December 14, 2017

Your AC worked fine all summer long, but now your central heating is not working. The last thing you need to worry about during the winter is a malfunctioning heater. While Las Vegas is known for its hot summers, winter temperatures can drop below freezing at night.

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Common Reasons Why Central Heating Is Not Working

If your heater isn’t working, it’s vital to learn what the problem is and fix it fast. You may be able to fix the problem yourself if you can diagnose it or at least reduce the time it takes for a professional to repair it.

Related: Are You Prepared for Winter? Can the Same Thing Be Said of Your Heater?

If your central heating is not working, it’s likely due to one of the following reasons:

No Energy

If your heater won’t turn on, it may have trouble receiving power. This can a relatively simple fix and may only require you to turn the power breaker or gas valve on. However, if this does not work, the problem may be due to faulty wiring or a bad circuit breaker. It’s best to leave repairing hardware issue to a professional since you may expose yourself to high voltages if you try fixing it yourself.


If your heater seems to be moving air but it isn’t reaching every room in your home, your ductwork may have one or more leaks. Your home’s ductwork can become easily damaged, especially during repairs or renovations, or they may simply degrade with age. Try to check them for any unusually warm or drafty spots and make a note of them to show a professional.

Related: How Can I Tell If My Air Ducts Are Leaking?

Malfunctioning Thermostat

Thermostats are sensitive pieces of machinery, and any disturbance to one could affect its functionality. A problem with your thermostat can cause your furnace to behave erratically, constantly turning on and off, or heating rooms unevenly. Check to see if your thermostat is close to a heat source, near a draft, or if it is in too much sunlight. Also make sure that it is level, adequately powers, and is not damaged.

Clogged Ducts

Uneven airflow throughout your home can be caused by a blockage in your home’s ductwork. It’s easy for dust to build up inside your home’s ducts, especially in the cold winter months when most homes have poor ventilation. Clean your vents regularly to prevent dust from interfering with your heater. Blockages can not only reduce its effectiveness but also pose a fire hazard.

Dirty Filters

Changing your home’s filters regularly can improve your indoor air quality and may also keep you from experiencing problems with your central heating. Your home’s filters can collect dust, and if they can get too dirty, they can block the flow of air. Change them regularly to prevent them from affecting your heating. If you have pets or lots of dust and pollen inside your home, you may need to do this more regularly.

Malfunctioning Blower Motor

Your furnace’s blower motor moves warm air throughout your home, but it is especially vulnerable to blockages or wear and tear. If your furnace turns on but doesn’t move air, there may be a problem with the blower motor. Most furnaces will have a small light that indicates the motor is operating normally. If the light is out, the motor may need to be replaced by a professional.

Too Much Condensation

Your furnace will collect condensation from the air circulating throughout your house, and if this builds up, it can cause your furnace to stop working. Check its condensate pan to make sure it is draining properly. If it is not, you may have a blockage in a drain, or if your furnace has a pump, it may be broken. The drain clog will have to be removed, or the furnace’s pump will have to be replaced before it can start working again.

Pilot Light or Igniter Isn’t Working

If you have an oil or gas furnace, it may not be working because it is having trouble igniting its fuel. Check to make sure that your furnace has an adequate supply of fuel and that a draft isn’t preventing it from burning its fuel. Try to turn off your furnace for several minutes, then turn it back on to see if the light is re-ignited. If this does not work, your furnace may have a faulty igniter, which will need to be replaced by a professional.

Related: 3 Reasons Your Water Heater Pilot Light Won’t Stay Lit

Learning about some common reasons with central heating systems can save you money while helping you to avoid a number of hazards. While it may be tempting to repair your furnace on you, doing so could cause more problems than it could solve. There is a that you misidentified the problem, leaving you without heat for even longer, or possibly exposing you to a variety of hazards. A professional HVAC contractor can use the information you give them to quickly identify the problems with your furnace and safely repair them.

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