Window A/C units too noisy!?

I have 2 window A/C units that are old and very noisy. Everytime you tap them, the noise changes. I guess I need to make some sort of insulating frame for them so as not to vibrate off the window frames. But I'm sure they will still make other noises. Anybody have any tips on how to make them run quieter at night?

Window A/C units too noisy!?
Make the AC fitting tight by giving packing in the sides. If the budget permits get it overhauled. When the temperature difference outside inside is more AC has to do more work, Give rest.
Reply:Either get a new A/C large enough to handle the entire area or get central air (if it's your place). A new one will be less expensive to run. Sounds like yours have had their last days. You can probably find good prices on them since the summer is almost over.
Reply:There's a lot of possibilities. First, open them up and check for anything loose. Also check to see if either fan blade is wobbling or loose. Then check the motor mounts for the fans, and the compressor mounts. (While you have the unit opened, you should go ahead and clean both coils for better efficiency.) If all that fails to provide a solution, or at least the problem, then you may be better off to replace them. The new units are not only quieter, they're also more efficient.
Reply:over time the chassis inside the a/c itself actually starts loosening up , thats why when you tap on it the noise changes slightly.....because you jar the internal frame and it makes another section vibrate





theres not much you can do other then take it out of the window unplug it and take the outer cover off and see if there are any screws that you can tighten ,and see if the fan motor is a little loose , if not your pretty much out of luck








B.
Reply:Check all of the screws around the casing. Make sure everything is tight. It sounds like something is rattling. If that doesn't work you may need to check the fans inside the unit. It's not the compressor if tapping on it makes them quiet.
Reply:I'm in agreement with Barbra.





A/C are on sale in August. But hurry, they will be putting them away in September.
Reply:Turn it off





it is super quiet .





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