HVAC Optimization The Importance of High and Low Pressure Ports

The cap should not allow a leak. Some service ports will leak a little . That is why the external cap is used. Put the cap on and check the port ... If you have the proper amount of refrigerant in the system, you shouldn't need a high pressure switch. If the compressor stays running and the ... Standard pressure on the low side should be between 21 and 36 psi, measured with the blower on high, max cool, engine running at 1500 rpm. It is in the discharge line. Wear safety goggles and gloves when servicing high pressure components. If you find low pressures, you likely have a leak. The smaller fitting is the high pressure side. The larger fitting is low pressure side and is for charging. As noted, you need some real gages. I suspect your high reading is while the compressor is cycled off, in which case high side and low side will ... Typically the low pressure port is located close to the AC accumulator and not the compressor although it is possible as this is a conversion. 3 Symptoms Of A Bad AC Pressure Switch [HIGH OR LOW]. Mechanic Base ... GM Air Conditioning Pressure Switch Problem and Replacement!! LOW, LOW, Add Refrigerant. ; LOW, HIGH, Need service, possible blockage of the expansion valve or orifice tube. ; HIGH, LOW, Needs service, possibly faulty ... Asking because we at the shop charge through the high side port, but it takes way longer and sometimes the machine can't even pump it well ...