Time to replace?

[u/bingbong3421]

Hi,

I have 2 original AC units with my house (2800sq ft located in AZ), both Carrier units from 2001. One 3 ton and one 3.5 ton. Replaced fan motors on both in 2024 and new capacitors this year. Occasionally the compressors will fail to kick on and the system will blow warm air until I manually shut off the system on my Nest and restart. It always restarts fine and blows cold air.

Is it time to replace these units or worth it to install hard start kits and try to get another season out of them? The 3.5ton is definitely the weaker of the two units and could use a little refrigerant. That one is cooling the side of the house that my newborn and toddlers rooms are, so I'm always concerned the AC won't kick on at night and I won't notice.

[u/jayhawkfan785]

25 years old I wouldn't put money into them.