VERIFY that your air conditioning gauges DON’T LEAK 

Before you test your air conditioning system with your gauges, do you want to double check to make sure that your gauges don’t have any leaks in them or you won’t know where the leak is coming from your air conditioning system or your gauges. Once you rule out your gauges you know that it’s coming from your air-conditioning system. There’s a few techniques that I have found to work I hope these techniques can help you as well