fan failures • Electrical faults. The key is to diagnose the root cause rather than repeatedly adding refrigerant. In this article, I’ll … Read More


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