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Why Is My Furnace Blowing Cold Air?! | Rockwall, TX

The alarm goes off. You get out of bed, and realize, IT'S COLD in your house!! Most of us, in North Texas have dealt with a broken furnace, and all of us can agree, it's not the way to start your day. Why do furnaces blow cold air though? Let's see if we can give you a better idea of what's going on with that old furnace.

Proper Furnace Operation(Basic Description)

Gas Furnaces: The burners are lit by an ignitor or pilot light. The controlled flames from your burners warm the heat exchanger. The blower draws air through the filtration system, and pushes it past the heat exchanger and through the duct work, picking up heat in the process. Propane furnaces operate in the same manner.

Electric Air Handlers: Rather than a pilot light, air handlers uses spiral heating elements(similar to a space heater) to warm the air. As electricity begins to pass through the heating element, it glows red hot, and heats the air being moved by the blower. Many electric furnaces have multiple stages of heating.

What's Wrong With My Furnace?!

As with any machine, there are several things that can wrong with a furnace. Here's a few of the most common causes of a broken furnace in Rockwall, Tx.

Dirty Filters: A dirty filter can wreak havoc on your system in the summer, and the winter. Make sure your filter is clean, and installed properly.

Ignition: A broken ignitor, or relay is a very common cause of failure.

Temperature Safety Limits: All furnaces have safety feature designed to keep temperatures at safe levels. An overheating furnace can be very dangerous, so safety devices shut down the equipment, and typically run the fan in a constant ON mode.

Gas Leaks: Gas and Propane Furnaces require proper, steady gas pressure. Gas pressure at the gas valve is normally checked during preventative maintenance visits.

Clogged Exhaust Vent: With gas and propane powered furnaces, they must be able to safely exhaust the Carbon Monoxide outside of the home. If the exhaust pipe, or Flue pipe, is clogged, modern systems shut down for safety.

How Do I Fix My Broken Furnace?

In short, You Don't! These can be dangerous machines, and You should leave the repair and replacement of your Heating and Cooling Equipment to the experts at Cool Casa.

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