Capacitor Failure Symptoms are sometime harder to identify without the right tools and expertise. Capacitors can be found in several different sizes and shapes. There may be one or multiple capacitors included in your ac with regards to the design. While the most popular capacitors are the types found on circuit boards, the ones most associated with air conditioning will be the bigger capacitors that assist start and run your motors. There are several motors present in an conditioner and heater systems: Compressor Motor Run Capacitor: Here is the most popular capacitor that fails. Most of the time these are duel capacitors, which means that there are 2 capacitors built into one. A duel capacitor will have three terminals on the top where a single capacitor will simply have two terminals on top. Outside Fan Motor Run Capacitor: That is the smaller capacitor found with or part of the Compressor Motor Capacitor. It helps start and run the outside fan that blows air through the outside coils.

Indoor Blower Motor Run Capacitor: Similar to the outdoor fan motor capacitor, it is a small, single (two terminals) capacitor that will help start and run the indoor blower motor. Start Capacitor: Some models include an auxiliary start capacitor that helps jump start the motors. Most are found on the compressor. These are less common. Why do capacitors go bad When capacitors go south, they either go out entirely or they decline in strength. The decline is measured in the “capacitance” units called micro farads. When the capacitors are produced, they are labeled with their specifications capacitance and a range +/- from the design capacitance. This range is the allowable operating range, usually labeled in a percentage range, for the capacitor. If the capacitor starts to fail, the capacitance measured will be outside of the labeled range. Sometimes these are difficult to find any symptoms unless you have the proper tools. Warning, there is a risk of severe shock, so do not try this at home.

Diagnosing a bad capacitor If a capacitor goes out completely, or is severely out of its operating range, it may prevent the motor affiliated with it from running completely. air handling unit installationIf the compressor motor is not working, then the air conditioner will not cool. heat and ac unit all in oneIf the outside fan is not working the compressor may cause problems and will short cycle or cease working. hide a window air conditionerIf the indoor fan stops, you’ll find that there is no air blowing through the vents. For Quick, Honest and Affordable Service, call Alexander Heating and Air Conditioning Raleigh Air Conditioner Repair Holly Springs Air Conditioner Repair Rate this:Share this:Like this:

Answers to your HVAC QuestionsCommon Air Conditioning Problems Common Air Conditioning Problems Air conditioners can fail at any time without warning. If you live in a climate that’s as hot and humid as Atlanta’s, you are asking a lot of your air conditioner!  You probably know since living in this warm climate that any air conditioner outages can result in significant discomfort rather quickly. Many air conditioning problems are a result of insufficient maintenance.  The easiest repair is one that’s avoided altogether by keeping up on regular maintenance check-ups.  In fact, if you haven’t been keeping up on your maintenance and notice your air conditioner starting to slack, a maintenance check-up may be just what you need to get your air conditioner back up to speed.  Some common problems homeowners experience that go beyond regular maintenance and should have checked out include: the compressor failing to turn on, the air not coming out cool enough, low airflow, and leaks.

Below are some ways you can diagnose air conditioning problems, descriptions of some common problems your air conditioning system may experience, and some special issues you should know about the refrigerant (freon) in your system. Ways to diagnose a problem: Check fuse box or circuit breaker.  First thing to do if your air conditioner is not functioning properly is to check the fuse box or circuit breaker that services the unit.  The fuse may need to be replaced or the circuit breaker reset. Air conditioner turns on and off frequently.  The compressor and fan controls may be worn out. Unit turning on but not cooling.  If your unit is turning on, but the air isn’t cooling efficiently, your refrigerant may be low.  You may also need to clean off the evaporator or condenser coils by brushing them off or vacuuming them.  In addition, the filter may need to be replaced.  Clogged, dirty filters block normal airflow and reduce a system’s efficiency considerably.

Dirty air filters and/or closed or obstructed supply-air and return-air grilles may cause insufficient airflow through your system.These are usually associated with low refrigerant or a clogged drain pipe.  Clogs can be fixed by clearing out the clogged pipe within the evaporator coil pan.  Leaks should always be handled by a professional HVAC contractor. Common air conditioning problems:If your air conditioner is low on refrigerant, either it was undercharged at installation or it leaks.  If it leaks, simply adding refrigerant is not a solution.  A trained AC technician should fix any leak, test the repair and then charge the system with the correct amount of refrigerant.  Remember that the performance and efficiency of your air conditioner is greatest when the refrigerant charge exactly matches the manufacturer’s specification, and is neither undercharged nor overcharged.  In addition, refrigerant leaks can be harmful to the environment.If you allow filters and air conditioning coils to become dirty, the air conditioner will not work properly, and the compressor or fans are likely to fail prematurely.

Electronic Controls and Sensors Failure.  The electronic controls and sensor that cause your air conditioner, fan and condenser to kick off and on properly are often the first components to go.  Sometimes these sensors are merely knocked out of position causing the air conditioner to cycle constantly or behave erratically.  Fortunately, problems of this nature are easy to address compared to larger mechanical failures, and won’t cost you nearly as much. Fan and Condenser Failure.  Fan and condenser failure, on the other hand, can add up to some pretty pricey repairs.  Replacing burnt-out fan motors is usually worth the expense in order to get your air conditioner up and running again, though a failed condenser can be a different story.  A new condenser is the most expensive AC repair in the books, and depending on the age and efficiency of your current air conditioner, it might be a smarter investment to just upgrade to a newer unit. Special Note About Air Conditioner Refrigerant (Freon): Contrary to popular belief, air conditioners do not consume refrigerant (freon) as a car consumes oil, so under ideal conditions it would never need changing or filling. 

Therefore, a low freon level indicates a leak which should be repaired before adding more.  While most new system connections are welded to minimize leaks, many older units (8+ years) were connected with mechanical flared fittings, which can vibrate loose over the years, causing leaks. Problems with freon leaks: Low freon levels reduce efficiency of the air conditioner. They can freeze the evaporator coil, causing it to literally ice up. Freon is an Environmental Protection Agency (EPA) controlled substance, deemed hazardous if released into the environment. The heart of the unit is the compressor, which is cooled by the refrigerant.  Over time, low freon levels can cause overheating and premature failure of the compressor, often requiring complete replacement of the compressor or the entire condensing unit.  As mentioned earlier this is a very expensive proposition. Always contact a HVAC professional when dealing with refrigerant (freon). Join our email newsletter