Junkyard
Senior Member
I thought I knew a little about A/C stuff. I don't know jack! Wow
BTW, the current dryer has a sight glass, and it is clear. Too clear. In all previous systems I've worked on, I've always seen at least some bubbles in the glass. This one stays clear all the time.
I will most definitely post when I get it sorted out. I have decided to dig into the evaporator housing and make sure the coil doesn't have any sort of restriction on part of it. I have a new expansion valve and dryer, so if the evap and ductwork are clean, there really isn't much else to consider.Something I thought about while driving around. One reason the high side goes high when first compressing is that the compressor is (probably) a fixed displacement unit. Meaning the more pressure you give it on the inlet side the more refrigerant it is pumping per stroke. Then as the low side pulls down, the compressor is more "starved" for refrigerant and there is less being moved from low to high for a given RPM and the high side pressure begins to drop. There are a lot of variables in this concept but that is the general idea.
I hope to learn how this actual project turns out when the OP gets it fixed.
With all due respect, the TXV will happily freeze an evaporator into a solid block of ice. Its purpose is to control superheat, not temperature.
As you said ".....superheat is the number of degrees above the boiling point that the outlet gas coming out of the evaporator is at."
"Superheat" is in fact 'temperature' which is in fact 'pressure' (in a sealed environment) which is what operates the expansion valve.
I was not implying the expansion valve would 'prevent' freezing only 'attempt' to prevent it as a 'part' of the 'function' of the valve. That was the point I was trying to get across to someone working on an AC. An AC with a slightly low freon charge most definitely will freeze solid, as I stated.
Once again I am only trying to simply the operation of a basic AC and relating the operation to HOT and COLD. If you understand the HOT/COLD aspects many basic AC problems can be diagnosed by simply checking the temperature at different points in the unit. (condenser/evaporator/compressor)
Thanks for the offer, but I looked up a B with the online parts manual, and the systems are completely different. I just wish these dip***t engineers would not assume that everything will live forever, and figure out how to allow service without removing EVERYTHING.Will the manual for a cx210B help you?