Troubleshooting Your AC Compressor Not Taking Gas: What You Need to Know

Many homeowners encounter issues when trying to refill the AC refrigerant in their systems. If your AC compressor is running but not taking gas, it is crucial to understand the potential causes and appropriate steps to take to resolve the issue.

Why Not Refilling?

Frequent adjustments and improper handling of refrigerant systems can lead to a variety of complications. Here are some potential reasons why your AC compressor might not be taking gas when you try to refill it:

Overcharging from previous tampering Incompatibility between old and new can types Misunderstanding the reason for refrigerant refill

If you're unsure about what you're doing, it's better to stop and avoid potential hazards. Improper handling can lead to injuries or serious damage to the system.

Safe and Effective Steps

The best approach to address this issue is to:

Turn off the unit and unplug it Use a vacuum pump to evacuate the entire system Recharge with the liquid refrigerant according to weight measurements

Ensuring that the system is properly evacuated before adding refrigerant is crucial to prevent refrigerant from not being properly absorbed by the unit.

Legal and Safety Considerations

Most AC refrigerants are blends and cannot be legally purchased in the US, at least. As a blend, these refrigerants must be added as a liquid to ensure the correct percentages. Improper filling can result in severe damage to the compressor.

It is highly recommended to:

Test for leaks and repair any issues Recover the existing refrigerant Evacuate and purge the system Install new refrigerant by weight, ensuring accurate proportions

If the issue persists, it is best to:

Check whether the freon is being introduced on the low pressure side (large diameter line) Verify if you used a vacuum pump on the system for an hour before attempting to add refrigerant Confirm if you closed the system off for an hour to ensure it held a vacuum Ensure you have the correct Schrader valve to allow the valve on the AC line to stay open while introducing refrigerant Look for a blockage in the system, most likely at the orifice tube

Remember, these repairs are not DIY jobs. It may be illegal in some countries to tamper with AC systems without the required certification. Consult a professional technician to ensure the safety and longevity of your system.

Take your unit to a specialized AC repair shop where experts can diagnose and fix the issue. Proper maintenance and expertise in handling refrigerants are essential to avoid potential complications and ensure your AC system operates efficiently.