Ricky Beals

Totally off topic but you guys will probably know. I noticed a small drop of coolant coming from that sight glass on radiator. I have the two piece where top is radiator and bottom is reservoir. This something that goes out regularly. Do people go back with original thimble type glass bulb?

No sir I haven’t. I’m guessing that’s a problem for these. So basically that’s where the evaporator core is at?

I just bought the truck and the guy that had it before me replaced the compressor and dryer. Ac wasn’t cooling good and we discovered the expansion valve was bad. We flushed the system and while waiting on expansion valve and thought we would replace the pressure switches just to be safe. I now understand the switch on dryer is binar.  I didn’t know if the fan switch ( green colored switch) was bad to go out. Sometimes it easier to replace them now than later I reckon.

We changed out the dryer, compressor and expansion valve and figured we would change them out. Parts guy kept saying it only had one pressure switch so I set to try and figure it out. Joined this forum and figured someone knew. I sure appreciate your help jojo.

Do most folks change them out or is it waste of money? They ain’t bad but figured it was best thing to do.

New member here and first post. I have. 2003 Mack Ch 613 day cab. On the dryer for the AC there is a pressure switch and below it on a line is a green colored plug that has a schrader valve behind it. Any ideal what this plug is. Hopefully the picture loads