Typical Startup Instructions for an Electronic Ignition Furnace
The modern high-efficiency gas furnace uses an electronic ignition system instead of a standing pilot to light the gas burners. The ignition device automatically lights the burners. Do not try to light the gas burners manually in these furnaces.
On gas furnaces equipped with electronic ignition systems, there is a sequence of safety steps that must be followed to light the burner. This information is normally attached to the inside of the burner or blower access door. Follow the procedure according to the manufacturer’s guidelines to avoid the risk of fire or explosion. If you have any doubts about the startup procedure, call a qualified technician to start the furnace.
A typical procedure for starting a furnace equipped with an electronic ignition system is offered here simply as a guideline. The steps are as follows:
1. Set the room thermostat to its lowest possible setting.
2. Turn off all electrical power to the furnace.
3. Remove cabinet panel to gain access to the main gas valve.
4. Turn gas valve knob to the OFF position.
Caution
Turn the knob manually. Do not force it, do not use a tool to turn it, and do not attempt to repair it. Doing so may result in a fire or explosion with possible injury or death. If it cannot easily be moved manually, call a qualified HVAC technician for service.
5. Wait 5 minutes for any gas to clear out of the burners and furnace.
Warning
If you smell gas after waiting 5 minutes, immediately call your local gas company (utility) from a telephone outside the house and follow their instructions.
6. If no gas odor has been detected, turn the gas valve knob to the ON position. Do not force the knob.
7. Replace the access panel and restore all electrical power to the furnace.
8. Adjust the thermostat for the desired room temperature setting.
9. Replace the cabinet access panel.
10. Repeat steps 1 through 9 if air needs to be purged from the pilot line.
If the furnace still will not start, shut it off and call a qualified HVAC technician for assistance. The furnace shutoff procedure is as follows:
1. Set the room thermostat to its lowest possible setting.
2. Turn off all electrical power to the furnace.
3. Remove the access panel to the main gas valve.
4. Turn the gas valve knob to the OFF position. Do not force the knob to turn.
5. Replace the access panel.