Hard shut off extension valve after 15 minutes low only 170 psi 200+ high side 

Still will take a long time for that low side to get up to the high side pressure because of the type of expansion valve used 

[@hashslinginhasher]

There's so much i need to learn 😅😭

[@coldfinger459sub0]

@@hashslinginhasher yes a lot of parts get replaced unnecessarily from not knowing
And sometimes a lot of parts do not get replaced because of not knowing

[@davidellingwood4075]

What is a hard shut off expansion valve? I thought the temperature of the low side would keep the valve open until the temperature drops low enough to close the valve. If the valve is closed, does that mean the system is balancing through the compressor?

[@coldfinger459sub0]

@@davidellingwood4075 there is a very, very slow bleed by through the expansion valve. It’s not 100% perfect seal..
And some hard shut off expansion valves, bleed by a little faster than others
The cold temperature shut off or close down based on temperatures through the diaphragm control of the refrigerant pressure on the bulb side and combination of spring pressure and refrigerant pressure all these forces combat and fight each other over control whether to open or close off or somewhere in between the pin that travels up and down
And this is control superheat while the compressor is running in refrigerant is flowing
I have put links to educational videos on this topic few months ago on the Facebook group
Automotive HVAC technicians