djfell80
TYF Newbie
- Joined
- Aug 1, 2022
- Posts
- 10
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To start: I did search through many posts and could not find someone experiencing this exact issue. If there is one, please let me know. Thanks in advance for all assistance!
So...just bought a 2005 Z-71 Tahoe, 215,*** miles. The AC seemed to be working mostly well when I drove it for the test drive. However, after purchase (same day) my wife, and I, went to run some errands. After shutting the engine off at one store, then starting after done shopping, the vents were not blowing cold air any longer. When straight home, no one wants to drive around without AC on a 105 degree day in central Texas.
Here is what I have found/done/etc.:
A) Compressor not kicking on. However, if you let it sit overnight it comes on at first, air cools accordingly. Then when you start to drive it the clutch kicks in and out, then the compressor stops altogether.
B) Changed the Climate Control Module (screen was cracked anyways and it bothered my wife).
C) Compressor clutch does engage when relay removed and terminals jumped.
D) Refrigerant pressures (when relay jumped) seem to be within margins for the high ambient temps (50psi/230psi+/-) however the air doesnt blow cold and the high/low lines are both warm/hot.
E) Jump low pressure switch - nothing happens.
F) I did notice dye sitting in the low pressure port (not sure if the previous owner was having other issues as well). No dye leaking from the condenser, evap, lines, fittings, etc. that I could tell.
Took it to shop yesterday and they called me to say it needed a new low and high pressure switches and the module. I said that I replaced the module, and did the tests on the switches and they only responded with "Oh...". I did also mention these items to them when I dropped it off for the diagnosis, so I am sure the service advisor did not mention it to the service technician. However, I agreed to let them keep it overnight and to get back with me, hopefully sometime today (8/2/22).
So...just bought a 2005 Z-71 Tahoe, 215,*** miles. The AC seemed to be working mostly well when I drove it for the test drive. However, after purchase (same day) my wife, and I, went to run some errands. After shutting the engine off at one store, then starting after done shopping, the vents were not blowing cold air any longer. When straight home, no one wants to drive around without AC on a 105 degree day in central Texas.
Here is what I have found/done/etc.:
A) Compressor not kicking on. However, if you let it sit overnight it comes on at first, air cools accordingly. Then when you start to drive it the clutch kicks in and out, then the compressor stops altogether.
B) Changed the Climate Control Module (screen was cracked anyways and it bothered my wife).
C) Compressor clutch does engage when relay removed and terminals jumped.
D) Refrigerant pressures (when relay jumped) seem to be within margins for the high ambient temps (50psi/230psi+/-) however the air doesnt blow cold and the high/low lines are both warm/hot.
E) Jump low pressure switch - nothing happens.
F) I did notice dye sitting in the low pressure port (not sure if the previous owner was having other issues as well). No dye leaking from the condenser, evap, lines, fittings, etc. that I could tell.
Took it to shop yesterday and they called me to say it needed a new low and high pressure switches and the module. I said that I replaced the module, and did the tests on the switches and they only responded with "Oh...". I did also mention these items to them when I dropped it off for the diagnosis, so I am sure the service advisor did not mention it to the service technician. However, I agreed to let them keep it overnight and to get back with me, hopefully sometime today (8/2/22).
