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What we do on a routine maintenance call
— by Oshkosh Heating and Air Oshkosh Heating and Air
Gas Furnace - 16 point Winter Tune-Up

1.   Evaluate condition of filters, replace with filter supplied by client.
2.   Clean Flame Sensor.
3.   Clean and Inspect Burners.
4.   Inspect Heat Exchanger for rust, cracks, and corrosion.
5.   Clean and adjust thermostat in furnace
6.   Clean and inspect Blower motor, Wheel, and Housing.
7.   Clean and Inspect Draft Inducer Motor, Wheel, and Housing.
8.   Test and adjust safety and operating controls, pressure switches and relays.
9.   Clean and adjust pilot (ignition) assembly.
10. Inspect flue pipe and draft assembly (the PVC piping for venting carbon monoxide).
11. Test and tighten all wiring connections.
12. Test gas valve operation, adjust gas pressure if necessary.
13. Re-inspect heat exchanger for cracks or holes (with probe).
14. Adjust burner for maximum efficiency.
15. Test temperature rise.
16. Carbon monoxide test.
17. Check thermostat and confirm proper operation.
18. Clean up area to customer satisfaction.
Boiler – 18 point Tune-up

1.   Visual inspection of unit. Check wear and tear, loose parts, etc.
2.   Check thermostat and make adjustments where necessary
3.   Test flue damper operation
4.   Check/adjust temp and pressure settings
5.   Test safety controls
6.   Remove rust and soot and clean and adjust burners and exchanger
7.   Clean and adjust ignition assembly or OHM igniter
8.   Check micro amp signal from flame sensor
9.   Adjust gas/air mixture for optimum efficiency
10. Lubricate motor bearings
11. Clean condensate trap if high efficiency boiler
12. Check Carbon Monoxide (CO) level of exhaust
13. Check and tighten all exhaust pipe connections
14. Check all gas connections located in unit
15. Adjust gas/pilot pressure
16. Inspect and clean heat exchanger thoroughly
17. Check electrical wiring and tighten all electrical connections
18. Cycle unit and make adjustments accordingly

Air Conditioner Maintenance - 30 point Summer Tune-Up
1.   Check operation of furnace and air conditioner.
2.   Check and clean thermostat. Calibrate thermostat (if necessary).
3.   Perform a visual inspection of the indoor unit.  Look for rust, dirt, loose panels, and advise the customer about any flammable
materials being stored near unit.
4.   Shut down the humidifier for summer (if applicable).
5.   Check the blower assembly.  Look for rust or filings from wear, make sure the wires are in good shape and properly attached, and ensure that the entire assembly is secured tight.
6.   Check and clean the motors and fan (oil as necessary).
7.   Check the evaporator coil.  Look for oil stains, rust, or debris in the pan, and check the fin condition.
8.   Record the unit's total static pressure.
9.   Check and flush the condensate line.
10.  Check the condensate pump (if applicable).
11.  Perform a visual inspection of the outdoor unit.  Clear out debris, leaves, and rodents.  Make sure that the panels are secure, check for rust or deterioration, replace missing screws.
12.  Check the outdoor disconnect box.  Look for burnt wires or connections, bees, bugs, nests, and rust.
13.  Check the condenser coil and spray clean with special cleaning solution.  Rinse with water to remove last of dirt and debris.
14.  Check refrigerant connections. Look for oil stains, or kinks in the lines.  Make sure the caps are in good condition.
15.  Inspect all wiring and controls for wear and tightness.
16.  Check and inspect the compressor contactor.
17.  Check relays.  Are they functioning? Are there any indications of burnt connectors, bulging, or distortion?
18.  Check the compressor.
19.  Check the capacitors.
20.  Check the start assist device (if applicable).
21.  Check the pressure switches (test).
22.  Check the time delay relay.
23.  Check the circuit boards.
24.  Check the fan blades for cracks.
25.  Clean the outdoor unit with solution. Rinse with water.
26.  Check the voltage or amp draw.
27.  Check the operating pressures, superheat, and subcooling.
28.  Check the temperature drop across the evaporator coil.
29.  Check the operation sequence.
30.  Clean up area to customer satisfaction.