Spring: get ready for cooling
- Replace filters and clean the condenser and evaporator coils
- Check refrigerant pressures and compressor amperage
- Clear the condensate drains and traps
- Inspect belts, pulleys and bearings on supply and exhaust fans
- Test economizer dampers and controls
Fall: get ready for heating
- Inspect the heat exchanger and burners, and test the ignition and safeties
- Check the gas pressure and the flue
- Replace filters and belts that will not last the winter
- Test make-up air units before the first cold week
Exhaust fans are not optional
Kitchen, washroom and garage exhaust fans protect air quality and, in a parking garage, safety. A seized fan often goes unnoticed for weeks. Each visit should include belt tension, motor amperage, bearing condition and, for garages, a test of the carbon monoxide detection that starts the fans.
What to keep on file
A log for each unit: model, serial number, filter sizes, belt sizes and the readings from every visit. It shortens every future repair and gives you the facts when it is time to budget a replacement.
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