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AC Making Humming Noise Due to Bad Capacitor

AC Humming Noise: A Guide from Reliable Appliance & HVAC

Hey there, folks! Are you hearing a strange humming noise coming from your AC unit? Well, it’s time to call the experts at Reliable Appliance & HVAC! We’re here to help you with all your HVAC troubles, and that includes getting rid of that pesky humming noise.

Let us tell you about how we helped one of our customers, John Smith, from Sunnyvale, California. John called us because his central AC unit was producing an annoying humming sound that just wouldn’t go away. He was desperate for help, and we were just a call away.

Our team of experts arrived at his residence, and we got straight to work. The first thing we did was run some diagnostics to figure out what was causing the humming noise. We checked the filters, ducts, and other parts of the unit to ensure we ruled out any issues that weren’t related to the humming.

After running some tests, we discovered that the humming noise was caused by a faulty blower motor. We informed John about what was happening and provided him with a comprehensive quote that included parts, materials, and labor. We also gave him a detailed breakdown of the cost so he could see where the money was going.

Our guys then went straight to work fixing the blower motor, and within no time, the humming noise disappeared completely. We made sure to test the unit thoroughly to ensure that everything was running smoothly again.

John was so relieved that he left us a quote saying, “I was blown away by the swift and professional service provided by Reliable Appliance & HVAC. The team was so friendly and helpful, and the cost of the repair was very reasonable. I highly recommend their services!”

We were happy to help John and you know what? We can help you too.

What Is AC Humming Noise?

So, what is AC Humming Noise, and why does it happen? AC humming noise is a low-pitched sound that comes from air conditioning units. It’s usually caused by a vibration in the unit, which produces the humming sound.

The most common cause of AC humming noise is a faulty motor. The motor contains different moving parts, and if one of these parts is broken, it can create a humming noise. Damaged bearings, loose bolts or screws, and worn belts can all contribute to AC humming noise.

How Can Reliable Appliance & HVAC Help?

At Reliable Appliance & HVAC, we have a team of experts who can help you deal with your AC humming noise issues. We will send a technician to your location to run an inspection to determine what’s causing the humming sound.

Our technicians have years of experience dealing with different types of air conditioning units, so you can trust that they know what they’re doing. We will give you a detailed breakdown of what the issue is and provide you with an accurate quote for the repair before getting to work.

How Much Does It Cost to Fix AC Humming Noise?

The cost of fixing AC humming noise varies depending on what the issue is. At Reliable Appliance & HVAC, we always strive to give our customers the best possible deal.

To give you an idea, we have prepared a table outlining the cost of fixing a faulty blower motor for a random brand’s central AC unit. We’ve listed the prices for brand-specific parts that we use and the recommended labor charges set by the brand’s factory.

Part Material Cost Labor Cost Total Cost
Blower Motor $250 $250 $500

This table shows the total cost of fixing a faulty blower motor in a central AC unit for a random brand. Our team at Reliable Appliance & HVAC always uses brand-specific parts and the labor costs recommended by the brand’s factory. This way, you can be sure that your AC unit is running at its best and that you’re getting the best possible value for your money.


AC humming noise is a pesky, annoying problem that can be difficult to deal with. Luckily, you’ve got the experts at Reliable Appliance & HVAC to help you out! With our team of experienced technicians, we’ll make sure your AC unit is running smoothly again in no time.

We hope this guide has been helpful in answering your questions about AC humming noise. If you have any other HVAC issues, don’t hesitate to give us a call.

AC Making Humming Noise Due to Bad Capacitor
AC Making Humming Noise Due to Bad Capacitor
AC Making Humming Noise Due to Bad Capacitor

How to Prevent AC Humming Noise: Expert Tips from Local HVAC Technicians

Are you tired of hearing the annoying humming sound coming from your AC? We know how frustrating it can be to have a noisy AC unit. Fortunately, there are preventive measures you can take to avoid these issues. To help you out, we’ve gathered recommendations from both AC manufacturers and local HVAC companies on how to prevent AC humming noise.

Turn off Power Before Maintenance

Before you do anything, make sure to turn off the power source to your AC unit. Failure to do so can cause electrical shock or serious injury. This is a vital first step because you don’t want to damage yourself or your unit while performing maintenance. After turning off the power, remove any debris or buildup from the outside of the unit. This will help keep the airflow unimpeded and prolong the unit’s lifespan.

Clean or Change Your Filter Regularly

One of the primary reasons your AC can start humming is a dirty filter. A clogged filter can lead to restricted airflow and cause the AC to work harder than it needs to. This extra effort can create vibrations and the unpleasant humming noise you’re experiencing. HVAC professionals recommend cleaning or changing the filter regularly, at least once a month, to keep the AC functioning properly.

Check that the AC is Level

An unbalanced AC unit can cause it to function improperly and can lead to noisy vibrations. After installation, verify that the AC unit is level to avoid these issues. Consult your manufacturer’s instructions or local HVAC technician on how to properly align and level the unit. This is a simple measure that can prevent unnecessary problems and extend the unit’s lifespan.

Inspect Components for Wear and Tear

Over time, various components within your AC unit can wear down and require replacement. If your unit is suffering from humming noise, an experienced HVAC technician can look at bearings, belts, or other moving parts that may have worn out with time. For replacement and repair advice, call the experts at Reliable Appliance & HVAC at (866) 516-1222 for a professional assessment.

Service Your AC System Frequently

Like any other appliance, an AC unit needs regular maintenance to keep functioning without issue. To avoid humming noise, you should schedule check-ups from a qualified HVAC technician every year, preferably in the spring before the hotter months begin. This regular servicing can detect and fix minor issues before they turn into major and, as a consequence, eliminate AC humming noise.

In summary, there are several preventive measures you can take to avoid AC humming noise, and these may improve your unit’s endurance and lifespan. Remember to turn off the power source, clean or change your filter regularly, check that the AC is level, inspect components, and schedule regular check-ups with an experienced HVAC technician. By doing so, you’ll prolong your AC’s lifespan and enjoy quieter, more efficient operation.

If you’re experiencing humming noise or need seasoning maintenance, don’t hesitate to call the experts at Reliable Appliance & HVAC at (866) 516-1222 for the most trustworthy and reliable service in San Diego.

The Average Repair Cost for AC Humming Noise

Are you hearing a strange humming noise coming from your AC unit? It’s a common issue that homeowners face, but it’s not something you should ignore. That’s because the humming noise can signal a more significant underlying issue that needs repair, which can cost you in the long run.

At Reliable Appliance & HVAC, we know how frustrating and stressful it can be to deal with AC problems, especially when you’re not familiar with them. That’s why we’re here to provide you with the best professional advice on the average repair cost for AC humming noise issue.

Minimum and Complex Repair Cost

To give you an idea of what to expect, the minimum repair or installation cost could range from $250 to $400. However, assuming prices are up 20% now, you can expect that the cost may be higher.

On the other hand, the complex repair cost in the city of San Diego could be anywhere from $600 to $1200 or higher, depending on the extent of the damage to your AC unit.

Parts Needed

It’s essential to know that the cost of materials is a significant part of the repair cost. That’s why our technicians will inspect your AC unit thoroughly to identify what parts are needed and the cost.

Below is an itemized list of parts that could be necessary for your repair:

  • Capacitor
  • Condenser Fan Motor
  • Relay
  • Contactor

Why Call Reliable Appliance & HVAC

At Reliable Appliance & HVAC, we have over 35 years of experience in AC repair and installation. Our technicians are fully licensed, insured, and certified to handle all AC problems, including humming noise.

When you call us at (866) 516-1222, we’ll send one of our technicians to your residence to conduct a thorough inspection of your AC unit. They’ll diagnose the issue, provide you an estimate, and explain what parts are needed for the repair thoroughly.


If you’re hearing a strange humming noise coming from your AC unit, it’s essential to address the issue promptly before it turns into something more significant. While the repair costs may vary depending on the extent of the damage, it’s always best to call a professional to diagnose the problem.

At Reliable Appliance & HVAC, we’re here to help you make the most cost-effective decisions when it comes to your AC unit. Call us today at (866) 516-1222 to schedule an appointment with one of our licensed technicians.

AC Humming Noise: A Common Problem for San Diego Homes

As a homeowner in San Diego, you rely on your air conditioning to keep you and your family comfortable during the hot and humid summer months. When something goes wrong with your AC, it can be frustrating and stressful, to say the least. One of the most common issues that homeowners experience is AC Humming Noise. If you’re dealing with this problem, you’re not alone.

At Reliable Appliance & HVAC, we are familiar with this issue and understand how important it is to have a functioning AC in your home. As a family-owned and operated business serving San Diego since 1985, we take pride in our reputation for providing top-quality service and reliable repairs to our community.

What Causes AC Humming Noise?

There are several potential causes of AC humming noise. One of the most common is a faulty capacitor, which is a component that stores and releases electrical energy. Over time, capacitors can wear down or fail altogether, which can cause a humming sound to emanate from your AC unit. Another possible cause is loose electrical connections, which can also create a humming noise. Sometimes, the issue may be a simple fix like changing the air filter, but other times it may require more specialized repair work.

Trustworthy AC Repair

At Reliable, our highly trained and experienced technicians have seen it all when it comes to AC issues. When you call us with a problem, we’ll swiftly send someone out to your home to diagnose the issue and offer a quote for the necessary repairs. We only use top-quality brand-name parts, and our technicians always follow the factory recommendations to ensure that your AC unit is working at its best.

Fair and Transparent Pricing

We understand that AC repairs can be costly, which is why we strive to offer fair and transparent pricing for our customers. You can rest assured that the quote we offer will be reasonable and competitive, without any hidden fees or surprise charges. Plus, as a licensed and insured company with a 90-day warranty on all repairs, we stand behind our work and always strive for customer satisfaction.

Schedule Your AC Repair with Reliable Today

Don’t let AC humming noise disrupt your summer comfort. Contact Reliable Appliance & HVAC today to book your repair appointment. As a first-time customer, you’ll receive $25 off of your repair costs, and can trust that you’re in good hands with our experienced technicians.

FAQ: AC Humming Noise Due to Bad Capacitor

Q: Why is My AC Making a Humming Noise?

A: If your AC is making a humming noise, it could be due to a variety of reasons. One of the most common reasons is a failing capacitor.

Q: What is a Capacitor?

A: A capacitor is a small, cylindrical device that stores an electrical charge, which is used to start the air conditioning unit’s motor.

Q: How Can I Tell if My Capacitor is Failing?

A: One of the most obvious signs of a failing capacitor is a humming noise. You may also notice that your AC is not cooling your home as effectively as it used to, or that the air coming from the unit is not as cold as it should be.

Q: What Should I Do if My Capacitor is Failing?

A: If your capacitor is failing, it’s important to have it replaced as soon as possible. This is because a failing capacitor can cause other parts of the AC unit to fail, which can be costly to repair. Contact a professional HVAC technician to replace your capacitor.

Q: How Can Reliable Appliance & HVAC Help with My AC Humming Noise Issue?

A: At Reliable Appliance & HVAC, we have a team of experienced HVAC technicians who can quickly diagnose and repair any issues with your air conditioning unit, including AC humming noise due to a bad capacitor. Give us a call at (866) 516-1222 to schedule a repair appointment today.

Don’t put up with a humming noise from your AC unit any longer. Contact Reliable Appliance & HVAC today for fast, reliable repair services.