Tech Tips

Tripping High Pressure Switch
(heating mode)

FI0010

  • 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
    • dirty indoor coil
    • closed supply air registers
    • blocked return grill

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

  • System components not correctly matched
    • indoor coil
    • refrigerant lines
  • Refrigerant overcharge
  • Non-condensables in refrigerant
  • Bad indoor blower motor/bad motor capacitor
  • Refrigerant restriction (high pressure side)
    • Refrigerant lines restricted (vapor or liquid line)
    • Blockage in indoor coil (indoor check valve)
  • Unit not terminating defrost
  • Bad pressure switch