Kia Sorento 2001 General Information Manual page 1249

Blower switch
1. Check continuity between terminal of blower switch.
2. If not as specificed, replace blower switch.
Insufficient cooling, No cooling, Intermittent cooling
1. Checking refrigerant charge.
(1) Run engine at a fast idle.
(2) Operate air conditioner at maximum cooling for a few minutes, go to Step 2.
2. Checking refrigerant pressure.
(1) Connect A/C manifold gauge set.
(2) Operate engine at 2,000 rpm and set air conditioner to maximum cooling.
(3) Measure low-and high-pressure sides.
Normal pressure
Low-pressure side : 20~41 psi (137~284 kPa, 1.40~2.90 kg/cm²)
High-pressure side : 185~263 psi (1,275~1,814 kPa, 12.0~18.5 kg/cm²)
(4) If pressures are not as specified, refer to following chart and check system.