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why is there a low hum coming from my A/C?
Posted On: September 17, 2023
A low hum coming from your air conditioning (A/C) unit can have several possible causes. It's important to diagnose and address the issue promptly to prevent further damage or inefficiency in your A/C system. Here are some common reasons for a humming sound in your A/C:
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Normal Operation: Some A/C units produce a low humming sound when they are running as part of their normal operation. This sound may be more noticeable when the A/C unit is first starting up or when it's working particularly hard to cool your home.
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Loose Parts: A loose or improperly secured component within the A/C unit can cause vibrations that produce a humming sound. Check for loose panels, fasteners, or brackets that may need tightening.
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Fan Motor Issues: The A/C unit's fan motor can develop problems over time, such as worn bearings or a misaligned fan blade. These issues can lead to humming sounds as the fan operates. If the fan motor is the problem, it may need to be lubricated, repaired, or replaced.
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Refrigerant Issues: A low refrigerant charge or other issues with the refrigerant lines can lead to abnormal noises in your A/C unit, including humming sounds. Refrigerant issues should be addressed by a professional HVAC technician.
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Electrical Issues: Faulty electrical components, such as capacitors or contactors, can produce humming sounds. Electrical problems should always be handled by a qualified technician to avoid electrical hazards.
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Compressor Problems: The compressor is a critical component of your A/C system, and problems with it can result in humming sounds. Compressor issues may require professional diagnosis and repair.
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Dirty or Clogged Condenser Coil: If the condenser coil becomes dirty or clogged with debris, it can affect the A/C unit's efficiency and create unusual noises. Regular maintenance, including cleaning the coils, can help prevent this.
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Ductwork Issues: Sometimes, the source of the humming sound may not be the A/C unit itself but rather an issue with the ductwork. Loose or improperly insulated ducts can transmit sounds from the A/C unit throughout your home.
If you're experiencing a low hum from your A/C unit, and it's not part of normal operation, it's a good idea to have it inspected by a professional HVAC technician. They can diagnose the specific issue and recommend the necessary repairs or maintenance to ensure your A/C system operates efficiently and quietly. Additionally, regular maintenance and cleaning of your A/C unit can help prevent many of these issues from occurring in the first place.
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See What Our Customers Are Saying:
May 13, 2020
We are very happy with our new furnace. The service was excellent the guys worked 6 hours straight through and there was no mess at all they took the old furnace boxs etc with them they then explained everything to us they were very helpful and pleasant , when we need a new air conditioner we know who to call!
May 12, 2020
The crew from sales to installation was very professional and had great attention to detail
May 11, 2020
We couldnt have been more impressed with Twintech - from our first service call with Mitch who took the time to thoroughly diagnose the issue with our furnace, to Dave who proposed a well thought out solution to meet our needs and finally Greg and team who acted quickly to install given we had no heat.
We did our due diligence by soliciting quotes from alternate providers and were shocked and disappointed by the aggressive and manipulative tactics used.
Twintech was honest in their approach, detailed in their product knowledge, reasonably priced, diligent in their follow-up and valued our business.
Well done Twintech! You made this a positive experience for us and our new furnace works beautifully!
May 10, 2020
We recently purchased an Amana high efficiency furnace and humdifier through Twintech. The work was completed very professionally and the quality of the workmanship was high. There was some additional sheet metal work required to complete the installation, which they were able to complete themselves. Overall I am very pleased with the work and would highly recommend Twintech for a furnace replacement.
May 9, 2020
We were very pleased with every aspect of the work that was done. They were very professional and polite. They arrived when they said they would and job was completed on estimated time
We would highly recommend them to whoever needed a recommendation
We have a very large dog and they were very understanding and respectful of him being around
May 8, 2020
The blower on our furnace stopped working leaving us with a cold house. Dave from TwinTech responded immediately to our HomeStars service request. From beginning to end Dave was nothing but helpful, friendly and professional, he did a great job of walking us through the quote and scope of work.
The replacement of the furnace went smoothly. The Guys did a great job, everyone was very friendly and polite. There were no hiccups, or unexpected costs. The only surprise was they left the work area cleaner than it was before they started.
Was a great experience with the whole TwinTech team. Its been a couple of months since the new furnace has been installed and its working great!
May 7, 2020
I heard about TwinTech when researching new furnaces at furnaceprices.ca. After contacting them about my broken down furnace, Dave came to my house the next day to assess my situation and requirements for a new furnace. He recommended one that had stainless steel heat exchangers which sold me since my previous furnace had issues with a rusted secondary heat exchanger that had to be replaced. Dave also set me up with an appointment with an energy audit company so that I could take advantage of a rebate to help improve the energy efficiency of my home and get some money back. A few days later, Greg, Grant, and Mitch came to install the new furnace and remove the old one. When delivering and removing the furnaces, they were very careful not to damage my floors and walls, and even laid out red carpeting to protect the floors. They were very friendly and professional. The installation was completed in the time they said it would take and they cleaned up their work areas. Within a week, Dave called to follow-up to see how everything was going. I have already recommended them to several friends and family members who may need new furnaces soon.
May 6, 2020
Twintech did a great job, from Dave the Sales Rep to the Office staff and The Professional Technicians who did the installation. They were professional, courteous, knowledgable and informative. From beginning to follow up we were completely satisfied with everything. Thanks Again. Sincerely The Laytons
May 5, 2020
Great product, great service, great follow-up. The Twintech Heating and Cooling arranged removal of my existing oil tank and they installed the new gas furnace Amana (made in USA). I am very happy with the final result and support I received throughout the process. My thanks go to the entire Twintech team for their professionalism, great communication and follow-up.
May 4, 2020
We've had Twintech provide us with work in the past, for an inground pool heater and required rough-in for a new gas stove. More recently they provided the same friendly, professional, timely and clean installation of our new furnace.