Refrigerant System Tests

WARNING: This page is about a different car, the 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Connect an A/C recovery and/or charging station with gauges, or Connect an R134a manifold gauge set to the refrigerant system. For additional information, refer to MANIFOLD GAUGE SET CONNECTION .
Set the climate control system to MAX A/C (if equipped), or select A/C and RECIRC (if equipped), at HI blower.

NOTE: When the ambient temperature exceeds 38°C (100°F), do not run the engine above normal idle speed.

Run the engine at 1500 RPM for 10 minutes.
Stabilize the vehicle interior temperature at 21°C to 27°C (70°F to 80°F).
Record the high and low system pressures using the R134a Manifold Gauge Set, and refer to the table below.

Fig 1: High And Low Pressure Measuring Chart (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: High And Low Pressure Measuring Chart (2 Of 2)

Courtesy of FORD MOTOR CO.