How to use an ac manifold gauge set

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How to use an ac manifold gauge set. 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. 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. Make sure that your car or truck does not overheat.

A manifold gauge set will have red blue and yellow hoses. The blue hose goes to the low pressure gauge. The yellow hose can go to either low side or high side depending on which valve is open.

The red hose goes to the high pressure valve. The center where everything attaches is called the manifold. Connect both high and low couplers to the AC systems service ports.

After connecting the couplers open them by turning the knob on the top of it clockwise until it stops. Open valve on the refrigerant source. Open the low side valve on the manifold gauge set.

Charge system until gauges read over 50 pounds of pressure. Hook the screw fitting of the yellow hose from the gauge to the in-port nozzle on the vacuum pump if you need to pull vacuum from an AC system or recover refrigerant from an existing system. Turn the vacuum pump on to Vacuum and open both the red and blue knob valves on the gauge.

Some AC gauge sets come with an additional yellow hose. Connect to AC System to Diagnose the AC System. Close all valves on the manual service couplers and manifold gauge set.

Connect the high side coupler which is connected to the red hose to the vehicles high side service port and connect the low side coupler which is connected to the blue hose to the vehicles low side service port. The manifold gauge uses flexible hoses with connector on both sides. These hoses are label with maximum pressure in PSI or bar.

This mean that if someone used the wrong hoses with the wrong pressure it will burst. The compound gauge located in the left hand of HVAC gauges. The compound gauge is mounted on the left side of the air conditioning gauges.

Connect the blue hose to the low pressure port on the AC. Connect the red hose to the high pressure port of the AC. Open the valves and take the PSI readings.

If they are lower than the normal reading add refrigerant to the system until the reading is normalized. Keep the manifold gauge set clean for safer performance. Restart the vehicle and screen the measure.

Restart the vehicle and ensure the climate control system is on the most elevated settings. Start to screen the measure by looking for the AC blower to connect with the grasp. When the blower is locked in if the low side weight is under 40 psi it is checked that the AC framework is undercharged.

Tutorial on How to Use and Read a REFRIGERANT GAUGE SET to read pressure saturated temperature superheat and subcoolingThis is How to Read a Gauge Set t. Using a manifold gauge set to diagnose car AC issues. Youll need manifold gauge set if you want to properly diagnose your car AC with gauges.

You cant really diagnose with just a low pressure gauge. Youll also need temperature probes and a multimeter that accepts K-style fittings. For more information about conducting tests using.

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Close the valves on the manifold gauge set by turning the valve handles clockwise. Next turn the vacuum pump off. Let the unit sit for 15 or 20 minutes to see if the unit holds the vacuum.

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Connect the low pressure side to the blue port on the gauge. The low pressure side will be connected with a blue low pressure hose to the blue pressure gauge and the low pressure side of the cooling unit. This will allow for the proper flow of vacuum pressure or a micron meter in order to determine the vacuum pressure in the system already.

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