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No Low Side Pressure

dirt on Sun April 05, 2015 7:34 PM User is offline

Year: 2004
Make: Honda
Model: Accord EX
Engine Size: 2.4l
Refrigerant Type: 134A
Ambient Temp: 64
Pressure Low: 0
Pressure High: 65
Country of Origin: United States

The A/C gauge reads zero pressure on the "low side." The high side reads 65 psi. I have verified the gauges are functioning correctly. The compressor "does not cycle" it stays on. The compressor is not noisy. Both lines, low and high pressure going into the firewall are cool. Cool air blows out the passenger's vent next to door. Hot air blows from the driver's vent. The two middle vents: The one for the passenger blows a little cool. The driver's middle vent is warm. All the inside dash components are functioning correctly as I performed the diagnostic test. Any ideas? thank you

mk378 on Sun April 05, 2015 8:01 PM User is offline

Have you verified the charge amount by weight? If not, recover and recharge by weight first. Often what you describe is simply an undercharge resulting from leaking out.

dirt on Sun April 05, 2015 8:07 PM User is offline

That was my thinking. But the compressor should disengage with zero pressure on the low side??? thanks

mk378 on Mon April 06, 2015 9:26 AM User is offline

TXV cars usually have no pressure sensor on the low side. High side pressure only needs to be 50 or so to engage the compressor.

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