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Q: how to empty out the AC compressor lines before running dye to check for leaks?
on 1991 Mazda 929

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Replaced the compressor and added 2 cans of ac/oil last summer and stayed cold the whole summer, didn't used it the winter months, an.d now it doesn't blow cold
(1) Answer
Did you use your defroster during the winter? If so , then you did use the A/C , by default. However, you need the proper shop equipment to recover , vacuum and recharge the system with the dye. Any other diagnostics done , to rule out electrical issues? Like fuse , relay(s) or control panel?