Indy1K
TYF Newbie
I have an 07 Tahoe LTZ with the automatic air conditioning and rear air. I had a problem with the A/C freezing up inside the cabin causing the roaring sound and no air or a bit of warm air coming out. If I would turn off the A/C control for a few minutes and let it thaw out, It would work fine for a little while again. I also knew I had a slight leak at the rear expansion valve. Recharging didnt help the problem.
I was told different things so I replaced the rear expansion valve, the orifice tube in front (none in rear), the accumulator, the low pressure switch on the accumulator, evacuated the system. Checked to make sure I held vacuum, recharged the system and it seems to be working well. Low side pressure is around 45psi and high side is around 160psi. 40degs coming out of vents. fan slows down as cabin cools to set temp and it does not seem to be freezing up anymore.
My question is: on the 07 Tahoe, does the A/C compressor cycle on and off as needed to keep from freezing up? I am trying to get a definitive correct expert answer on this, because I get conflicting information. Some say yes it cycles, some say no it doesnt or only when the inside or outside air button is pressed.
If it is supposed to cycle on and off, what else can prevent that from happening? Is there another pressure switch? I have also changed out the Cabin Climate control module.
Thanks in advance.
Kevin
I was told different things so I replaced the rear expansion valve, the orifice tube in front (none in rear), the accumulator, the low pressure switch on the accumulator, evacuated the system. Checked to make sure I held vacuum, recharged the system and it seems to be working well. Low side pressure is around 45psi and high side is around 160psi. 40degs coming out of vents. fan slows down as cabin cools to set temp and it does not seem to be freezing up anymore.
My question is: on the 07 Tahoe, does the A/C compressor cycle on and off as needed to keep from freezing up? I am trying to get a definitive correct expert answer on this, because I get conflicting information. Some say yes it cycles, some say no it doesnt or only when the inside or outside air button is pressed.
If it is supposed to cycle on and off, what else can prevent that from happening? Is there another pressure switch? I have also changed out the Cabin Climate control module.
Thanks in advance.
Kevin