This is our basic list for maintenance checks.

• Air Filter Clean
• Inspect Air Filter Housing & Air Seal
• Test Safety Control Operations, Control Sequences & Test Ranges
• Test Thermostat Operation
• Test & Inspect Drain Pan Safety Switches
• Test & Inspect Unit Safety Switch
• Inspect Electrical Disconnect Box
• Check Equipment Grounding
• Measure & Record Line Voltage
• Inspect & Test Contactors & Relays
• Inspect Electrical Connections & Wire
• Inspect All Stand Alone Capacitors
• Measure & Record AMP Draw To Blower
• Motor/Nameplate Data (FLA) As Available
• Blower Motor AMPs
• Blower Motor Volts
• Inspect Fan Belt Tension
• Inspect Belt & Pulleys For Wear & Tear
• Inspect Fan Blade & Blower Wheel
• Connection To Blower Motor Shaft
• Measure & Record Amp Draw On Condensor Fan Motor
• Condenser Fan Motor Amps
• Condenser Fan Motor Volts
• Inspect & Clean Condensate Drain & Traps
• Inspect Drain Pan & Accessible Drain Line For Biological Growth
• Test Condensate Pump
• Inspect Condensate Blowing From Coil Into Cabinet
• Measure & Record TD Across Evaporator Coil
• Record Indoor Coil Entering Temperature
• Record Indoor Leaving Temperature
• Inspect Coil fins Inspect Accessible Refrigerant Lines For Oil Leaks
• Inspect Refrigerant Line Insulation
• Measure Pressure Drop across Coil
• Inspect Indoor Coil And Blower Wheel For Dirt Buildup If Accessible
• Inspect Outdoor Coil For Dirt Buildup
• Record Outdoor Coil Entering Temperature
• Record Outdoor Coil Leaving Temperature
• Record Compressor AMPs
• Record Compressor Volts
• Record Suction PSIG
• Record Discharge PSIG
• Record Superheat
• Heat Pump: Test Reversing Valve
• Heat Pump: Measure & Record System Refrigeration
• Charge In Heating When TD Is Out Of Specifications
• Heat Pump: Test Defrost Cycle
• Heat Pump: Inspect Outdoor Unit
• Condensate Drain Ports

• Air Filter Clean
• Inspect Air Filter Housing & Air Seal
• Test Safety Control Operations, Control Sequences & Test Ranges
• Test Thermostat Operation
• Test & Inspect Drain Pan Safety Switches
• Test & Inspect Unit Safety switch
• Inspect Electrical Disconnect Box
• Check Equipment Grounding
• Measure & Record Line Voltage
• Inspect & Test Contactors & Relays
• Inspect Electrical connections & Wire
• Inspect All Stand Alone Capacitors
• Measure & Record AMP Draw To Blower
• Motor/Nameplate Data (FLA) As Available
• Blower Motor AMPs
• Blower Motor Volts
• Inspect Fan Belt Tension
• Inspect Belt & Pulleys For Wear & Tear
• Inspect Fan Blade & Blower Wheel
• Connection To Blower Motor Shaft
• Test VFD For Poper Operation
• Test Inducer Fan & Blower Assembly
• Inspect & Clean Condensate Drain &
• Traps
• Test Condensate Pump
• Inspect Burner & Flue For Water,
• Corrosion & Blockage
• Test Main Burner Ignition
• Test Burners
• Inspect Heat Exchanger For Signs Of
• Corrosion, Structural Problems Erratic Flame
• Inspect & Record OHM Reading On Hot
• Surface Igniter
• Measure & Record Inlet Gas Pressure
• Test & Inspect Inducer Fan Motor & Blower Assembly
• Inspect Vent Exhaust
• Inspect Vent Connectors
• Inspect Inlet & Exhaust Vent Pipe
• Inspect For Combustible Materials Near Venting Or Pipe
• Inspect Visible Fuel Connections