Whether you have an older furnace with a standing pilot light or a newer one with an electronic intermittent pilot or hot surface ignition, there are a variety of reasons why the furnace won’t turn on. You can do some simple troubleshooting to check the main circuit breaker and the thermostat. It may just be that a blown fuse needs to be replaced or that the breaker needs to be flipped. Do a check of the thermostat to make sure it is on and on the right settings. It may be that the thermostat isn’t calling for any heat.
Other Reasons Why a Furnace Won’t Turn On
If you have an older furnace, check the pilot light. A standing pilot light should be visible in the combustion chamber door. If it’s out, just re-light it and be sure the gas valve is off is turned off. Further, let the air clear for a few minutes. It can also be that the fan motor inside the furnace isn’t working making you think that the furnace isn’t operating because there is no heat. Other possible causes for why a furnace won’t ignite include malfunctioning thermocouplers and flame sensors, dirty ignition parts or air in the supply gas line. You may need a qualified HVAC technicians to diagnose and repair the problem.
The more modern furnaces with intermittent pilot systems and hot surface ignition systems are more technologically advanced and often difficult for a homeowner to diagnose the problem. For the quickest and easiest diagnosis and repair, call one of our professionals at Gartner.
In these modern systems, the intermittent pilot systems use a high voltage electrical spark to ignite the gas pilot and main burners. If the furnace doesn’t ignite when the thermostat calls for heat, it may be due to a faulty control module, faulty pilot burner, damaged spark electrode or loose connections to the control module.
The hot surface ignition system uses an electronic heating element to ignite the gas burner. When this type of ignition system fails to ignite, it is likely that some parts may be to be replaced. With power and gas off, you can take out the flame sensor and wipe it down with cloth. It just may be dirty. You can also take out the igniter and inspect for cracks or damage. If you see any, the igniter will have to be replaced.
HVAC Services with Gartner HVAC in Skokie IL
At Gartner HVAC, we offer a wide range of HVAC services, including furnace and boiler repairs, installation of new HVAC systems and preventive maintenance plans. Our NATE-certified technicians have the knowledge, skills and tools to get the job done right. All of our work is guaranteed. To save our customers money, we offer discounts on HVAC repairs and financing plans with preferred interest. If you need a repair or a new HVAC system, be sure to call us.