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| Recharging
& refrigerant (freon) for the auto A/C |
Q: How
can I tell if my auto A/C system is low on refrigerant?
A: The truth really
is, there is no easy way to tell if your auto A/C system is low on
refrigerant. The pressure gauge readings provide a pressure, not the
amount of refrigerant in the system. Therefore, connecting a set of pressure
gauges and taking a pressure gauge reading will not tell you that the system
is low on refrigerant. However, you should know that experienced A/C
service technicians generally understand what the pressure should be.
With that experience, they can quickly test for low refrigerant charge by
adding a small amount of refrigerant (usually between 3-4 oz.). This is a
common practice when
diagnosing the auto
A/C system. By adding the refrigerant, the service technician is trying
to see if the pressure gauge readings improve. If they improve, then
the small amount of refrigerant confirms that the system was low to start.
If the pressure gauge readings do not improve with a small amount of refrigerant
added, there are other problems or restrictions in the A/C system. More
information is available about understanding
the pressure gauge readings of your auto A/C system.
NOTE: Adding refrigerant
to an A/C system may not be legal in some jurisdictions. We mention adding
refrigerant for 'test purposes' only. Usually between 3-4 oz. is adequate
to determine if the A/C system is low on refrigerant. From our experience,
most jurisdictions allow for small amounts of refrigerant to be
added for testing.
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only 'perpetual' A/C service manual that is constantly updated! Best of all,
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so please visit back often. If you can't find the right answer here, visit
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and discussion board at the COOL ZONE. You'll get all the right answers
to your questions about troubleshooting and diagnosing auto A/C systems. |
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This
was probably one of the best books on recharging air conditioning that I
have seen...
