Evaporator Coil

The evaporator coil is a critical component of your air conditioning system located inside the air handler. It's where the actual cooling of air happens.

How It Works: 1. Warm indoor air flows over the coil 2. Cold refrigerant inside the coil absorbs heat 3. Cooled air continues through ductwork 4. Refrigerant (now warm) flows to outdoor unit 5. Process repeats continuously

Why It "Evaporates": The refrigerant inside the coil evaporates (changes from liquid to gas) as it absorbs heat—hence the name "evaporator coil."

Condensation: As warm air passes over the cold coil, moisture condenses—similar to condensation on a cold glass. This is collected in a drain pan and removed via the condensate drain.

Maintenance:

• Replace air filter regularly (dirty filters damage coils)
• Check condensate drain for clogs
• Professional cleaning every 1-2 years
• Keep indoor humidity controlled

  Common Problems:

• Frozen coil: Caused by low refrigerant, dirty filter, or airflow issues
• Dirty coil: Reduces efficiency, increases energy costs
• Condensate leaks: Clogged drain line

  Signs of Issues:

• Ice on indoor unit
• Water leaks
• Reduced cooling
• Higher humidity indoors
• Strange odors (mold growth)