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Troubleshooting Your Furnace: Tips from HVAC Experts

TL;DR: Learn how to troubleshoot common furnace issues like starting problems, uneven heating, and strange noises. Regular maintenance and professional help, like from Price Heating and Air, ensure your furnace runs smoothly, keeping your home cozy during winter.

Welcome to our guide on troubleshooting your furnace, where we offer expert insights to help you navigate common heating issues like a pro. Your furnace is the unsung hero of your home, quietly keeping you warm during the chilly months. However, like any mechanical system, it can encounter problems that require attention. Whether you’re dealing with strange noises, poor airflow, or other issues, we’ve got you covered.

At Price Heating and Air, we understand the importance of a well-functioning furnace for your comfort and safety. With years of experience in the HVAC industry, we’ve seen it all. In this guide, we’ll walk you through some common furnace problems and provide practical tips for troubleshooting them. Let’s dive in!

Identifying Common Furnace Problems

One of the first steps in troubleshooting your furnace is identifying the problem at hand. Here are some common issues you might encounter:

  • Failure to Start: If your furnace isn’t turning on, check the thermostat settings, power supply, and circuit breaker to ensure everything is in order.
  • Uneven Heating: If certain rooms in your home feel colder than others, there could be issues with airflow or ductwork.
  • Strange Odors: Foul or unusual odors coming from your furnace could indicate a variety of problems, from a dirty air filter to a gas leak. It’s essential to address these issues promptly for safety reasons.

Assessing Airflow: Ducts and Vents Inspection

Proper airflow is crucial for efficient heating. Here’s how you can assess and improve airflow in your home:

  • Inspect Ductwork: Check for any visible signs of damage or blockages in your ductwork. Leaks or obstructions can hinder airflow and reduce the efficiency of your furnace.
  • Clean Air Vents: Dust and debris can accumulate in air vents over time, obstructing airflow. Regularly vacuuming or dusting your vents can help maintain optimal airflow throughout your home.
  • Consider Duct Cleaning: If your ducts are excessively dirty or clogged, professional duct cleaning may be necessary to improve airflow and indoor air quality.

Detecting Strange Noises: What Your Furnace Is Telling You

Strange noises coming from your furnace can be a cause for concern. Here are some common noises and their possible causes:

  • Rattling or Banging: Loose or broken components within the furnace, such as blower wheels or heat exchangers, can cause rattling or banging noises.
  • Squealing or Screeching: These noises often indicate issues with belts or bearings within the furnace motor. It’s essential to address these issues promptly to prevent further damage.
  • Booming or Popping: Delayed ignition or buildup of gas within the furnace can cause booming or popping noises. This can be a serious safety hazard and should be addressed immediately by a professional.

Final Thoughts

Your furnace plays a vital role in keeping your home comfortable, especially during the colder months. By familiarizing yourself with common furnace problems and troubleshooting techniques, you can ensure that your heating system remains efficient and reliable.

If you encounter any issues beyond your expertise or feel unsure about handling furnace repairs, don’t hesitate to contact the professionals at Price Heating and Air. Our team of experienced HVAC technicians is here to help diagnose and resolve any furnace problems you may encounter. Stay warm and comfortable all winter long with Price Heating and Air by your side!


How often should I replace my furnace filter?

It’s recommended to replace your furnace filter every 1 to 3 months, depending on factors like filter type, household size, and air quality. Regular filter changes help maintain efficient airflow and improve indoor air quality.

Why is my furnace blowing cold air?

Several factors could cause your furnace to blow cold air, including a malfunctioning thermostat, a dirty air filter, or a faulty pilot light or ignition system. It’s best to check these components first, and if issues persist, consult a professional HVAC technician for further diagnosis and repair.

How can I improve the efficiency of my furnace?

To improve furnace efficiency, start by scheduling regular maintenance, including cleaning or replacing air filters, inspecting ductwork for leaks or blockages, and lubricating moving parts. Additionally, consider upgrading to a programmable thermostat and ensuring proper insulation and sealing in your home to minimize heat loss.

Is My Furnace Limit Switch Faulty in Muscle Shoals, AL?

Winters in Muscle Shoals, AL, can get chilly, but your home should feel warm and cozy inside. If your home has a furnace, it should operate safely and efficiently to keep your family comfortable, but there might be times when parts of it break down and disrupt the operations. Keep reading to learn warning signs or potential problems of a faulty furnace limit switch.

Overheated Exchanger

A blocked air filter can make your limit switch keep your furnace from even starting. Substantially decreased airflow can result in an overheated exchanger, and if your limit switch detects this, it should deactivate the burner. However, a faulty limit switch might fail to perform this safety check and let your exchanger get too hot.

Furnace Won’t Stop

Your furnace blower should stop when the system hits the temperature you want your home to be, but a malfunctioning limit switch might keep the blower running. Continuous blower operation can spike electricity bills and accelerate wear and tear, eventually leading to total HVAC system failure in the long term.

Dirty Flame Sensor

Our HVAC maintenance service technician might need to check whether the limit switch’s flame sensor rod is clean or dirty. Inside the furnace’s plenum, this sensor rod measures air temperatures. It can’t do this effectively if it’s not clean, which might result in some limit switch trips that disrupt the whole system.

Constant Tripping

The limit switch halts furnace operations until temperatures stabilize but might trip before a heating cycle finishes. Frequent tripping of this nature is a short cycling malfunction, which can drive up your power bills and deteriorate your system functionality.

Aging Matters

Sometimes, recurring limit switch tripping happens due to natural wear and tear over time. If you don’t have one of our service technicians replace it, the system could go into a lockout mode where it doesn’t work until replacing it.

Watch out for the signs of a faulty furnace limit switch so you can have it fixed and keep your heating system running smoothly. Contact us Price Heating and Air for all the heating repairs that your home requires.

Why Doesn’t My Furnace Ever Stop Running in Florence, AL?

Dealing with a furnace that won’t stop running in Florence, AL, is both a nuisance and a strain on your finances. A heating system is an intricate machine that requires many different components to work together to properly heat your home. Here are several common reasons a furnace won’t stop running:

Temperature Is Set Too High

Your furnace will try to heat your home to whatever temperature is set on your thermostat. If that temperature is set too high, your system may constantly run to try and reach that goal.

Dirty Air Filter

A dirty air filter can negatively impact the performance of your heating system by restricting airflow through it. This airflow issue causes your furnace to struggle to maintain your desired temperature. As a result, the heating system won’t stop running.

Malfunctioning Pilot Light

Do you have a gas furnace? The pilot light is the mechanism that ignites the gas supply before reaching the burner.

If your pilot light doesn’t stay lit, your furnace won’t reach its desired temperature, causing it to continuously cycle on and off. Scheduling regular maintenance can help spot pilot light issues before they become a major problem.

Leaks in Ductwork

Leaks can occur anywhere within your ductwork. When a leak is present, the warm air pushed throughout your home by your heating system will escape, while cold outside air will take its place. This results in your home never reaching the temperature set on your thermostat, causing your furnace to continue to run to try and heat your home as intended.

Undersized Furnace

An undersized heating system for the size of your home will have trouble properly warming it. In this scenario, your furnace simply doesn’t have the capacity to reach the target temperature and will strain itself trying to do so.

There are many different reasons a heating system will constantly run, including incorrect temperature settings, dirty air filters, pilot light issues, leaky ductwork and an undersized system for your home. If you’re dealing with a furnace that won’t shut off, contact Price Heating and Air today.