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| Vacuum
and the auto A/C |
Q:
Does the A/C system have to be vacuumed before recharging?
A: Yes, the A/C system
should always be vacuumed before recharging. Vacuum removes air and moisture
from the system. Removing moisture is important as it creates harmful acids
when mixed with the refrigerants. Those acids will corrode the system internally
and can cause restrictions at the orifice
tube. On the other hand, air causes problems with high pressures and
is very difficult to
diagnose when
it's in an A/C system. The air is considered a contaminant and is a 'non
condensable' Therefore, it will be trapped at the top of the condenser.
The only sure way to remove the air is to vacuum the system before
recharging, and
always be sure the hoses on your gauge set are purged of air.
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the place to get all the right auto A/C service information and help? Then
download your own copy of the AutoACconnection! It's the worlds first and
only 'perpetual' A/C service manual that is constantly updated! Best of all,
it's free! |
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| Our list of FAQ's is growing,
so please visit back often. If you can't find the right answer here, visit
the auto A/C help
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...
