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Can I Replace Central ACs Capacitor myself?

Can I Replace Central ACs Capacitor myself?

An AC technician performing AC repair

One of the most often worn-out components in residential air conditioning systems is the capacitor. They normally last for several years, but if you keep the same air conditioner for longer than ten years, you'll need to replace them at least once.

A Plus Quality recommends avoiding any attempts to replace the capacitor yourself. The capacitor keeps a sizable charge even when you turn off the AC. If you touch it, you risk being electrocuted.

How do you know when a capacitor needs replacing?

Here are a few typical signs of a failing AC capacitor:

The AC isn't blowing cold air
One of the first indications of a problem that many homeowners see is an air conditioner that doesn't pump cold air. You should call in for expert assistance if the issue persists after turning your machine off and back on several times.

Exorbitantly high energy costs
The issue could be caused by an AC capacitor failing. The harder you make your air conditioning system work to complete the task, the more energy it will take.

A buzzing sound
As soon as your AC system starts up, please pay attention to it. Your capacitor may fail if your air conditioner makes a humming noise or starts slowly.

An outdated HVAC unit
For whatever cause, an old HVAC system will eventually quit functioning. If your appliance is more than a 10 years old and periodically refuses to switch on, the capacitor might need to be changed.

AC Shuts Off By Itself
Occasionally turning off on its own could signal that your capacitor is malfunctioning.

The AC Doesn't Turn On Right Away
Does your air conditioner occasionally take a while to switch on? This is another indication of a deteriorating or defective AC capacitor.

The AC Won't Start
A defective AC capacitor can cause your air conditioner's complete inability to start.


If you are unclear of exactly what to look out for but still find that your unit isn't running at top efficiency, contact A Plus Quality Inc, servicing Toronto & GTA. We have qualified and knowledgeable technicians ready to analyze the problem and provide prompt and practical solutions. Contact us now if you see any signs that the capacitor in your air conditioning system is beginning to fail.

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  • What is a heat pump?

    Heat pumps use electricity to move heat from a cool space to a warm space, making the cool space cooler and the warm space warmer. During the heating season, heat pumps move heat from the cool outdoors into your warm house and during the cooling season, heat pumps move heat from your cool house into the warm outdoors. Because they move heat rather than generate heat, heat pumps can provide equivalent space conditioning at as little as one quarter of the cost of operating conventional heating or cooling appliances.

  • 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.

  • 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.  

  • Most common Boiler Issues

    - Boiler fails to ignite
    - Low pressure
    - Strange Noises
    - Boiler is not responding to the thermostat
    - Cold Radiators
    - Boiler leaking or dripping
    - Boiler cycling very fast
    - Available Hot water but No Heat

  • 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

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