As the temperature drops and winter approaches, a properly functioning furnace is essential for maintaining a comfortable and warm home. However, like any mechanical system, furnaces can experience problems over time. In this blog, we’ll explore the most common furnace issues, helping you identify and understand them. We’ll also provide some guidance on how to repair or when to seek professional help from an HVAC company.
Common Furnace Problems and How to Address Them
Thermostat Isn’t Working
If your home feels chilly despite setting the thermostat to a comfortable temperature, the issue might be with the thermostat itself. Check to ensure the thermostat is set correctly and replace the batteries if needed. If the problem persists, it could be a wiring issue or a malfunctioning thermostat, which may require professional assistance to repair or replace.
Ignition or Pilot Light Problems
Many older furnaces rely on a pilot light to ignite the burners, while newer models use electronic ignition systems. If the pilot light is out or the electronic ignition isn’t working, your furnace won’t heat your home. For a pilot light issue, you can usually relight it following the manufacturer’s instructions. If it’s an electronic ignition problem, it’s best to contact an HVAC technician to diagnose and repair the issue.
No Heat or Insufficient Heat
When your furnace is running but not providing sufficient heat, it could be due to various factors. First, check the air filter to ensure it’s not clogged. If that’s not the issue, it could be related to a malfunctioning blower motor, faulty thermostat, or even an undersized furnace. To pinpoint the problem, it’s advisable to consult a professional HVAC technician who can diagnose the issue accurately.
Strange Noises
Unusual noises coming from your furnace can be concerning. Common noises include rattling, banging, or squealing.
- Rattling or banging can indicate loose or damaged components, such as screws, panels, or blower fan blades.
- High-pitched squealing or screeching noises can indicate issues with the blower motor or belt. A technician can determine the exact cause and recommend the appropriate repair.
- A grinding noise often could be due to worn-out bearings, a misaligned blower wheel, or a foreign object obstructing its movement. Turn off the furnace immediately if you hear grinding noises. Continuing to run the furnace in this condition can cause severe damage. A technician should inspect the motor and blower wheel, replace worn-out parts, and remove any obstructions.
Dirty or Clogged Filters
Dirty or clogged filters are among the most prevalent issues homeowners face. When filters become congested with dust and debris, the furnace has to work harder to circulate air, leading to reduced efficiency and increased energy consumption. To address this issue, simply replace or clean your filters regularly, typically every 1-3 months, depending on the type of filter and usage.