A/C Pressure Switch

[PonchoCatalina]

The air conditioner on my Suburban just started acting up, and the problem seems to be the low pressure cutoff switch (the compressor clutch engages when jumpered and low-side pressure looks fine with a gauge). Can I just unscrew the switch from the accumulator and replace it, or do I have to evacuate the system first? I didn't want to unscrew the switch and discover a high pressure jet of freon hiding behind it. Thanks.

 

[HarryH3]

You can just unscrew it. There's a Shrader valve in the fitting that prevents massive freon escape.

 

[cbbr]

You can just unscrew it. There's a Shrader valve in the fitting that prevents massive freon escape.

Exactly, just be sure not to torque it down too much - its plastic and will break. Ask me how I learned this.

 

[sandawgk5]

HIJACK where did you find the replacement switch I have done a few searches and can not find anything.

 

[cbbr]

Napa. It was about $12.00.

 

[sandawgk5]

Thanks end hijack

 

[cbbr]

I also got one at Carquest. It is Murray PN 35751. I don't have the NAPA PN.