- May 18, 2007
- Reaction score
- City, State
- Year, Model & Trim Level
- 2002 Limited 4x4 4.6L
- 2002 Ford Explorer 4.6L
- 150K miles
- A/C has never been serviced
- Central Florida - yes, it's still hot here and we run our A/C pretty much 11 months out of the year
- At full blast the a/c system is blowing slight cool air...not cold
Low side pressure begins at 15 psi, it takes 7 seconds to get up to 40 psi then pressure starts to drop when the compressor stops and it takes about 4 seconds for it to drop back down to 15 psi and the process starts over with the compressor kicking on again.
High side pressure is zero. I don't know what to make of it. Is the high side manifold gauge shot? I would think if the pressure was just too low because there isn't enough refrigerant then the low pressure sensor would cut off the compressor altogether...but maybe there's just enough refrigerant for the system to run but I'm confused why the high pressure side would be zero psi...you'd think there'd be some pressure.
Any thoughts on what the issue is before I attempt to add some refrigerant?