Engine Size: 7.3
Refrigerant Type: R134
Ambient Temp: 100
Pressure Low: 40
Pressure High: 220
Country of Origin: United States
With the above pressure readings I'm getting vent temps in the low 60's to upper 50's. vent temps warm up when at idle in traffic. I'm thinking fan clutch, with also a possible stuck blend door. The above reaqdings were taken at idle, windows up and on MAX AIR. I didnt have alot of time today. Didnt get the time to spray some water on the condensor. To me the numbers dont look bad, but I think my vent temps should be lower.
Border line on pressures if you have a full charge. Warm up the engine and have someone turn the vehicle off while watching the fan blades. If they spin for more then a second or two after the motor stops turning I would replace the fan clutch with OEM.
Compressor Type Ford FS-10 10-Cyl.
System Oil Capacity 9.0 ozs.
Refrigerant (R-134a) Capacity 33 ozs.
System Operating Pressures
High Side 128-230 psi (9-16 kg/cm2 )
Low Side 22-45 psi (1.5-3 kg/cm2 )
Would a weak fan clutch show up on a hot day as poor condenser airflow (i.e. mist the condenser with water and see if the high side pressure drops quickly)?
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