Unit blows air but there is a noticeable chemical or refrigerant-like smell.

Safety first: If you suspect a strong refrigerant leak (sweet or ether-like odor, hissing), turn off the system and ventilate the area.

Steps:

• Inspect for oil: Look around the indoor coil and line set connections for oily residue, which can indicate a leak.
• Eliminate external sources: Remove or seal chemicals (paints, solvents, cleaners) stored near the indoor unit.
• Clean coil and pan: Perform a thorough cleaning of the evaporator coil and drain pan with coil cleaner.

If odor persists or leak suspected: Contact a licensed HVAC technician to perform a leak check and repair. Do not attempt to recharge refrigerant yourself.