How To Use Auto Air Conditioning Gauges

Blue coupler connects AC manifold gauge blue hose to automotive air conditioning suction service port and red from red to AC discharge service port. The high side is the smaller pipe on the unit.

Automotive Air Conditioning Pressure Gauge Tool R134a Refrigerant Charging Diy Car Wash Pressure Gauge Automotive

How to read and recharge the AC system using pressure gauges.

How to use auto air conditioning gauges. Youll also need temperature probes and a multimeter that accepts K-style fittings. The rotating handle of this AC gauge is made of the strongest special material. With the AC turned OFF - On a cold day the pressure will be low on a hot day the pressure will be high.

An AC gauge is also known as the Manifold AC gauge set is a device which helps in reading and controlling the pressure of the gases to be released for air conditioning. Using a manifold gauge set to diagnose car AC issues. Start your engine and run the ac system with all controls at their maximum setting until it has had time to cool the inside of the car.

You cant really diagnose with just a low-pressure gauge from a DIY AC recharge kit. The gauges readings will depend on the ambient temperature. Car ac blowing hot air after recharge ac gauge fluctuation reading jumps Up Down problem FIX overcharged car air conditioner gauge bouncing in red Car AC p.

Open the low side valve on the manifold gauge set. If the pressure shown on the gauges differ from the manufacturers specs determine the problem and make necessary repairs. Youll need a manifold gauge set if you want to properly diagnose your car AC with gauges.

The color coded red mark the high pressure gauges and its connected to the air conditioner unit discharge valve or liquid line valves. With the engine OFF for at least 30 minutes read the low and high-pressure gauges. They should be the same because the high and low side pressure equalize once the compressor shuts off.

If using manual R134a couplers open the couplers by turning the knob on the top of the coupler clockwise until it stops. Connect the red gauge to the high side service port on the AC unit. It mimics the temperature and pressure of the air conditioning whenever it is operated.

8 offers from 1501 25. R134a Refrigerant Recharge Hose 12 Can Tap Car Air Conditioning Pressure Gauge 36 out of 5 stars 81. After closing both low- and high-side valves on the manifold gauge set connect hoses to respective low- and high-side pressure fittings on the vehicle.

6025 Quick Coupler Manifold Gauge Set Conversion Kit 42 out of 5 stars 82. Attach to the hoses and gauge set to the high and low side ports of your AC system. How to use AC gauges in your car DIY with Scotty Kilmer.

Open the gauges to get the PSI readings on. Connect the high side coupler to the high side port and connect the low side coupler to the low side port. The table below shows the comparison between temperature and pressure for R134a.

How to fix ac problems. The blue hoses are used to connect the manifold to the low pressure side central air units suction line. Connect both high and low R134a couplers to the AC systems service ports.

Some manufacturers even color code the hand valves. Open valve on the refrigerant source. The system should be recovered vacuumed min 20 minutes and charged.

Clockwise switch the redblue knob to open AC service port counterclockwise switch to close. Turn on the AC system and let it run until gauge readings stabilize. For more information about conducting tests using temperature probes see.

3 offers from 829 24.

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