Goettl Air conditioning unit

AC Component Guide: Capacitors

While you may use your air conditioning system in Phoenix, AZ throughout much of the year, you likely are not familiar with many of the different components that actually allow that air conditioner to cool your home. That’s fine, of course. You aren’t a professional air conditioning technician, and this isn’t the type of material that most homeowners would choose to study for fun. Even so, we do think that it is beneficial to have a basic understanding of some of the important components of your home cooling system. The capacitors in that system, for instance, make it possible for your AC to operate reliably and successfully.

What Are Capacitors, and What Are They Doing in My AC?

Motor capacitors, including start and run capacitors, as well as dual run capacitors, are electrical components that store energy and put that energy to use when needed. Start capacitors, as you may have guessed, are used when your air conditioning system first starts up. Your air conditioner is going to require the most energy when doing so, which means that it may need a little help to get going successfully. The start capacitor boosts the starting torque in the motor briefly to get it over the hump, so to speak.

Just as a start capacitor helps your air conditioner to start up, the run capacitor helps it to keep running in a reliable manner. They ensure that proper, consistent levels of current are moving through the system, so that your air conditioner does not come grinding to a start. As you can imagine, a failing capacitor of any sort can spell serious trouble for your air conditioner.

If your start capacitor is bad, you may hear your system humming away, without actually starting up. Perhaps it will begin to start up, but fail before it has really gotten going. If your run capacitor is bad, you may hear your system start up, and it may even begin to blow some cool air, but it will cycle off before it should. This short cycling wastes energy and puts a lot of strain on an air conditioning system.

If you suspect the need for any AC repairs, remember that Goettl Air Conditioning is the company to call.


What Our Customers Say About Us

Gonzalo CastilloGonzalo Castillo
17:20 13 Jul 24
Peter is very experienced and professional. He knows a lot and explains everything in detail.
John McCarreyJohn McCarrey
13:56 13 Jul 24
Excellent service!
Gary StapletonGary Stapleton
02:37 13 Jul 24
I called Goettl to get a second opinion on a/c repair options or replacement. Peter Medelez conducted a very thorough system check and confirmed all the same issues previously identified but found an additional issue; tipping the scale to full replacement. We appreciated his professionalism and knowledge: answering all our questions and explaining the issues and options. We ultimately chose Goettl for the replacement option due to their price and professionalism.
James KroppJames Kropp
17:19 09 Jul 24
It was great
Robert WilliamsRobert Williams
17:06 09 Jul 24
Peter was great! Explained every detail I needed and answered all my questions!
Gustavo EscobarGustavo Escobar
16:57 09 Jul 24
Jesus Gloria provided exceptional service as the Goettl Technician this past weekend. He demonstrated great attention to detail in addressing the issues with our air conditioning unit and resolved them quickly, within 30 minutes. Jesus has a strong dedication to his profession and the company he represents, as evidenced by his professional demeanor and the quality of his work. His customer service skills are top-notch, earning a 5-star rating from us. We were so impressed by his service that we have decided to become members of the Goettl service.
Jesse Vann, JrJesse Vann, Jr
15:19 09 Jul 24
Jehad and Cameron provided great recommendation and customer service for my AC replacement.
Reda MoxleyReda Moxley
15:08 09 Jul 24
17:04 01 Jul 24
Got exactly what we needed with the service and had great customer service from Tyler for our plumbing and with Jehad for our AC work. They were awesome! Thanks!
Donna OwensDonna Owens
15:51 01 Jul 24
Rudy came out and was very professional and addressed our plumbing needs in a timely manner, highly recommended.
Neuro NerdNeuro Nerd
15:06 01 Jul 24
William and Cameron were knowledgeable, friendly, professional, respectful and put on plastic booties over their shoes when they came into the house. Our pets were comfortable with them and that says a lot. We will definitely ask for them again in the future if our AC has any issues.
Karen PardoKaren Pardo
14:55 01 Jul 24
Jehad did an amazing job after checking the entire unit he came down and thoroughly explained everything that needed to get done/replace.
Kelly MoserKelly Moser
17:01 27 Jun 24
Matthew was on time respectful and very curious. He explained everything I needed to know and I felt no pressure to buy additional things. Thank you Matt .
Dusengimana ErnestDusengimana Ernest
15:49 27 Jun 24
Jesus gloria did great. Wonderful
Nick LoprzNick Loprz
14:39 27 Jun 24
Charles JeterCharles Jeter
22:12 26 Jun 24
Kimberly FordKimberly Ford
21:34 26 Jun 24
EXCELLENT CUSTOMER SERVICE!! Jesus Gloria provided AC maintenance today providing with photos and video of his findings and a thorough explanation of any issues found. Richard Wenzlaff and Junior also came out today for the plumbing maintenance and also provided EXCELLENT CUSTOMER SERVICE. I have very clean water. They checked out my water heaters, water softener, osmosis, etc…no issues were noted! Three AWESOME, hard-working, thorough gentleman! Professional and courteous! Thanks guys! Appreciate your hard work and honesty!
Music by JuanMusic by Juan
17:47 19 Jun 24
Supreme service.
Erica RussellErica Russell
17:16 19 Jun 24
Awesome experience. Jesus Gloria was very friendly and informative and solved the problem quickly.
16:06 19 Jun 24
Josh was amazing! He was personable, polite, professional, and he walked me through everything he was doing and looking at. If I could give him ten stars I would!