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Does Cold Air Blowing From my System Mean I Have a Broken Heater?

Heating and Cooling Pros from Manchester, NH explain possible reasons why your heater is blowing cold air.

Raymond, United States - November 23, 2019 / Skovron Mechanical Services LLC. /

Is The Heater Broken?

Many people panic if they feel cool air blowing from their heater. Before jumping to immediately call a professional, there could be a few things that you could do to troubleshoot the problem and fix it quickly. People will want to check the furnace settings, make sure their heater isn’t overheating, or check the air filters to see if they are dirty. With a few simple tips, you can easily address these heating issues quickly, keeping your home and family comfortable throughout the winter season.

Check the Furnace Settings First

One of the first places that you want to check for a heater blowing cold air is the settings on the furnace. If your thermostat’s setting is set to “on”, that means that your heater’s fan is constantly on. As a result, cool air can be constantly blowing cool air. Your thermostat should be set to “Auto” so that the fan kicks on only when it needs to.

furnace settings

If you have recently installed a new thermostat, you may have chosen a thermostat that is not compatible with your heating system. Don’t forget to check the batteries as well. Many people forget that they can run out and cause problems with your heat.

Is Your Unit Overheating?

overheated heaterThere are many possible reasons why a heater may overheat. One of the most common reasons is airflow. If the furnace is not receiving enough air, it can easily overheat. Go around your house and check all of your vents to make sure they are not blocked.

This can easily restrict airflow. It is understandable that many people will close some vents to save money, but overheating will occur if 60% of the vents are blocked. Another step you will want to take is to check the furnace’s blower fan. This supplies air to the heat exchanger, which if blocked or dirty, will lead to overheating.

One final area you want to check is the evaporator coil. The coil absorbs heat from the air in your house. If it gets damaged or too dirty, it may consistently shut down your furnace to avoid overheating. This should be checked and cleaned once a year. If you are uncomfortable with any of these possible causes for overheating, feel free to give us a call.

Remember to Replace Filters

Probably one of the biggest reasons why a heater could overheat is that the air filters are dirty. These filters are used to block dust, dirt, and other particles that could pass through the air. As the filters collect all this debris and keep the air in your home clean, it can become clogged.

dirty air filters

Many air filters should be changed every three months to ensure that your furnace remains clean and free of overheating. The clogged air filter will restrict the flow through the heat exchanger, which will signal to the computers to shut down the furnace. The furnace will never be able to restart if the air filters remain clogged.

About Skovron Mechanical Services LLC.

Established in 2005, Skovron Mechanical Services LLC. is the preferred Manchester heating and cooling team for residential and commercial customers. The customers' complete safety and comfort is their priority. Superior service can always be expected and guaranteed to keep your HVAC systems running smoothly for years to come.

Contact Information:

Skovron Mechanical Services LLC.

66 Main St
Raymond, NH 03077
United States

Vicky Cleveland
(603) 674-9885

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