Replace A/C Unit just for Efficiency

[Brett Robinson]

Hello BP community.

I have 3 rental properties in the same boat. They all have older A/C units. I would estimate over 15 years old. I am paying utilities on all my properties because I generally do short term rentals.

My question is do you suggest waiting till they die completely, getting them serviced and "touched up" by a company or to actually start replacing them one at a time (or all three if I get a deal)

Thanks for any input!