The AIM Act changed a required substance for HVAC companies nationwide. The problem? They can't get ahold of it, and it's ...

HVAC companies are handling service calls and a shortage of federally required refrigerant. advertisement. Lansing WILX-TV. Refrigerant shortages cause HVAC costs to rise ahead of summer.

The AIM Act went into effect on Jan. 1. The Environmental Protection Agency said the new mandated refrigerant is better for the environment.