Cartoon-style Cool Air M.D. social post showing a man pinching his nose as smoke rises from a heater vent with the bold red headline “What’s That Smell From the Heater?” The image is designed for a winter awareness post reminding homeowners that a burning smell from their heater can be normal at first use but may also signal it’s time for a system checkup from Cool Air M.D.

“Should you use vinegar or bleach to clean your AC drain line? See why bleach is stronger, safer, and more effective for killing mold and algae inside your HVAC system.”