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6 Common Furnace Problems and How to Address Them

When the chilly winds of winter start to blow, your furnace becomes an indispensable part of your home's comfort system. However, like any mechanical system, furnaces are prone to issues that can disrupt their performance. As HVAC experts, we have encountered numerous furnace problems over the years. We'll discuss six common furnace problems and what you can do to address them.

1. Lack of Heat Production

Problem: Your furnace is running, but it's not producing enough heat to keep your home warm.

Solution: This issue can often be attributed to a dirty or clogged air filter. A dirty filter restricts airflow, making it harder for the furnace to heat your home efficiently. Replace or clean your air filter regularly, typically every 1-3 months, to ensure proper airflow. If changing your clogged filter doesn't help, it's time to call your Guardian expert to save your day!

2. Constantly Running Blower

Problem: Your furnace's blower runs continuously, even when it's not supposed to.

Solution: This could be due to a faulty thermostat or a wiring issue. Check your thermostat settings to make sure it's set to "Auto" rather than "On." If the problem persists, consult an expert HVAC technician to diagnose and repair any wiring or thermostat issues.

3. Strange Noises

Problem: Your furnace is making unusual noises such as banging, clanging, squealing, or rattling. This is not normal.

Solution: Unusual noises are often a sign of mechanical issues. Banging sounds may indicate a loose or damaged part, while squealing noises could be due to a worn-out belt. Rattling may suggest loose components. It's best to have a technician inspect and repair the problem to prevent further damage.

4. Pilot Light Issues

Problem: If you have an older furnace with a pilot light, it might go out frequently.

Solution: Pilot light issues could be due to a dirty or clogged pilot orifice, a malfunctioning thermocouple, or a gas supply problem. Consult your furnace's manual for instructions on relighting the pilot, or call a professional to inspect and repair the pilot light. Make sure your expert checks your heat exchanger for potential cracks.

5. Short Cycling

Problem: Your furnace frequently turns on and off in short cycles.

Solution: Short cycling can be caused by a variety of issues, including a clogged air filter, a malfunctioning thermostat, or improper furnace sizing. Start by checking and replacing the air filter. If the problem persists, consult your Guardian expert to diagnose and address the root cause.

6. No Heat at All

Problem: Your furnace is not producing any heat. Your vents are only blowing cold air.

Solution: This can be a frustrating problem, especially during the winter months. First, check to ensure that the thermostat is set to "Heat" mode and the desired temperature. If everything seems correct, inspect your furnace's circuit breaker to ensure it hasn't tripped. If all else fails, contact a professional technician to diagnose and repair the issue.

Maintaining a warm and comfortable home during winter relies on the proper functioning of your furnace. While some minor furnace issues can be resolved with DIY solutions, it's essential to recognize when it's time to call in a professional HVAC technician. Regular heating maintenance and prompt attention to furnace problems can help ensure a cozy and trouble-free winter season. Don't hesitate to reach out to a trusted HVAC expert if you're unsure how to address a furnace issue or if problems persist despite your efforts. Guardian has been serving homeowners from Alpharetta to Dallas, repairing their furnace and heat pumps with over 25 years of experience. Voted 'Best HVAC Company in Atlanta' 3 years in a row, we are certain we can repair your heater quickly and with the 5 star service we are known for! Schedule your heater repair online today.


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