• Benting that is rotting away
• Water or gas leaks
• Equipment is un-level
• Incorrect installation

Blower Vestibule

• Cleanliness of blower and vestibule
• Condition of filter
• Wheel balance
• Motor bearings

Combustion Vestibule

• Cleanliness of burners and vestibule
• Inspect burners and orifices
• Pilot assembly, thermocouple, spark igniter, hot surface igniter
• Combustion blower, air safety switches, roll out switches
• Mollenex connectors, wire connections, spade connectors

Cycling of Unit & Testing

• Measure amperage of all motors and hot surface ignition
• Pressure switch measurements of heat exchanger
• Draft readings of venting
• Combustion testing to determine: efficiency, carbon monoxide, carbon dioxide, oxygen, stack temperature, ambient temperature
• Temperature rise across the heat exchanger
• Duct static readings when required

For Hot Water Boilers Add:

• Water fill valve
• Expansion tank
• Auto air vents
• Air cusion tank
• Back check valve
• Purge valves
• Circulators
• Zone valves
• Pump relays
• Aquastat relay
• Low water cut off
• Flue damper

Air Conditioning Maintenance & Inspection

Indoor Equipment

• Air handler blower, blower motor, blower wheel, filter
• Condensate drain
• Refrigerant line insulation
• Temperature ris measurements
• Humidifier bypass damper

Outdoor Equipment

• Visual inspection for level and raised above the ground
• Cleanliness of the condenser coil and flush
• Electrical compartment cleanliness, controls, capacitor, contactor, connections, spade connectors
• Refrigerant temperatures and pressures to determine correct charge
• Condenser delta-t to determine if coil is clear