Why Is My Heater Blowing Cold Air?
During the colder months, the last thing you want is for your heater to start blowing cold air. It can be perplexing to think about why your system is doing the exact opposite of its intended function. In this post, Ky and Rob's HVAC Plus will explain the potential reasons your heater may not be functioning correctly and offer solutions to get your home cozy again.
Thermostat Settings
One of the first things to check when your heater is blowing cold air is the thermostat settings. Incorrect settings are a common culprit for this issue. Ensure your thermostat is set to "heat" and not "cool," and adjust the fan setting to "auto" instead of "on." The "on" setting will cause the fan to blow continuously, even when the heating cycle is not active, potentially leading to cold air being circulated.
Furnace Filter
A dirty or clogged furnace filter can significantly impact the efficiency of your heating system. Over time, dust and debris accumulate in the filter, restricting airflow and causing the furnace to overheat. When this happens, the safety switches in the furnace will shut the unit down to prevent damage, leading to cold air being blown. It's essential to check and replace your furnace filter regularly to avoid this issue.
Pilot Light and Ignition Problems
The pilot light going out is a common issue in older furnaces. Newer models can suffer the same problem, which can be a result of electronic ignition issues. Both situations prevent the furnace from generating heat, resulting in the system blowing cold air. Relighting the pilot light or addressing the ignition system requires professional assistance to ensure it's done safely and correctly.
Gas Supply Issues
The furnace needs a steady supply of natural gas or propane to produce heat. If there's a problem with the gas supply—whether it's turned off or there's an issue with the gas line—the furnace will not be able to ignite the fuel to generate heat. Ensuring the gas supply is uninterrupted and functioning correctly is crucial for the efficient operation of your heating system.
Air Duct Leakage
Leaky air ducts can also be a source of the problem. If there are holes or gaps in the ductwork, hot air might escape before it reaches your living spaces, making it seem like the heater is blowing cold air. Sealing and insulating your ducts can ensure that hot air is efficiently distributed throughout your home.
Overheating Furnace
An overheating furnace can shut itself off as a safety precaution, leaving the fan to blow cold air. This can be caused by a variety of issues, including a dirty air filter, restricted airflow or mechanical failure. Regular maintenance is necessary to avoid these issues and ensure your heating system functions correctly.
Stay on top of heater problems before winter arrives! Turn to the best in the local area,
Ky and Rob's HVAC Plus. Dial
(385) 600-2750, or fill out this
contact form to reach us for an appointment.
