Operation - Dodge Dakota Sport 2001 Service Manual

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.
The low side pressure is
normal or slightly low, and
the high side pressure is too
low.
The low side pressure is
normal or slightly high, and
the high side pressure is too
high.
A/C Diagnosis
Possible Causes
1. Excessive refrigerant oil in
system.
2. Blend door actuator
inoperative or faulty.
3. Blend door inoperative or
sealing improperly.
4. Faulty evaporator.
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 a/c compressor.
1. A/C condenser air flow
restricted.
2. Inoperative cooling fan.
3. Refrigerant system
overcharged.
4. Air in the refrigerant
system.
5. Engine overheating.
6. Faulty orifice tube.
Correction
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.
4. Refer to evaporator section.
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
a/c orator, if required.
4. (Refer to Plumbing/A/C Compressor/Removal/
Installation in this group. Replace the a/c
compressor, if required.
1. Check the a/c condenser for damaged fins,
foreign objects obstructing air flow through the
condenser fins, and missing or improperly
installed air seals. Refer to Cooling for more
information on air seals. Clean, repair, or replace
components as required.
2. Refer to Cooling for more information. Test the
cooling fan and replace, if required.
3. (Refer to Plumbing/Standard Procedure -
igerant System Charge) in this group. Recover
the refrigerant from the refrigerant system.
Charge the refrigerant system to the proper level,
if required.
4. (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.
5. Refer to Cooling for more information. Test the
cooling system and repair, if required.
6. Refer to orifice tube section.
AN