Going to vac my system down. Will be changing the filter/dryer. On my older Chevy systems it is often necessary to jump the low side pressure switch to get the correct amount of refrigerant into the system. Is there a similar process on the crossfire? Where is the switch?

thanks.

I was going to also replace the expansion valve, but I’m hoping it was just iced up last I tried as it seems like a pita to get to.

 

Update. As usual I was over thinking this! Just hooked up the gauge set. Had 30psi on low side. Didn’t hook up high side until later(have to remove the grill). Clutch was not engaged (low side switch). Hooked up a 12oz can of 134a. After a minute the clutch engaged. Took all 12oz ended up with 54/225 psi and 60 degrees out of the vents. . The high side plastic cap did break off so I’ll have to replace it and dig the nub out of the fitting.

 

Glad you found a solution, but it must be coming out somewhere?

 

Still had 30psi low side. It is 20 years old.

 

Hello X-fire family, I am have an AC issue. On really hot days, it blows hot air. Late in the evening when the temperature is much lower, it works sometimes. Any suggestions as to whether I should recharge it or something else

 

First, replace #15 in the engine fuse box.
Next check for voltage at the duo valve on the black connector. Center connector should have constant voltage. side pins should have pulsing voltage.

 

Thanks so much for the advice. I believe we have two different models. I have a 2004 base model. My manual has some slight differences. For example, my #15 Engine Compartment Fuse is for Auxiliary Water Pump. I don't have "Residual Heat ... However, the fuse is 5 amps. See attached.

 

I've used the attached procedure to restore the normal operation of the HVAC system in my 2007 Coupe. Since you've reported that your system works intermittently, good possibility this simple PM procedure might restore normal operation by just flushing the Duo Valve of any build-up from the cooling system. Worked for me.

Good Luck,

 

Sorry about that. I have a 2006 base model with a manual transmission.

 

Yes, all Crossfires are not the same when it comes to fuses. Originally there was a chart included in the fuse box.