Can't help but notice that one of my AC's is getting noisier (deeper rumbly hummy sound) and is buzzing. Still cools great. Voltage is well within tolerances. Any ideas. This only happens when the compressor is running. Fan sounds fine.
One thing that I have found with all air conditioners and refrigerators is to clean them and they will be quiet and work better.
Take a garden hose to the A/C outside coil. Don't really drench it, but just spray it off for a few seconds. Also remember to clean the indoor air filter once in a while. Just 4 screws to remove, then you can get to the air filter, rinse it off and put it all back together.
I have a voltage meter that stays plugged into the wall all the time. If it is above 110 volts, I tend to ignore it, but if it reaches 108, I watch it more often throughout the day. If it reaches 105, then I will usually turn off the A/C until it gets higher. If it goes up 4-6 volts or more when you turn off the A/C units, then check the RV power plug. If it is hot, then ask for another site without a broken plug.
The receptacles get worn out and the brass terminals get weak, and when the terminals don't hold onto your plug it will get hot. Mine saw a 10 volt drop once with about 15 amps going through it, so there was 150 watts being consummed by the bad receptacle, acting like a little heater making the cord very hot.
Usually if my voltage reaches 110 volts and it is hot out, I will use my voltage booster. It bring up the voltage by 12 volts.
Fred.
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The compressor is mounted on rubber. Some are held on with a small hitch pin. Look to see that one of the mounts came loose or missing a pin.
Rich
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Will check out all the above suggestions. Thanks. It is definetly a pronounced vibration type drone although it's more of a hear it than feel it thing. I'll take the cover off this weekend.
Washing an air conditioner is not going to have any effect on a noise or vibration other than a dauber nest on the fan blades, and if it's been running recently, you can cross that one off the list. Remove the cover and with the unit running try to move metal parts and tubing around to see if it will stop. An imbalance on a fan blade would have probably shown up at the start. If you don't find any mechanical vibration, you have a noisy compressor. It's common as they get older..
I have seen this with a camping buddy's A/C. Check to make sure there is nothing loose with the compressor or where the unit is mounted to the roof or that a mud dauber has not been building a nest on the fan.
John & Angela wrote: Thanks Bob. Can anything be done if it is the compressor?. rebuild etc.
No, the compressor is hermetically sealed and the only cure is replacement. You'll probably find it's cheaper to replace the unit, rather than have a tech fix it, especially if you can swap it out yourself. Personally, for the cost of a new unit, I think I could get used to the vibration..
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