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Recently had the system on my 2016 F 350 evacuated and refilled due to what I thought was short cycling. No leaks were found. The compressor still cycles too often for me. On a hot day, 90* on max recirc, the cycling begins 10 minutes after start up. It runs 20 seconds on, and about 9 seconds off. The temps decrease and settle in about 42* then as the comp cycles there is about a 1* fluctuation, whereas it fluctuated around 3* as it was cooling down. My tech says the evap sensor is ok, The blend doors are operating at full range, pressures are Ok. I am comparing it to others and just never feel that puff of warm air as the compressor cycles. In my opinion, it cycles too rapidly but I just wanted to see what others have seen before I dump more money into this thing chasing a ghost. Also, I have owned it since new and never really noticed this as I do now.
on an 80* day Low side was 38, and high around 215. Center vent settles at 42* on a 90* day.
Either the low pressure switch or the high pressure safety switch is bad. With those reading the compressor should not be cutting out. Also the low side is a bit high relative to the high side, so there's a small chance the compressor isn't pumping strong enough.
Either the low pressure switch or the high pressure safety switch is bad. With those reading the compressor should not be cutting out. Also the low side is a bit high relative to the high side, so there's a small chance the compressor isn't pumping strong enough.
I did replace the high pressure cut out switch and the ambient temp sensor in the mirror. They were cheap enough so I figured why not. I would need to throw a set of gauges on it to verify those pressures as that was from memory. Now if I set to fresh air, the compressor does not cycle....although the vent temps are a bit higher. Also, when on max recirc, if I open the windows the compressor does not cycle either. So I am guessing the evap temp sensor is cutting the compressor out, but I am questioning how fast the evap reaches temp. on a hot day.
Oh, and no low pressure switch on this one.