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Autumn – Preventive Maintenance:
- Inspect and tighten all electrical connections and terminals
- Remove, clean and adjust main gas burners
- Remove, clean and adjust ignition/pilot assembly
- Inspect heat exchanger(s) and combustion chambers
- Vacuum out blower compartment, return airdrop and surrounding area (no duct cleaning)
- Inspect the flue assembly and test flue gas drafting mechanism
- Test and inspect all furnace safety controls
- Test, record and adjust gas pressure
- Remove and clean blower motor, drive mechanism and fan assembly
- Lubricate all fan motors and moving parts
- Measure and adjust blower for correct airflow
- Clean, level, test and calibrate thermostat
- Measure and record heat system output
- Inspect and test the thermocouple output and the pilot safety switch
- Measure and record electrical voltage, amperage and component OHMS
- Inspect and test all transformers, relays, contactors and controls
- Repair minor air leaks in plenum and return air drop
- Test system start-up capabilities
- Test system for proper air flow and delivery
Spring – Preventive Maintenance:
- Chemically clean and thoroughly wash condenser coil(s)
- Wash and level condensing unit for proper motor and bearing wear
- Lubricate motor and fan bearings as well as other moving parts
- Clean and inspect evaporator coil and drain pan
- Clean and inspect condensate drain lines and fittings
- Clean, level and calibrate thermostat
- Adjust and thoroughly clean blower motor and fan assembly as needed
- Inspect, tighten and test all electrical connections (including disconnect box)
- Inspect all cooling system electrical wires, connectors and terminals
- Test all controls, switches, relays, transformers, contactors, motors and fans
- Measure start and run amps, line voltage and control voltage
- Test system start and run capacitors
- Test and record super-heat and sub-cooling (to compare with factor specifications)
- Adjust refrigerant metering control device per factors and manufacturer’s recommendations
- Test and measure systems for proper production and capacity
- Monitor fan motors and compressor operating temperatures
- Inspect and adjust all safety controls
- Monitor refrigerant pressures and temperatures
- Test system start-up capabilities
- Test system for proper air flow and delivery
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