Dodge 2001 Ram 1500 Owner's Manual page 2733

24 - 4 HEATING & AIR CONDITIONING
HEATING & AIR CONDITIONING (Continued)
Condition
NORMAL PRESSURES,
BUT A/C
PERFORMANCE TEST
AIR TEMPERATURES AT
CENTER PANEL
OUTLET ARE TOO
HIGH.
LOW SIDE PRESSURE
IS NORMAL OR
SLIGHTLY LOW, AND
HIGH SIDE PRESSURE
IS TOO LOW.
A/C Diagnosis
Possible Causes
3. Faulty a/c compressor
clutch coil.
4. Faulty a/c compressor
clutch relay.
5. Improperly installed or
faulty a/c low pressure
switch.
6. Faulty a/c high
pressure switch.
7. Faulty Powertrain
Control Module (PCM).
8. Faulty a/c heater
control.
1. Excessive refrigerant
oil in system.
2. Blend door actuator
inoperative or faulty.
3. Blend door
inoperative, obstructed or
sealing improperly.
1. Low refrigerant system
charge.
2. Refrigerant flow
through the accumulator
is restricted.
3. Refrigerant flow
through the a/c
evaporator is restricted.
4. Faulty compressor.
3. (Refer to Controls/A/C Compressor Clutch Coil/
Diagnosis and Testing) in this group. Test the compressor
clutch coil and replace, if required.
4. (Refer to Controls/A/C Compressor Clutch Relay/
Diagnosis and Testing) in this group. Test the compressor
clutch relay and relay circuits. Repair the circuits or
replace the relay, if required.
5. (Refer to Controls/A/C Low Pressure Switch/Diagnosis
and Testing) in this group. Test the a/c low pressure
switch and tighten or replace, if required.
6. (Refer to Controls/A/C High Pressure Switch/Diagnosis
and Testing) in this group. Test the a/c high pressure
switch and replace, if required.
7. (Refer to Appropriate Diagnostic Information) for testing
the PCM. Test the PCM and replace, if required.
8. (Refer to Controls/A/C Heater Control/Diagnosis and
Testing) in this group. Test the a/c heater control and
replace, if required.
1. (Refer to Plumbing/Refrigerant Oil/Standard Procedure
- Refrigerant Oil Level) in this group. Recover the
refrigerant from the refrigerant system and inspect the
refrigerant oil content. Restore the refrigerant oil to the
proper level, if required.
2. Check the Blend Door Actuator operation. Replace as
required.
3. (Refer to Distribution/Blend Door/Removal/Installation)
in this group. Inspect the blend door for proper operation
and sealing and correct, if required.
1. (Refer to Plumbing/Diagnosis and Testing - Refrigerant
System Leaks) in this group. Test the refrigerant system
for leaks. Repair, evacuate and charge the refrigerant
system, if required.
2. (Refer to Plumbing/Accumulator/ Removal/Installation)
in this group. Replace the restricted accumulator, if
required.
3. (Refer to Plumbing/A/C Evaporator/ Removal/
Installation) in this group. Replace the restricted
evaporator, if required.
4. (Refer to Plumbing/A/C Compressor/ Removal/
Installation) in this group. Replace the compressor, if
required.
Correction
BR/BE