Why is my furnace making a buzzing noise

Residential and industrial furnaces can make some alarming and curious sounds when they aren’t functioning properly. If you or your employees are wondering why a furnace is making buzzing noise, the source could be malfunctioning electrical components, fans, or transformers. Buzzing sounds can also be attributed to lack of lubricants, cleaning, and routine maintenance.

If the HVAC in your office building sends auditory alerts like buzzing, our HVAC contractors are always ready to inspect and/or fix your HVAC equipment. We do more than commercial to industrial refrigeration repair!

In the meantime, here are some troubleshooting tips you can try to identify potential issues before reaching out for professional help.

Troubleshooting Tips: Causes and Fixes for Buzzing Furnace

Is a buzzing furnace dangerous? Potentially, yes. A low humming noise or muted, constant buzzing may indicate no immediate danger, while loud buzzing is likely something that should be investigated as soon as possible. Call RCC, available 24/7 for emergency HVAC repair.

If you’re a business owner or property manager facing buzzing noises from your furnace, here are some common causes along with potential solutions (Turn off the power source to the furnace before attempting any troubleshooting or repairs to avoid electrical shock or further damage):

Loose Parts

Cause: Vibration can lead to screws, bolts, or panels becoming loose.

Solution: Inspect and tighten any loose components. This provides a temporary fix. A furnace professional should evaluate it for a more permanent solution.

Electrical Problems

Cause: Damaged wiring or loose connections can create buzzing sounds.

Solution: Check visible wiring for signs of wear or looseness. If you find any issues, turn off the power and contact an expert immediately. Do not attempt to repair electrical problems with your office’s HVAC system.

Capacitor Problems

Cause: A faulty capacitor could produce noise if it’s still holding a charge or malfunctioning

Solution: Inspect the capacitor for visible signs of damage. It may need to be replaced by a professional.

Fan Malfunctions

Cause: A faulty fan or motor may produce noise.

Solution: Look for obstructions or dirt and grime on the fan blades. Clean them as needed. If the buzzing continues, have a technician inspect the motor.

Transformers

Cause: Transformers can emit buzzing noises due to the electrical load they carry.

Solution: While some noise is normal, excessive buzzing should be assessed by a professional.

Ductwork Issues

Cause: Problems with airflow in the ducts can lead to vibrations and noise.

Solution: Check for blockages or loose sections in the ductwork. Secure any loose fittings.

Low Refrigerant Levels

Cause: If you’re dealing with a system that involves both heating and cooling, like a heat pump, then it uses refrigerant. Low levels of refrigerant can force the unit to work harder, causing noise.

Solution: This issue requires a professional to evaluate and recharge refrigerant levels as necessary.

By investigating these possible causes, you might be able to reduce or eliminate the buzzing sound, but a professional assessment is recommended for a complete evaluation and lasting solutions. Request HVAC service now to get started and gain peace of mind.

Buzzing Furnace & The Professionals

At Refrigeration Control Co., we specialize in servicing and repairing heating systems, ensuring that any issues, like a buzzing furnace, are promptly addressed for your comfort and safety. Our HVAC contractors are equipped to handle all your HVAC needs, from large commercial buildings to small enterprises.

We also provide installation services and HVAC engineering expertise, while prioritizing safe and healthy working conditions for you and your employees.

Moreover, our HVAC engineering team is equipped to assess, design, and install systems customized to meet your unique needs. Our experienced technicians handle a wide range of industrial, commercial, and residential mechanical refrigeration, compressor, and air conditioning systems, including heat pumps, ventilation systems, laboratory equipment, food service appliances, and air dryers.

Preventive Maintenance to Avoid Future Noises

Maintaining a commercial furnace system is essential for ensuring optimal performance, energy efficiency, and comfort in your building. Regular upkeep not only helps prevent unexpected breakdowns but also extends the lifespan of your equipment. Here are some key tasks and tips that business owners and property maintenance professionals can follow to keep their furnace running smoothly and effectively

• Check and Replace Air Filters: Inspect air filters monthly and replace them every 1-3 months. Clogged filters can restrict airflow, potentially causing furnace buzzing noise as it struggles to operate efficiently.
• Schedule Annual Professional Maintenance: Have a qualified HVAC technician perform a thorough inspection and tune-up once a year to identify potential issues before they become serious.
• Inspect Ductwork for Leaks: Check ducts biannually for any signs of leaks or blockages, which can reduce efficiency and increase energy costs.
• Monitor for Unusual Noises: Listen for any unusual sounds (like buzzing or rattling) during operation and address them immediately to prevent further damage.
• Inspect the Thermostat: Test the thermostat monthly to ensure it is functioning correctly and accurately reflecting the desired temperature.
• Clean the Furnace and Surrounding Area: Dust and vacuum around the furnace monthly to prevent debris buildup and ensure proper airflow.
• Check Ventilation: Inspect vents and exhaust flues quarterly to ensure they are clear of obstructions and allow for proper ventilation.
• Test Safety Features: Check safety controls and shut-off switches annually to ensure they are functioning properly and safely.
• Keep Records of Maintenance: Maintain a log of all maintenance activities, inspections, and repairs to track the system’s history and any recurring issues.

By investigating these potential causes, you may be able to reduce or eliminate the buzzing noise coming from your furnace. However, for a thorough assessment and lasting solutions, consulting a professional is highly recommended.

At Refrigeration Control Co., our experienced HVAC technicians are here to ensure your heating system operates efficiently and safely.

Don’t hesitate to reach out for service; addressing issues early can enhance the comfort and safety of your business environment, giving you peace of mind for you and your employees.