When the weather is chilly in Newburgh, and your furnace is running just fine, but the air coming out of its vents feels cold, that’s a major cause for concern. Several reasons can be the cause of this, but luckily, you can solve some of them before calling a professional. This is something that can occur even when your furnace is fairly new, and you should know when to bring in the experts. Here is a guide on the reasons why your furnace might be blowing cold air.

1. Improper Thermostat Setting

One of the first things that you should check when you sense cold air blowing from your furnace is the thermostat. It should be set to “Auto.” If the thermostat is set to “On” and not “Auto,” then your fan will continuously run without producing any heat. The “Auto” setting ensures your fan only runs during the regular heating process.

2. Empty Oil Tank

If your furnace operates on oil, you might have just run out of fuel. The blower will keep circulating cold air even when the burners are not lit up to produce heat.

3. Issues With Computerized Controls

Some newer furnaces have an electronic control panel that will need to be restarted to reset the system. Using the power switch, simply turn off the furnace, wait for some minutes and then turn it back on. If the rebooting doesn’t solve the issue, you need to contact the technicians from Polar Plumbing, Heating & Air Conditioning.

4. Overheated Furnace

When the furnace overheats, the burners shut down. One of the main reasons for overheating is the failure to change the air filters. Clogged air filters compromise the air circulation, leading to overheating of the furnace. Change the filters and restart your furnace to see if the problem will go away. If not, you require professional assistance. The problem is likely a mechanical failure.

5. Extinguished Pilot Light

Some furnaces, especially older ones, might have a constant pilot light issue. It may have gone out due to a gust of air from someone working nearby. If you are confident in relighting it, then do so following the instructions in the user’s manual. If it goes out again after a while, then there is probably a more complicated issue that requires professional expertise.

6. Valve Problem

If the pilot light is not lighting up, you might have a faulty gas valve. Check if it is on. If so, then it could be dirty, so clean it up to clear dirt and debris for proper flow of gas. Also, clean the pilot light while you’re at it.

7. Faulty Thermocouple

The issue of a continuously extinguishing pilot light can also be caused by a faulty thermocouple. This is the sensor that controls the ignition and the gas valve. Although this is normally a simple repair, it will require you to call our Newburgh team to either adjust or replace the device.

8. Clogged Oil Filter

The filter of an oil-fired furnace, just like the air filter of a gas-fired system, can get clogged by dirt and debris. When this happens, the ignition could be affected. Consequently, there will be no heating. Although you can replace or clean the filter yourself, the process can be quite messy. You can call us, and we will fix the issue promptly.

9. Faulty Electronic Ignition

Newer furnaces have electronic ignitions that might need to be adjusted or replaced if the part is faulty. Systems with hot-surface ignition or intermittent pilot require the attention of HVAC technicians like us who know how to handle the issue.

10. Compromised Flame Sensor

Your system might blow warm air when you turn it on and then suddenly turn cold. A furnace flame sensor that is worn out or covered with grime could be the reason behind this. The flame sensor will keep shutting off unless you call in HVAC professionals to come and repair your furnace.

11. Dirty Oil or Gas Burner

The gas or oil burner is bound to get dirty as it will accumulate grime and dust if neglected. When this happens, it will have trouble igniting, and there will be cold air blowing from your system. Your system requires being professionally cleaned to solve this problem.

12. Air Filter Issue

Air filters get dirty with time from accumulating dirt from the indoor air circulation. When they get dirty, they restrict airflow into your furnace, causing it to run longer and harder while attempting to provide adequate heat. This will cause the furnace to overheat, and a limit switch will automatically shut off the burners to cool it and prevent possible damage. Change your air filters regularly because if you don’t, the frequent overheating might lead to the costly replacement of a damaged heat exchanger.

13. Inadequate Gas Supply

Sometimes your furnace might automatically lock itself down for safety reasons when it is getting an insufficient amount of gas required to warm the air. This may be the result of a severed line. In such a scenario, you need the help of our Newburgh technicians to handle the issue professionally.

14. Clogged Condensate Drain Lines

New models of high-efficiency furnaces are equipped with condensate drain lines. The purpose of condensate drain lines is to drain water created in the furnace during the heating process. When these drain lines are clogged, they almost always trigger a switch that is meant to prevent the lighting up of burners. The result is cold air coming from your furnace. If clogged, these lines need to be professionally cleaned.

15. Leaking/Damaged Air Ducts

The cause of cold air coming from your furnace could be the result of hot air exiting through holes in the ductwork. If there are large holes in your air ducts, then cold air from your attic or crawlspace might get into the ductwork. This can be solved using aerosol duct sealing. An inspection by an expert can help determine whether the ducts that carry air throughout the building are leaking.

Your Dependable Newburgh Professionals

When you rely on our experience and keep to a regular maintenance schedule, you can avoid most, if not all, of the above-mentioned problems. This will keep your furnace running at an optimal level and drastically reduce the likelihood of breakdowns that require major repairs. However, even with the best maintenance, the system will eventually get old and stop performing as well. When that occurs, the best remedy is to call us to schedule a new system installation.

Polar Plumbing, Heating & Air Conditioning is an award-winning company that provides the Newburgh community with outstanding heating, cooling, and indoor air quality installation, repair, and maintenance. We also provide a full line of plumbing services. We have highly trained and dedicated NATE-certified technicians, and we belong to the ACCA. Our mission is to provide trustworthy, transparent, and cost-efficient solutions to all your HVAC and plumbing needs. Just remember that our team at Polar Plumbing, Heating & Air Conditioning has your back. Call us today to ask any questions you may have or to schedule an appointment.

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