Furnace Not working: What to Do?

In the United States, gas or electric furnaces are used in more than 80% of houses. While most modern HVAC systems are dependable, they will eventually fail. What should you do if your furnace isn’t producing hot air? Troubleshooting will assist you in determining what is wrong with your furnace and might make the repair procedure go much more smoothly.

Here are a few things to check

Check The Thermostat:

  • Firstly, check the thermostat to ensure it is switched on. Change the thermostat setting from “cool” to “hot.” 
  • Perform furnace troubleshooting and double-check the thermostat to ensure it instructs the furnace to turn on. 
  • Examine the temperature setting. Check that the furnace switch is set to “Heat” rather than “Cool.” 
  • Set the temperature to five degrees higher than the room temperature and observe if the furnace activates.

Thermostat Wiring:

  • Check the thermostat wires back to the furnace for breakage, significantly if you’ve recently remodeled. 
  • If one of the thin wires is broken, patch it back together and wrap it in electrical tape.
  • It would help if you replaced the battery. If there is a power outage and the battery dies, it will lose your settings, and the thermostat will reset to the default program.
  • Open the thermostat and blow away any dust or particles gently. 
  • Check that it is level and securely fastened to the wall and that none of the wires coming into it is loose.

The Furnace isn’t Turning On:

  • Always double-check that the thermostat is turned on and clean the filter.
  • Go to your electrical box; if nothing appears to be incorrect, go to the furnace.
  • Check if the furnace is powered on; open the furnace’s side.
  • Some furnaces feature a reset switch that you might have flipped. 
  • If they do, look into your model and try to reset it. 

Dirty Filters:

  • The need to replace furnace filters regularly cannot be overstated.
  • Clogged filters reduce airflow, causing your furnace to work harder, which can cause the heat exchanger to overheat and cause your unit to shut down.
  • At best, you’ll have an inefficient furnace that produces less heat while costing you more money. 
  • At worst, you’ll shorten the life of your furnace and end up with a cold house. 
  • If your furnace isn’t providing enough heat, or if it’s continuously turning on and off, it’s likely panting for air. Change those filters!

Limit Control Switch Fault:

  • If your blower fan runs continually and you know your thermostat is set to AUTO rather than ON, your limit control switch could be to blame. 
  • This switch, located right beneath the box that transmits heat from the furnace to the ducts, shuts down the system when the air temperature becomes too high.
  • If the unit never locks down, your limit switch needs to be adjusted or replaced, which is a job for an HVAC professional.

If you are looking for furnace repair in Mill Creek, WA  DVAC Heating & Air LLC is here to help. Call now at (425) 403-7859 to schedule an appointment today!

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