Preventative Maintenance

20 point Preventative Tune-up Procedures:

• Clean and check condensing coil

• Inspect heat exchanger

• Test operating pressures

• Test starting capabilities

• Test & adjust blower components

• Test & check safety controls

• Clean filters

• Clean condensate drain

• Test voltage of motors

• Test AMP draws on motors

• Lubricate necessary moving parts

• Calibrate thermostat

• Check for proper air flow

• Measure temperature difference

• Check expansion valve

• Clean evaporator coil, if accessible

• Test in heat cycle

• Test reversing valve operation

• Test safety controls

• Test defrost operation

When you should clean your air ducts ?

• If you have a problem with water in your ducts, this may result in mold growth in the duct. In this situation, solve the water problem first, clean and disinfect the ducts where mold growth has occurred, and have the rest of the ducting system cleaned as well.

• If you are moving into a newly constructed house, and have doubts about the diligence of the construction crew, duct cleaning can be useful. Drywall dust, fibreglass pieces, and sawdust have no place in ducts. Duct cleaning will also catch the odd occurrence where lunch bags or soft drink cans have fallen or been swept into ducting. For similar reasons, duct cleaning may be advisable for older houses following major renovations.

• If you are having trouble with furnace airflow, a duct cleaning could reveal significant blockages. Have the ducts cleaned before you embark on more expensive duct replacement or rerouting to solve an airflow problem. Cleaning of furnace and air conditioning components (e.g. furnace fan blower, air conditioning coil, humidifier, furnace heat exchanger, etc.) has been shown to make some difference in duct air flow.

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