WebHere are some simple steps for checking the AC system with a pressure gauge: Measure the pressure while the engine is off. If the gauges on the high and low pressure sides read more than 150 psi,... If the pressure is extremely low or reads zero, there is little or no refrigerant … WebMar 22, 2012 · The high-side pressure, which the FSM gives only somewhat roughly as higher than 2xx psi (my GM manuals have pressure tables based on humidity and ambient temp, it changes a lot), never goes above about 150 psi at 1500 rpm as specified. Items to note: -it does cool OK, but given that it's only low 80s now, I can tell it should do more.
Problem with A/C and fan and high PSI - Ford Truck Enthusiasts Forums
WebMay 28, 2024 · In a normally functioning system, high side maxes out at around 350psi with ambient temps over 100 degrees in high humidity. Again, you'd have to have a blockage or a bad sensor. FWIW, the fan clutch is a problem in these trucks. The “coil” or speed sensor in the clutch goes bad and the computer commands the clutch to 100% duty. WebJun 22, 2024 · With ambient temperature around 70 degrees the low side pressure is about 30 psi, and the high side pressure is around 150. The air at the vent is barely cool. If you put your hand on the high side line it is neither warm or cool. The low side line is cool (not cold) to the touch. A.C. clutch is on, Electric fan is spinning. grandally
Low side normal /high side low stumped - Automotive Air …
WebJul 5, 2008 · You charge by weight not by pressure (at least if you are doing it right). Operaating pressures vary with climate. Low side operating pressure can range from 20-40 psi, high can be 300-400. This depends on the ambient temp and humidity. (higher heat/humidity will cause the higher pressure. WebIn this article, we will discuss an HVAC unit’s refrigerant pressure on both the high side and the low-pressure side while the system runs. It is important to know the range of these pressures in order to understand why and how charging and recovery are performed. The first thing to realize is that when a system is off and equalized, the system’s pressures on … WebDec 5, 2024 · The pressure reading from the low side should be between 25 and 30 psi and the high side between 200 and 250 psi. But if you see the AC low side high, high side low , such as the low side is 100 and the high side … china willow fence panels