3 Reasons Your Furnace Isn’t Blowing Warm Air

There’s nothing worse than getting home after an exhausting day at work, only to realize your heating system has abruptly decided to stop doing its job for no apparent reason. Luckily for you, this problem can usually be solved without the need for a new furnace installation in Cherry Hill. 

In previous articles, we provided you with a list of common furnace issues and listed the average lifespans of different types of furnaces. Now we’ll discuss the 3 reasons why a furnace may refuse to turn on or fail to produce hot air. Keep reading to learn more. 

Why is my furnace running but no heat?

Even if your furnace appears to be running properly, it may still fail to produce or distribute warm air. This can be caused by a variety of different problems, some more serious than others. 

Here are 3 common reasons why your heating won’t turn on:

1. Improper maintenance

HVAC systems require regular maintenance in order to be able to operate properly. Heating systems that aren’t annually serviced by registered technicians will inevitably start acting up as a result of dirt buildup or other untreated problems. 

Issues associated with a lack of maintenance include:

  • Clogged air filters restrict airflow and may damage the ductwork
  • Dirty burners make the furnace less efficient and may even stop it from operating
  • Grimy flame sensor may prevent the furnace from turning on
  • Dirty blower motor can lead to component failure

2. Thermostat problems

Sometimes, your furnace may be blowing cold air through no fault of its own. Rather, the thermostat may be sending the wrong signals to the rest of the HVAC system.

Thermostat-related issues include:

  • If your fan is set to “on”, the HVAC system will blow cold air during furnace downtime. Always set your fan to “auto“.
  • Someone may have set the thermostat to a temperature that’s uncomfortable for you. This often happens in crowded offices or large households.
  • The battery in your thermostat may be running low, which prevents the thermostat from sending the right signals to the furnace.
  • The thermostat may be improperly installed. That’s why it’s important to always have your HVAC equipment installed by trusted technicians.

3. Gas problems 

If you’ve had any repairs done on your furnace recently, there’s a good chance that the gas supply valve is shut off. If the valve is off, your furnace won’t have anything to burn in order to produce heat. Here’s how you can turn it back on: 

  • Locate the gas valve on your furnace 
  • Make sure that the valve handle is parallel to the gas pipe 
  • If the valve is off, the handle will be perpendicular to the gas pipe
  • If the issue isn’t fixed and you can smell gas, turn off the supply and call experts immediately. Gas leaks can be incredibly dangerous

How do you fix a gas furnace that produces no heat?

How do you fix a gas furnace that produces no heat

If your furnace isn’t producing heat like it’s supposed to, despite receiving regular maintenance, having a functioning thermostat, being properly calibrated, and not being at the end of its life, you may have a serious malfunction on your hands. 

If this is the case, you should get in touch with a reputable HVAC contractor and refrain from using your heating system until the experts have examined it. For best results, always choose a HVAC team that takes a whole-house approach to pinpoint the source of your problem and propose solutions as to how to make your heating system function properly and more efficient. 

Who should I call when I need first-rate furnace installation in Cherry Hill?

Here at Allied Experts, we want to use our extensive experience and training in HVAC repair, maintenance, and installation to keep your heating system operating flawlessly all year round. As the premier HVAC contractor in Cherry Hill, we are uniquely equipped to attend to all your HVAC-related needs. Our technicians will happily make sure your HVAC system works perfectly while you and your loved ones spend a relaxing afternoon at the Chapel Avenue park. Get in touch with us today.

Allied is the Leading

Home Performance With Enery Star

Contractor in the country

Schedule an appointment

In the U.S., 50% of all Heating and Cooling systems installed are sized incorrectly.

Cta Workers

Join the allied newsletter

Sign up to stay updated on exclusive offers and information specifically for our newsletter recipients

We only email you with our best offers, no spam ever.

Discover More HVAC Tips

4 Types of Duct Insulation for Your Home

It’s impossible to overstate the importance of air ducts in any HVAC system. The health of your family, indoor air quality, and the lifespan of your HVAC system depend…

Top 3 Signs Your Furnace Needs Proper Maintenance

As a general rule, the average furnace should be properly serviced at least once a year. This will not only maintain the efficiency and longevity of your HVAC system,…

Top Dangers of Dirty Air Ducts

The Potential Hazards Lurking In Your Air Ducts The air ducts within your home quietly facilitate the circulation of air that sustains your comfort. However, inside this hidden network…

Cta Workers


Contact us online to
schedule your service today!

Please fill out this form and we will get back to you as soon as possible.

Cta Workers