I'm with you on that but so far it's always had good air flow. Temp was probably only in the 70s when we charged the system and measured the low 30s temp. I'll measure the temp of the air on a hot, humid day when the output is not as cold as it should be. Its going to about 90* tomorrow. I HOPE the system is still working well at that temp.
Right, no low pressure switch on the Mav. So, with no low pressure switch will low frefrigerant cause the compressor to cycle (hot humid day, AC set on Max, TEMP set on Cold, Fan set on Hi) while the system is blowing air that isn't very cold? Should I try adding 2 or 4 oz of refrigerant?
If it's too low on a charge, it can be real cold like that, until it freezes the evaporator over, stopping the air from flowing through it. Then you have to cut the compressor off to let the evaporator thaw out to resume airflow through it. You can tell if that's happening by the air temps starting to rise, you shut off the AC and the air temps will get cooler once again as the evaporator thaws out. The force of air out the vents will also increase as the evap thaws out. I've always used as much 134A in a system as R12 was required in it before. Some will say to use less 134A, but its always worked better for me to use about what R12 was called for, usually 3 12oz cans plus a 8 oz oil+134A mix can.
As much as I know about Mavericks, I really haven't dug too deep in the a/c on them...yet....they do have a evaporator temperature sensor, which would do the same thing as a low pressure switch.
I installed a...trinary switch...in my system...it has a low/high shutoff and a...fan on... when compressor is engaged...
Works fine at 90* Gave the AC system a good test today at about 90*. I'll guess the humidity at atout 60%-70%. Worked fine -- nice cold air and no cycling with ac on "Max" and blower on "Hi". Will try it when the temp gets to the high 90s and see how it does. If it cycles and doesn't blow COLD air, think I'll pick a good hot day and get my buddy to add some $134A and see it it helps. Thanks everyone for all the hellp, Jim
Vry interesting subject. I have'nt run mine on Hi-Max enough to tell whether the thing is cycling in that mode. I usually run it on Hi until it gets comfy and then Med is usually enough to satisfy me. Im going to run it in the HI-Max mode to see if it cycles. It's suppose to be in the mid to upper 90's today - this may be the day to do it.
" Max " setting on mine does 2 things. It closes the fresh air door to make the air recirculate, and it turns the heater hose valve to " Off " position. When it's real humid, the system works better on the max setting.
