Ac Gauge Reading Chart. Louver controls set at max cold air settings (max ac) blower set at high speed. It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges.
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The gauge displays different pressure readings during operation and to interpret those readings against temperature, you will need a pressure chart, or an r134 pressure chart to be precise. Notice the scale on this high side gauge reads from 0 to 500 psi. You won't need any expensive automotive ac gauges for this test.
Here Are The Details In This Chart.
You won't need any expensive automotive ac gauges for this test. For more information on normal ac pressures, see the charts below. Low side gauge reading will restriction thermostatic switch compressor running 1 check all com 1 check fuse and high side:
11 Rows Low Pressure Gauge High Pressure Gauge Inference/Action Required;
An overcharged ac system in your car can also cause your pressure readings to be off on the low side. Its easy to perform a car ac check yourself with just a few minutes and a handy tool. As the ambient temperature rises the red gauge rises (40psi up to 225psi) and the blue gauge remains at a constant low (20psi to 35psi).
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Normal conditions air in cooling system (insufficient suction) Also make sure that the silver terminal on the gauge has a good ground to the cluster. Normal high and low ac ambient temperature pressure listing.
Hvac Gauge Diagnostics Gauge Pressure Is One Of The First Readings You Should Analyze When Troubleshooting Your Ac.
Note that pressure gauge readings vary with ambient air temperature, humidity and system design. Therefore, we have listed down seven gauge readouts you may likely face: It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges.
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It’s so valuable, in fact, that onallcylinders contributor lori sams put together this visual cheat sheet to help you understand common gauge readings. You also need to look at your temperature gauge. The red, high side gauge is used to measure the high pressure side of the a/c system.
