Broken Furnace | Reasons Your Furnace Won’t Turn On

Broken Furnace | A Few Reasons Why Your Furnace Won't Turn On

The furnace is one of the most important features in any home. When you live in an area that experiences the changing of the seasons, you need the indoor temperature of your home to be properly regulated and comfortable throughout the year. This is why maintaining, repairing and replacing your heating, ventilating and air conditioning or HVAC system at home is a task that must be regularly completed.Unfortunately, just like any mechanism, the components of your HVAC system can fail to perform as you expect them to from time to time. This is what regular maintenance is meant to prevent because the last thing you want is for your family to wake up to an especially frosty winter morning and discover that the furnace refuses to turn on.The best thing to do in such a scenario is to call in the professionals to identify the problem and perform the necessary repairs or replacements to get the furnace working in top form. However, you can also make a few simple inspections to try and determine the root of the problem before the HVAC specialists arrive.

What are the reasons your furnace won't turn on?

The Power Source of the Furnace is Turned Off 

Furnaces — even the ones that run on gas — use electricity, so homeowners are sure to find a power disconnect switch by the furnace. You can check if this power switch is turned on. You can also check to see if the breaker at the electrical panel has been tripped.

The Ignitor or Sensor is Faulty or May have Become too Dirty

Typically, the thermostat tells the furnace's ignitor to click on; the ignitor will then begin to grow hotter, ignite the gas, and blow hot air. However, you might observe that even if the furnace's pilot light is on, it does not fire up. This means that you have a dirty or broken ignitor which could be causing your broken furnace. Except for furnaces with electronic ignitions which don't have a pilot light. 

The Gas Supply to the Furnace is Closed

The gas control valve to the furnace has to be open to ensure that the heating system is consistently supplied with the fuel it needs. Take note that if the furnace is not turning on and you smell gas, vacate your home immediately. After you vacate your home, call your trusted HVAC company and inform them that you require emergency services.

The Thermostat Settings are Incorrect

This is what the settings should be like:
  • The temperature control selector is set above the present temperature in the room
  • The furnace system switch is on HEAT or AUTO
  • The fan should be ON to ensure continued airflow

The Furnace Filter is Dirty

Finally, the flow of hot air from your furnace might be blocked by a dirty air filter. Any obstructions to the registers will prevent the heat from flowing throughout your home.Do you have a broken furnace? Contact the furnace repair specialists in Walnut Creek at Hometown HVAC.
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