Tenant running AC at 61F outside temperature

[Peter Morgan]

Hello,

The weather outside my rental unit is 61F and my tenant has already started running his centralized AC perhaps he thinks we have already hit the summer. Is this normal? I am bit worried there may be adverse effects to the AC unit when running it while the outside temperatures are below 65F. How can I politely convey not to use AC when the whether outside is well under 65. Appreciate your inputs.

Thanks