1965 Posted June 8, 2020 Share Posted June 8, 2020 (edited) Low side switch should kick compressor out when it gets too low. Never watched an evaporator while charging or working so don’t know about the ice. Along as fan blowing air and clean, don’t know. if you have all your panels off around your evaporator while trying to charge, that’s not going to work, got to be closed up for it to read right. I should’ve just stayed quiet, maybe someone with the right knowledge will jump in. Good luck Edited June 8, 2020 by 1965 Quote Link to comment https://www.bigmacktrucks.com/topic/40532-ch613-ac-what-ac/page/2/#findComment-452908 Share on other sites More sharing options...
Superhogult Posted June 8, 2020 Share Posted June 8, 2020 The complaint was ac system inop. I could see the compressor engagefor a split second. I found the system wave very overcharged. I pulled 6 pounds out and the system calls for 3 pounds. I put three pounds back in after a 10 minute vacuum with a leak test for another 10 minutes. The low side would drop to 5 pounds and shut off the compressor. The high side was around 250-275 and engaged the fan at 300. I thought the expansion valve was sticking and not allowing refrigerant to pass as should. The dryer looked old so I replaced it at the same time as a service. Now the low side is a little higher “10-15 psi” but still to low. The temp out off the vents read 58-60 degrees. Quote Link to comment https://www.bigmacktrucks.com/topic/40532-ch613-ac-what-ac/page/2/#findComment-452912 Share on other sites More sharing options...
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