a/c vacuum question

[Mike Kelly]

I pulled the system down to @29 inches last night for an hour. I watched the vacuum fall from @29 to 25 in about 20 minutes. I vacuumed the system for 30 minutes again this morning and the vacuumed dropped roughly the same amount again within the same time frame. Is this acceptable or do I need to search for another leak. Thanks Mike Kelly

 

[rangerj]

MK,
The slight loss is usually in the equipment. If you had a leak the drop in vacuum would be significantly greater. You are ready for a charge of refrigerant.

 

[Mike Kelly]

Great news. Thank You. Mike Kelly

 

[black93sho]

How do you pull a vacuum on the ac?

 

[rangerj]

Attach a line to the low pressure side and provide suction!

VACUM PUMP.