how to use ac gauges sorted by

relevance

If you find that the coupler is not fitting onto your low side service port then stop! Measure static pressure With the AC system off for at least 30 minutes, check the pressure readings on the high and low side gauges.

The compressor might make excessive noise, the sound of it struggling to shove liquid coolant through a tiny nozzle designed for gas molecules.

Pressure that is too much lower or higher shows there is a problem.

Color-coded high, low pressure adjusted to the zero points, and digital devices are convenient for use.

GENERAL MANIFOLD INFORMATION: The right red side of the manifold is the high side and the red gauge is the high pressure gauge.

Depending on the manufacturer and the ability to know about how to read AC gauges the device can be known for its efficiency.

Universal manifold sets with fittings for both refrigerants are available, should you have an older vehicle or be unable to determine what kind of refrigerant is in your car or truck.

If your system is within 25 to 44 psi, it has the proper amount of freon.

Familiarize yourself with the gauge as there are a variety of gauges out there with some differences amongst them.