It needs pressure taken - both high and low with observations of the ambient temp. Ambient is temp directly in front of the condenser at grille.
Compressor may be panting away and you don't know what the heck it's trying to do without the pressures.
If compressor cycles on and off it may be normal or abnormal based on the pressure readings. Cycling happens when pressures are too low OR too high. Even a diverter door will show with erratic pressures. If you don't want to take pressures then post infrared thermo temps along the lines from the compressor and all along the lines to and from the evaporator and I can calculate the pressures.
System could be freezing up and disallowing air flow, diverter door erratic and would show it. If no condensate is noted under vehicle with any reasonable humidity and higher temps (above 70-80ishF) then there is an issue to address.
It's not quite that simple and the pressures are a must to continue or farm it out as that will save you possible expensive problems that could be avoided if timely.
T
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Tom Greenleaf - MetroWest, Boston
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