Rolly Posted February 12, 2019 Report Share Posted February 12, 2019 Hello. I have a 2007 Cadillac CTS 3.6 and I’m having an issue with the ac system. Ac blower blows great but the compressor is not coming on. On the ac control panel the “ac off” lift stays on constantly no matter what buttons I press also on the radio screen the message cones up “service ac system”. I made it as far as checking the fuse which is good and I swapped out the relay and it’s still the same. Just wondering if anyone can help point me in which direction to go from here. Any help is much appreciated Link to comment Share on other sites More sharing options...
sonjaab Posted February 14, 2019 Report Share Posted February 14, 2019 You prob. need a r-134 charge. If the system is out of r-134 then the compressor wont engage. You could buy one of those a/c recharge kits at your local parts store and DIY if your handy. https://www.walmart.com/ip/Supertech-R-134a-Combo-Kit-18-Ounce/105656096 93 DeVille-13 Chevy Impala 72 GTO - 77 Triumph Bonneville 84 Z-28 Syracuse NY Link to comment Share on other sites More sharing options...
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