A/C issues

[Truckin2003]

well using the A/C for this year is over but i had a problem that i wanted to see if anybody else has encountered. In my 2003 2500HD while using the A/C the air would be ice cold then all of the sudden it would start blowing mildly warm air then a little bit later it would start blowing ice cold again. If i had to guess i would say that there is a sensor bad or maybe the switch panel is going bad.

 

any suggestions? anybody else ever seen this?

 

Thanks,

 

Pat

[GM-Tech]

Possibly the low pressure cycling switch. This is the two wire pressure sensor mounted on the accumulator... the big aluminum can near the firewall.