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What’s Causing That Furnace Clicking Sound?

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If your furnace makes clicking noises when turning on, we’ve got you covered. Furnaces can make a variety of sounds that can indicate both normal operation or potential problems. A clicking noise could be due to several factors, from an issue with the gas valve or igniter to a problem with the blower motor or heat exchanger.

It’s important to be able to identify where the clicking sound is coming from and what may be causing it. Determining the source and possible cause of furnace clicking can help HVAC technicians more quickly and accurately diagnose the problem when servicing your system. In this article, we’ll explore the most common causes of furnace clicking noises and provide troubleshooting tips you can try before calling in a professional.

Potential Causes of Furnace Clicking

Furnaces require several components to work together properly to ignite the gas burners. When there is a problem with any part of this ignition sequence, it can produce audible clicking or ticking as it tries to light.

Common causes of furnace clicking noises include:

  • Malfunctioning Thermostats: Defective thermostats that fail to send the proper call for heat signals can lead to abnormal and repeated ignition attempts.
  • Faulty Ignition System: An issue with the spark igniter, flame sensor, or other ignition components can lead to clicking as it fails to ignite.
  • Pilot Light Problems: A dirty pilot burner or thermocouple issue can cause the pilot light to repeatedly try to ignite, making a clicking noise. Most pilot lights do not relight as they are constantly burning. There are intermittent pilots, but these are rare and on much older furnaces.
  • Gas Valve Issues: A faulty gas valve struggling to open can click as it tries to allow gas to flow to the burner.
  • Flame Sensor Problems: A defective flame sensor will fail to detect burners igniting, causing repeated ignition clicks as it tries to light.
  • Relay Issues: Sticking relays that control the ignition sequence can cause chattering clicks.

Identifying and resolving the specific problem is key, as an ignition issue can lead to wasted energy, carbon monoxide leaks, and potential fires.

Troubleshooting Steps for Furnace Clicking Noises

Extensive repair and maintenance are best left to qualified HVAC technicians. There is limited service homeowners can safely perform on their own, but being able to identify common problems can be helpful before calling in an expert.

Start troubleshooting by performing some simple maintenance steps:

  • Replace thermostat batteries
  • Change furnace air filters
  • Clean around and under the furnace
  • Clear debris from the blower motor
  • Inspect the gas line valves to see if they are fully open
  • Check for obstructions in vents and chimney

Turning to Professional Repair Services

If the clicking persists after basic maintenance, contact a certified HVAC technician for a comprehensive furnace inspection and repairs. A technician can:

  • Pinpoint the origin of clicking noise
  • Test components like gas valve, igniter, and relay
  • Assess heat exchanger, burners, blower motor, and ductwork
  • Perform necessary repairs and replacements
  • Ensure the furnace is operating safely and efficiently

Addressing unusual gas furnace noises right away can help avoid larger breakdowns or hazardous conditions. While some clicking may be normal, it’s best to consult HVAC professionals to diagnose furnace noises.

Regular Furnace Maintenance: A Preventative Measure

Having your furnace maintained regularly is one of the best ways to keep it running safely and efficiently for years to come. Professional maintenance can identify and address minor issues before they become major repairs. It can also improve the lifespan of your system.

Regular servicing provides many benefits:

  • Thorough inspection of all system components
  • Cleaning of key parts like blower motors and heat exchangers
  • Checking for leaks, cracks, or damage
  • Lubricating moving parts
  • Testing for proper operation and performance

Proper maintenance prevents problems like furnace clicking noises before they occur. It improves safety, efficiency, indoor air quality, and the overall lifespan of your HVAC system. Investing in regular tune-ups by qualified technicians provides peace of mind your furnace will operate smoothly for years to come. Check out this article if your furnace is making noise while in off mode.

The Logan Difference

When you’re ready to have your furnace serviced, turn to the experts at Logan A/C & Heat Services. We proudly provide installation, maintenance, and repair for all HVAC products. With over 50 years of HVAC experience, Logan A/C & Heat Services is Greater Dayton, Cincinnati, and Columbus’ top choice for HVAC installation and ongoing maintenance.

Here’s why homeowners trust Logan A/C & Heat Services:

  • Expert Technicians & Flawless Installations: Logan’s factory-trained technicians properly install your air conditioning or heating system to manufacturer specifications using detailed checklists and manager oversight.
  • Quality Workmanship: Our “Quality Trifecta” of teamwork, communication, and commitment ensures every job meets high standards.
  • Educational Experience: We take the time to walk you through your system, address all questions, and handle warranty details so you have true peace of mind.
  • Stellar Track Record: Logan is an award-winning company in Dayton, Columbus, and Cincinnati, Ohio. In addition, Logan is a Diamond Elite Contractor for Mitsubishi Electric and the largest volume Trane furnace dealer in Ohio.
  • Dedicated Service: As a family-owned local business, Logan provides personalized maintenance to maximize your system’s performance.
  • Industry Leader: Logan’s 50+ years of experience, awards, and accreditations give homeowners confidence in their expertise.

At Logan, your satisfaction means everything to us. Contact us today to learn more about servicing your furnace. We offer same-day estimates and affordable financing options, so you don’t have to break the bank.

Frequently Asked Questions

What causes furnace clicking noises?

Furnace clicking is most often caused by ignition or pilot flame problems that prevent smooth startup. Faulty ignition parts, weak pilot flames, and gas valve issues can contribute to the clicking noise during startup.

Is it dangerous when a furnace clicks trying to ignite?

Yes, the repeated clicking noise may indicate that your gas furnace is struggling to properly light and run. This could allow gas or carbon monoxide to build up, posing safety hazards. It also reduces efficiency and strains furnace components.

When should I call an HVAC professional for furnace clicking?

If DIY troubleshooting does not resolve the clicking noise, it’s best to call an HVAC technician to properly diagnose and repair the problem. Persistent clicking or other performance issues require professional help.

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