Why Does My Furnace Make Clicking Noise When Turning On?
If your furnace makes a clicking noise when turning on, it’s natural to feel concerned. While this sound is not uncommon, it often signals that something within your heating system requires closer inspection. Understanding the possible causes of this noise can help you determine whether it’s a minor problem or something that requires professional repair.
This blog post will explore why your furnace is making a clicking noise and how to troubleshoot the issue.
Common Causes of Clicking Noises in Furnaces
Ignition Issues (Gas Furnace)
In gas furnaces, a faulty ignition system is a frequent cause of clicking noises. If the igniter fails to light the gas, you’ll hear a clicking as the system repeatedly tries to ignite.
Faulty Flame Sensor (Gas Furnace)
A malfunctioning flame sensor in gas furnaces can prevent gas from being ignited, leading to repetitive clicking noises as the furnace attempts to start. Cleaning or replacing the sensor can often resolve this issue.
Expanding and Contracting Metal (Gas and Electric Furnaces)
As the furnace heats up, its metal components expand and contract. This natural heating and cooling process can create clicking sounds, which are typically harmless but can be unsettling.
Loose or Damaged Components (Gas and Electric Furnaces)
Loose screws, panels, or internal components can vibrate and make clicking sounds as the furnace operates. Tightening these parts often eliminates the noise.
Thermostat Malfunctions (Gas and Electric Furnaces)
Sometimes, a defective thermostat can cause rapid cycling of the heating system, leading to clicking noises. Replacing or repairing the thermostat can fix this issue.
Air Flow Restrictions (Gas and Electric Furnaces)
Blocked or dirty air filters can restrict airflow, causing the system to strain and produce clicking noises as it tries to circulate air. Regularly replacing or cleaning air filters can prevent this problem.
Electrical Issues (Gas and Electric Furnaces)
Faulty wiring or malfunctioning electrical components can result in intermittent clicking sounds. It’s essential to have these electrical issues checked by a professional to avoid potential hazards.
How to Prevent Clicking Noises in Furnaces?
Listen for Unusual Noises
Be attentive to the sounds your furnace makes. Identifying and reacting to changes in noise can be key to preventing long-term damage.
Clean and Replace Filters Regularly
A clogged filter can strain your furnace and lead to various noises, including clicking. Check your filters every 1-3 months and clean or replace them as needed.
Inspect and Tighten Components
Periodically check for loose screws, panels, or other mechanical parts within your furnace. Use an appropriate tool to tighten these parts securely to prevent them from vibrating and making noise.
Monitor Thermostat Functionality
Keep an eye on your thermostat’s performance. If it starts causing your furnace to turn on and off frequently (short cycling), it may need to be recalibrated or replaced.
Keep the Ignition System in Good Shape
For gas furnaces, ensure the ignition system is clean and in good working order. Regular cleaning of the igniter and flame sensor can help prevent problems that lead to clicking noises.
Address Electrical Issues Promptly
If you suspect any electrical problems, such as faulty wiring or a malfunctioning control board, have these inspected and repaired by a professional.
Regular Maintenance Checks
Schedule annual or bi-annual inspections with a qualified HVAC technician. These professionals can catch and fix small issues before they turn into bigger problems that cause clicking noises.
Schedule Regular Maintenance with Air Control Services in Las Cruces NM
To prevent unwanted noises and ensure your furnace operates smoothly, schedule routine maintenance with us at Air Control Services in Las Cruces, NM. With over 35 years of HVAC experience, we keep your system efficient and safe all year round.
Call (575) 636-2754 to schedule furnace maintenance service with us! We’re here to keep your furnace running at its best!