How To Charge an Auto AC System
In this video I show you how to properly charge an empty automotive R134a
A/C system after servicing it.
I can not stress safety enough when working with refrigerant gloves and
safety glasses are a must.
Equipment wise the bare minimum you will need is a manifold gauge set, a
motorized vacuum pump, disposable refrigerant cans, and a tapping valve.
If your system has ANY refrigerant in it as indicated by your gauge set you
MUST have it evacuated before disassembling the system. Venting refrigerant
from the system to the atmosphere is against EPA regulations.
Intro and outro music Welcome To The Show by Kevin Macleod
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Automotive HVAC Pressure Diagnostics
Automotive HVAC Pressure Diagnostics...
Pressure analysis diagnostics is the cornerstone of properly doing a
climate control system assessment. As we all know, the HVAC systems is
composed of a high and a low pressure side. The orifice tube or expansion
valve is the one components in between these two refrigerant conduits. The
compressor of course is the one in charge of pressurizing the refrigerant.
Pressure analysis is by far the best, and probably in many cases, the only
way to properly diagnose the dozens of specific issues with the automotive
But first, here are the various scenarios relating to pressure analysis.
Before we go into it, it is important to understand what the baseline
pressures should be. The normal HVAC baseline is about 39 PSI on the
Low-Side, and about 250 PSI on the High-Side. How far away we deviate from
this baseline, is what's going to determine our issue. Here are the
different analysis scenarios.
Case 1... High pressure on the Low Side and baseline pressure on the high
side. This may translate to say about ...
Get the whole story right now in this video... Enjoy...