Tech Tips

Freezing of Indoor Coil
FI0129

• Low Airflow
• undersized duct, return and/or supply
• improperly installed duct, return and/or supply
• dirty air filter
• air filter with excessive resistance to air flow
• closed supply air registers
• blocked return grill

• Low Load
• dirty indoor coil
• return air temperature low
• Bad indoor blower motor/bad motor capacitor
• Unit Undercharged
• Unit Operating in Low Ambient Conditions
• Unit Extremely Overcharged