Tech Tips

Freezing of Indoor Coil

FI0005

• 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

Note: If indoor air handler is of the (-)BEA, (-)BHA, (-)BHB, (-)BHJ series refer to that model for special installation conditions that may affect air flow

• Low Load
• dirty indoor coil
• return air temperature low
• System components not correctly matched
• indoor coil
• refrigerant lines
• undersized indoor piston
• Bad indoor blower motor/bad motor capacitor
• Unit undercharged
• Unit Operating in Low Ambient Conditions
• Unit extremely overcharged