If quick assistance is needed with purchasing a tool or part, please visit our tool website DenLorsTools. I get nothing but hot air. Gauge reads in correct zone. Necessary cookies are absolutely essential for the website to function properly. Like other reviews, the gauge completely inaccurate and I ac manifold gauge set walmart out the system. Ambient temp was 87 degrees F.

A buddy of mine mentioned that we have to vacuum both the high and low pressure ports. Answer — First, for the benefit of others reading this and our Ozone PLEASE have refrigerant recovered properly so it can be recycled instead of being released into our atmosphere when opening up a system for service.

The system may not need to be opened to make some repairs. Sometimes the problem could just be electrical, so a second opinion may be worth a trip to the shop anyway. Anthony, g is only 3. But lets back up. You asked about applying vacuum to both low and high sides.

The AC manifold gauge set would be hooked to both service ports before hooking up the yellow hose and applying vacuum. However, using the vacuum pump improperly, would not be the cause of the Freon not going in. Ever wonder how shops can put refrigerant in without the car running?

After you add some refrigerant, like you did, the pressure will be enough for the compressor to start to come on. The suction low side will start to draw the refrigerant in. Seems to me the main problem with your car was electrical to begin with. I would check to the low pressure switch and the compressor clutch coil.

There could be many other possible failures but these are the things I would start with. The original problem you had still exists. The compressor is not coming on. After the electrical issue is resolved the system will capable of accepting a charge with the compressor operating normally. Good Luck. Date: September 12, pm. I have also heard that a highside elay could be bad which keeps the compressor from starting,which is my problem.

Date: September 13, am. Sounds like over-charged. Might just have been this unit but I over charged the system and it shut down completely. If you charge with this unit alone, make sure you also monitor the air temp inside the car which should be between 40 and 45 degrees F depending on the ambient temp. I had to vacuum out the entire system and recharge it with a set of manifold gauges that I bought to do it right.

Ambient temp was 87 degrees F. I set the gauge and turned the AC on max with max fan speed as instructed. Next hooked the line up to the low side service port. Gauge was reading low so I next proceeded to inject refrigerant per the instructions. The gauge reading did not fluctuate that much from what it was originally and I ended up putting the whole can in at which point the AC was not blowing cold any longer indicating I had overfilled the system.

Never had a problem. I charged my Crown Vic with this 3 days ago, and the compressor suddenly seized up today. Likely cause is overcharging, however I was very careful to keep the charge levels in the green and not tip the can.

The only conclusion I can reach is that the gauge itself was not accuratem or the oil was incompatible. Thanks for costing me a thousand bucks. Testimonials are verbatim as found on retailer websites.

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