Car AC Diagnostics
AC Manifold Guages
It may seem crazy to talk about car AC diagnostics in the middle of a snow storm. But by the time this page gets indexed and ranked you should be ready to turn on your vehicles air conditioning for the first time after a long winter of not using it.
On a previous post about air conditioning auto repairs I discussed how to test your system using manifold gauges. We also discussed how important the total charge of the system is to air-conditioning performance.
On this page will be some tips on how to deal with pressure readings that are out of specifications. Also included will be some best practices for Car AC diagnostics as well as running system AC performance testing properly. And don’t forget to wear safety equipment because freon is dangerous.
High side pressure readings
When you’re basing your diagnostics off of system pressure it is very important to refer to the pressure charts in your online auto repair manuals. These pressure readings will vary greatly with humidity and outside temperature.
Improper diagnosis is often caused by expecting an unrealistic reading on a hot humid day. With that said if you have determined that your pressure readings are truly off here are some tips on what they could actually mean. Read more
