Quote:
Originally Posted by compu_85
I've noticed the low side pressure seems to move around a lot... like the TX valve is sticking? I got a video of it:
350 SDL AC pressure - YouTube
Any thoughts?
-J |
if the txv was sticking, it would NOT fluctuate, or it would pump down into a vacuum...
the txv's job is to maintain a specific superheat value. if the load is low, the superheat will drop, so the txv throttles back the flow of refrigerant to raise the superheat back to it's set value.
raise the blower speed, and the fluctuating will stop.
the value is not to hold a certain vent temp, it's to maintain a specific amount of heat rise over the vapor pressure of the refrigerant in the evaporator. if the vent temps are high, either the heat mix is high, or the refrigerant volume is high.