At Around the Town HVAC, We begin the inspection of your gas furnace with a check of the general condition of the furnace and surrounding area. Some application and install factors which frequently cause problems include the lack of satisfactory combustion air, improperly sized vents, poorly or non-functioning air filters, and electrical shorts due to a water leak in the evaporator coils or humidifier.
Prior to beginning a lengthy troubleshooting process, we check for the obvious. We will note any blown fuses or breakers, loose wires or connections, burned components, or open safty switches and circuits. We check the manufacturer’s instructions, observe the sequence of operation and confirm correct wiring.
The following are basic checks that are implemented during a service call:
- Visually check all electrical components for loose wiring or defective (cracked) wires.
- Make sure electrical power is available at the furnace by checking the circuit breaker position.
- Check the disconnect switch at the furnace to be sure it is on correct position.
- Make sure the blower door is secure. It depresses the interlock switch that permits the furnace to operate.
- If standing-pilot ignition is used, check for a burning pilot light.
- Check the condition of the air filter.
- Check the condition and adjustment of the fan belt (if a belt-driven motor is uesd).
- Check for any accumulation of dust/dirt on the blower motor and blower cage.
- Start furnace operation by placing the thermostat in a heat-demand setting.
- Observe burner start-up and operation.
- Observe fan motor start-up.
- Allow the furnace operating (burning) cycle to run ten minutes. Then, check for airflow through room registers.
- Turn the thermostat to a lower setting to shut off burner operation.
- Check that the burner flames are off and pilot light remains on (if a standing-pilot system is used).
- Listen carefully to determine if blower shuts off shortly after burner flames are extinguished.
- Check exhaust for carbon monoxide level.
When servicing any type or make of heating equipment, We always refer to manufacturer’s manuals for that equipment.
If your furnace has self-test and fault code LED functions, use them. These diagnostic features can save the technician time and guesswork.
If you live in Chicago or the Surrounding Suburbs, Call Around the Town HVAC and Schedule Your Annual furnace Inspection Appointment Today!