Free PDF guide
Car A/C Pressure Chart and Diagnosis
What the gauges should read for the outside temperature and which fault each reading points to.
- 6-page PDF, ready to print or read on your phone
- Instant download, plus a copy of the link in your inbox
- Free in exchange for your email
- Available in English and Spanish
Hooking up the gauges is easy; knowing whether the pressures are right depends on the weather. This guide has the low- and high-side pressure chart by ambient temperature, in psi and bar, and how to measure so the reading means something.
With gauge drawings it shows the 8 most common readings and the fault behind each one (low charge, restriction, weak compressor, moisture...) and includes the R134a pressure-temperature chart.
What the guide covers
- How the system works: high and low side
- How to hook up the gauges and measure correctly
- Normal pressures by ambient temperature
- What the gauges are telling you: 8 diagnoses
- R134a pressure-temperature chart
- Related codes
