Wednesday, June 27, 2012

Why did my AC just stop working after a thunderstorm?


Have you had your AC just stop working suddenly and usually after a thunderstorm? You say it was working fine yesterday and now the outdoor unit doesn’t operate/come on. The indoor unit works fine though, but no cold air. Hmmm, call a service guy! We need our AC!

Your wires should not be burnt as above.
 
Sound familiar? This happens quite a bit and usually after storms and occasionally for no explained reason.

What may have happened is the motor/compressor start assist device (sometimes called a capacitor) has failed. When the device that looks like a small silver can has had a power surge delivered to it; it has an internal short and fails to operate  The top of the “can” looks like a “Jiffy Pop container that has popped up”. It has a noticeable bulge on top where the terminals are located. This device stores energy and helps the compressor and the fan motor start. When it fails, the motor and compressor may not have enough immediate power to start and will just hum. Over a short period of time; this can be harmful to the compressor and outdoor fan motor and cause them to overheat and fail permanently. Sometimes there is no visible damage and must be tested electrically by a professional HVAC technician or electrician. The capacitors can also weaken after time and become ineffective and need replacement.
This capacitor is showing the signs of being pitted and burnt.

These devices should last at least five years or more if they are a high quality part. Unfortunately, most of these devices (capacitors) that come from the manufacturers are of a low cost and quality variety and fail frequently.

What to do? If your HVAC professional tells you that the failed part is a motor starting device/capacitor, ask (if your technician does not suggest it) for an Amrad Turbo-200 device and or a surge protector. The Amard capacitors are more expensive, but are of a very high quality, are made in the USA, and have a 5-year replacement warranty. The surge protector adds another layer of protection against the unwanted electrical surge that may do damage to any of your electrical components within the outdoor unit.

A word of note: If you have an AC system that is less than 10 years old, check to see if you have a limited part warranty that will cover the part or a manufacturer’s part and labor warranty to cover the cost of the repair. If you just have the limited part warranty only, you will still be responsible for the dispatch, labor, acquisition, and processing fees associated with “free” part.

11 comments:

  1. This comment has been removed by a blog administrator.

    ReplyDelete
  2. Make sure that you keep a copy of your AC’s warranty. During the warranty period, if your AC breaks down, it will have to be serviced by manufacturer’s air conditioning service. You typically get a warranty of two years. It is important that you know these things, so that you don’t have to spend money for repairs.

    Brooke Harris

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  3. Good news for you if your system is still under the warranty. Fixing it then won’t be your problem because the manufacturer will be the one to cover all the repairs for your AC. Just make sure that your warranty is still valid, because the last time our AC broke, we took it to the manufacturer’s service center, but unfortunately, the warranty had expired a month ago. Well, they still fixed it, but they had to charge us for it.

    Darryl Iorio

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  4. A broken AC after a thunderstorm or a power outage is definitely a familiar scenario for a lot of homeowners. To prevent these unpleasant scenarios, it would be best to take some extra caution on your AC and other appliances at all times. One suggestion is to turn off your unit during thunderstorms. Your air conditioner is only susceptible to power surges when the unit is in operation, so it is a must to put out the power.

    Regards,
    Naoki Dieter

    ReplyDelete
  5. When your AC suddenly stops working, then the best thing that you can do is to call your AC technician. Don’t touch any part or even attempt to make the repairs yourself especially if you know nothing about AC repairs at all. Also, check its warranty. Who knows, maybe the broken part is covered by it. Take advantage of your privileges and save yourself some money.

    -Mechteld Abelli

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  6. A sudden stop means something is wrong. You can check it yourself, but it's more advisable to call an AC technician. Don’t use your AC until it is repaired by the technician. Also, ask the technician about the real condition of your AC. Is it old and already beyond repair? Weigh your options, and see if it's going to be more convenient for you to buy a new AC instead of having it repaired.

    -Georgia Fuller

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  7. A storm just came through, and knocked out the power for about 2 seconds. Then, when the power came back on, the A/C unit outside became very loud. So, I turned off the thermostat, waited a minute and turned it on. Then, the outside unit was now sounding normal, but no cold air was blowing inside. So, I turned off the thermostat again, and flipped the main a/c breaker off, then back on. This time, when thermostat was turned on, the cold air started again. No idea what happened, just glad it did!

    ReplyDelete
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