A/C trouble

2005 CHEVROLET TAHOE
148,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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HOWARD7
  • MEMBER
  • 1 POST
A/C blows mildly cool in front heater blows okay, rear A/C blows good cold air. low pressure line is cold output line is slightly cool. replaced very bottom actuator but no change. there are two others i believe one on top and other re circulation maybe i am wrong. could it be A/C evaporator or actuator trouble?
Jun 3, 2019 at 9:15 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good morning,

Can you give me the high and low side readings of the system with the engine running?

Below is the procedure and a picture of the actuator.

Roy

REMOVAL PROCEDURE
1. Remove the I/P insulator panel.


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2. Disconnect the electrical connector (1) from the left air temperature actuator (2).
3. Remove the screws from the left air temperature actuator (2).
4. Remove the left air temperature actuator (2) from the HVAC module assembly (3).
Image (Click to enlarge)
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Jun 4, 2019 at 3:16 AM
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HOWARD7
  • MEMBER
  • 1 POST
Low side 35 high side 190. Replaced accumulator, orifice tube and low pressure port. vacuumed system no leaks. Also have clicking behind radio when key is turned on for a few seconds. don’t know if that information would help.
Jun 4, 2019 at 11:39 AM
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