AC pressure switch location/troubleshooting - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Sebambam · 03-06-2021, 10:36 AM

hi Guys
I just got a 010 L99 SS

My AC doesnt blow cold . Heat works
Compressor Clutch turns by hand .Fuses are OK, Relay is OK.

So i would like to Jump the AC pressure switch to see if it jumps on then i know its low on refrigerant ( i guess).

Where is the exact location of the Pressure switch ? is there only 1 pressure switch? i assume it could be this one here near the HIGH side port?

any other options to verify if my compressor is done?

Silver14 · 03-06-2021, 10:44 AM

Check out the diagram on this parts page for the pressure sensor location.

https://www.gmpartsdirect.com/oem-pa...Y4LWdhcw%3D%3D

Sebambam · 03-06-2021, 02:18 PM

Quote:

Originally Posted by Silver14

Check out the diagram on this parts page for the pressure sensor location.

https://www.gmpartsdirect.com/oem-pa...Y4LWdhcw%3D%3D

thanks but that dont tell me exactly the location , i guess the diagramm shows it somehow but i cant really tell.

Badbubba · 03-09-2021, 10:35 AM

Be certain you know what your doing before you start jumping things out. This "switch" stated above appears to be a sensor. 3 wires. Is the clutch engaging? I would think there should be a low pressure switch/sensor, and that would appear to be the sensor in the diagram. If so, it would be on the larger diameter pipe, suction line. Could it be the blend door?

G8One2 · 08-09-2021, 08:17 PM

Its a sensor, not a switch. The ECM receives the command from the HVAC module to engage the compressor clutch. The ECM is what send the ground signal to energize the A/C clutch relay. If you want to force it to engage, there are ways to do that, but NOT by jumping any wires on the pressure switch.

03-06-2021, 10:36 AM	#1
Sebambam Drives: 2010 2SS Join Date: Feb 2021 Location: Duncanville TX Posts: 17	AC pressure switch location/troubleshooting hi Guys I just got a 010 L99 SS My AC doesnt blow cold . Heat works Compressor Clutch turns by hand .Fuses are OK, Relay is OK. So i would like to Jump the AC pressure switch to see if it jumps on then i know its low on refrigerant ( i guess). Where is the exact location of the Pressure switch ? is there only 1 pressure switch? i assume it could be this one here near the HIGH side port? any other options to verify if my compressor is done? Attached Images

03-09-2021, 10:35 AM	#4
Badbubba GrINned & JUICEd Drives: 15STI, 10Expy, 10 2SS/RS M6, 47KB1 Join Date: Nov 2009 Location: Pittsburgh, PA Posts: 1,251	Be certain you know what your doing before you start jumping things out. This "switch" stated above appears to be a sensor. 3 wires. Is the clutch engaging? I would think there should be a low pressure switch/sensor, and that would appear to be the sensor in the diagram. If so, it would be on the larger diameter pipe, suction line. Could it be the blend door? __________________ GPI SS3 Cam & stuff,N.O. Plate(dedicated fuel tank,progressive,fuel hose upgrade,remote opener,heater,console switches),LNC2000,CTAP,ARH 1 7/8" LTs/gutted cats/X pipe/mufflers,Jet Hot coated LTs,GPI HPT Tune,CAI, Scoop,Rx Catch Can,Gates heater hose relocation, Remote clutch & auto brake res,Metco loop,Momentum Tunnel Brace,TSW Nurb 18",555 & 05,Pfadt trailing arms & toe rods,Autometer WB,Fesler Pillar Pod,LED strips (int),Lloyds floor & trunk mats,LED DRL/front turn & license plate,DRL harness,VLEDs tail lights,Plasticoat Bowties. Ord: Oct 5, 2009 Rec: Nov 19, 2009 13.17@112.6 stock

03-06-2021, 10:44 AM	#2
Silver14 Drives: 2014 SIM 2SS Join Date: Sep 2015 Location: Charlotte, NC Posts: 925	Check out the diagram on this parts page for the pressure sensor location. https://www.gmpartsdirect.com/oem-pa...Y4LWdhcw%3D%3D

08-09-2021, 08:17 PM	#5
G8One2 Drives: 2014 Camaro 2SS Join Date: Feb 2015 Location: Metro Detroit Posts: 492	Its a sensor, not a switch. The ECM receives the command from the HVAC module to engage the compressor clutch. The ECM is what send the ground signal to energize the A/C clutch relay. If you want to force it to engage, there are ways to do that, but NOT by jumping any wires on the pressure switch.