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Why is My Outside AC Unit Making a Loud Noise? 

July 31, 2020

Why is My Outside AC Unit Making a Loud Noise? 

Metallic Clicking Sound: Debris
There are several reasons an outside AC unit is making a loud noise. The outside AC unit has a large fan that rotates beneath a spiral grate that is part of the unit's housing. The blades on the fan are relatively large with thick metal blades. If the grate on the housing also has large spaces, debris such as twigs, acorns and small branches fall between the grate and fan causing the fan blades to beat against the debris. The sound this makes is a metallic clicking as debris hits fan blades. If this is the case, turn the unit off and carefully remove the debris without damaging the blades or grating.  Should the debris be difficult to remove, you will need assistance from A-Plus Quality, HVAC services in the Greater Toronto Area. A certified technician will remove the grating from the housing and extricate the debris that is causing the loud noise. 

Screechy and Metallic Sound: Fan Motor
If the loud noise from the outside AC unit sounds more screechy and metallic, the fan motor may need repair or replacement. 

Squealing Noise: Fan Belt
If there is a loud squealing noise, the problem in this case may be the fan belt. When a fan belt makes a squealing sound, turn the unit off to prevent further damage and contact us. The belt will need to be removed and replaced by a certified technician from A-Plus Quality, HVAC services in the Greater Toronto Area.

Gurgling Sound: Refrigerant Leak or Condensate Drain Line
One other noise that occurs with an AC unit is a gurgling sound when the unit is operating. This may be due to a refrigerant leak or the noise is coming from the condensate drain line. With this problem, turn the unit off until an HVAC professional determines where the gurgling sound is coming from. If there is a refrigerant leak, this requires repair and replacement of refrigerant. 

How to Avoid Costly Problems with an Outside AC Unit
One of the most timely and cost-effective ways to avoid problems with an outside AC unit is regular maintenance. In addition, when you do notice a problem it is best to have a certified technician from A-Plus Quality, HVAC services in the Greater Toronto Area, check out the issue and make any necessary repairs. If you are having troubles with your air conditioner, contact us today.

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Client Testimonials

  • First experience was on New Year's Day, 2020, when furnace stopped. Called A-Plus and they had a rep (Jack) out quickly. He did some troubleshooting. He wasn't giving BS. Gave me options on repairing or replacing. Non-biased, no pressure. I chose replace and it was done the next day. Good experience all around. Second experience was early March, 2021 when a harsh chemical smell emanating from the furnace room, and pushed through the HVAC venting, permeated the house. Very concerning. Was late night, called A-Plus, immediately answered and suggested some safety moves for the evening. Booked a visit for the morning. Jack again came and assessed the issue and advised where the smell came from (outside). Again, very professional, quick, no BS, good guy. Completely satisfied with the service after often being given the BS treatment from other service providers for the house. Would definitely recommend.

    Daniel Colombo
    a month ago
  • A Plus Quality Inc were absolutely AMAZING! I changed my furnace, AC, and humidifier. They were quick, efficient, professional and did an outstanding job. I definitely recommend them to everyone!

    Paul D
    in the last week
  • From the moment we called A Plus, until our heat was restored, the customer service was excellent! Polite and caring over the phone. Considerate and efficient technicians at the service end. Highly recommend.

    sue casey
    a week ago
  • A Plus Quality did a wonderful job installing our new Carrier heating system and ecobee smart thermostat. The technicians were courteous, professional and followed the health and safety protocols in regards to Covid-19. Thank you for a job well done!

    Patri A
    in the last week
  • what an amazing company, very friendly well experienced in the trade. they have lots of knowledge and the take all percostion of covid when coming into my house. they are also very clean and get the job done right. I will definitely be going to them again. I highly recommend for everyone to use a-plus quality.

    Gianluca Altobello
    a week ago

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FAQ

  • How do I know what size unit I need?
    If you have any problems with your system, you should contact the contractor who installed the units. All our systems are covered by a 5 year parts, 7 year compressor limited warranty
     
  • Why should I maintain my Furnace or AC?

    An annual maintenance will extend the lifetime of your heating and cooling unit. The technician will diagnose and repair any problem with the unit before it fails, so you won't need to worry about any problems when the weather gets very hot in the summer or extremely cold in the winter.

  • What is a mini-split?

    By definition, and simply put, a “Split System” is a heating and air conditioning system which has two main components, the indoor unit and outdoor unit. In short, the indoor unit absorbs heat energy in the cooling mode, and the outdoor unit rejects the very heat absorbed by the indoor unit. And the cycle is repeated until the set temperature is met. Although the indoor and outdoor units are located in physically different, hence “split” locations, they are connected and operate as, one system; continuously circulating refrigerant liquid and vapor by means of interconnecting, dehydrated copper refrigerant lines, commonly referred to as a “Line Set”.

  • Water is Leaking on my Furnace

    Water falling on to the furnace can harm your heating unit by affecting the control boards and other components enclosed in the furnace. There can be many causes to the water overflow, but the most common cases in the summer is the ice build up inside the evaporator coil due to low refrigerant level. Water build up can also be due to the evaporator coil having a crack on the base, if this is the case contact us by booking an appointment or call us today to have a technician come have a look at your unit and repair this issue before it causes excessive damage.  

  • What are mini-split advantages?

    Just as the name implies, a “mini-split” system is a “split system” however available in smaller capacities, for single room to whole house conditioning. Mini-split systems may range from as small as 9,000 BTUh per hour, comparable to say, a small window AC unit, for individual room use, up to 4 and 5 ton capacities for “Room By Room” (also known as “Zoning”) and whole house conditioning. With near universal design, mini-splits are “heat pumps” which provide both heating and cooling for a home. Here are key advantages when compared to traditional split systems:

    Efficiency- Mini-splits are highly engineered systems which offer attractive operating efficiencies, in many instances, eligible for utility company rebates.
    Heat Pump- Most mini-split systems are heat pumps, providing year-round comfort.
    Solar friendly- Due to very low power requirements, mini-splits are an ideal complement to “Net Zero Energy” homes, or any home using renewable power.
    Carbon footprint- Mini-splits are 100% electric, with zero operating emissions of any type.
    Zoning- Most mini-split manufacturers offer systems capable of room-by-room “zoning”, to account for peak demands of a room based upon construction type, exposure orientation and usage.
    Variable capacity- Mini-splits are typically DC inverter driven. That is, a variable speed compressor which modulates in proportion to instantaneous demand. Most conventional split systems, by comparison, operate with an ON-OFF strategy. (Would you use an ON-OFF switch as the accelerator in your vehicle?)
    Location, Location, Location!- Mini-split outdoor units are compact; they can be located far away from noise-sensitive areas, such as bedrooms and home offices. Mini-split indoor units have the ability to be installed where conventional systems cannot.
    They’re perfect for additions and remodels where access to current HVAC system is difficult to access.
    Modern mini-split systems are remarkably quiet; in fact, many times their operation is unnoticed by the end user.

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