AC not working low side ok ........

[Ertech]

Hi guys , AC intermittent. compressor engages ,I put the gages low pressure I think is ok high side does not go up .AC does not cycle on and off . ambient temperature 85 . I suspect expansion valve or compressor not pumping . what are your thoughts .
thanks
Erick

 

[gsxr]

Can you unlock the video? And are you certain the compressor is running continuously?

 

[Ertech]

Basically shows this the pressures don’t really move and the compressor is running

 

[gsxr]

High pressure is 150psi so the compressor is compressing. I assume vent temps are like 60-70F?

Might just be low on charge.

 

[Ertech]

I just went to my Mechanic friend who has the big machine he did a vacuum then added 2.2 pound and the high-pressure is not moving just like that picture he suspects the expansion Valve

 

[gsxr]

With a full charge... yeah... the TXV would be my next guess. There is nothing else in the system that would cause this, AFAIK.

However - what are the vent temps? If it's blowing 45°F air out the vents, I wouldn't worry about the gauge readings.

 

[Ertech]

Vents are hot. Thanks for the confirmation. Let you guys know

 

[gsxr]

Ohhhhhh. Yeah - based on what you describe, sounds like it could be a a bad TXV. Unfortunately that requires another evacuation & recharge. Replacing the TXV is not fun, access to it is very limited / tight space to work in.