A/C retard on low side

2006 ACURA TSX
205,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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BRIDGET BRYANT
  • MEMBER
  • 1 POST
A/C reading retard on low side. compressor cuts out.
May 28, 2019 at 9:12 AM
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KASEKENNY
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 18,907 POSTS
Hi Bridget Bryant,

This happens when there is a clog in the system such as the expansion valve because the refrigerant is not flowing back into the compressor. A car may have an orifice tube as well, also causing not enough refrigerant returning to the compressor so it pulls into pressure retard mode (vacuum). Check out the images below for more explanation.

Thanks
May 28, 2019 at 2:36 PM