There is a buzzing noise from the air conditioner when it starts
Probably a contactor buzzing as they age it does not pull in as tight as when new.
SOURCE: central air conditioner doesn't cool
Usually when a unit isn't cooling it is because one there isn't enough freon in the unit. Second there could be a compressor gone bad. Third there could be a circuit short out. It can be very simple and it can be costly. It just needs to be checked out by someone who has understanding in this area.Look for an affordable service man or company in your area whom most people may be using to come out and check it out for you. They would be glad to. They can let you know about what it might cost also. If you have understanding in this area you might do it yourself. I do most everything myself and it keeps alot of money in my wallet. But I have to take the time to do it.
Buzzing noise - contactor. maybe a bug got in the contacts or maybe the coil is bad but in any case if you replace the contactor the buzz will go away.
SOURCE: My air conditioner is on but not blowing cold air and buzzes
The compressor is not starting. The buzzing noise you hear is the compressor trying to start and then the thermal overload trips. When it cools it will try to start again. Could be a bad capacitor or the compressor is bad. These two units need to be tested to see which one is bad. A capacitor is inexpensive. If it's the compressor it will be cheaper to buy a new AC.
SOURCE: My central air conditioner makes a loud banging
no,check to make sure the pump is secured to frame,then stay by unit have someone turn the unit on and watch the pump.sounds like the pump is loose or a spring in side the pump has broken in which case would have to replace pump.
SOURCE: I need help with a buzzing sound in my air conditioner.
It is probably the compressor humming. They can make some funny noises especially on start for a while. If the unit is not cooling it may be the start capacitor or the comressor may be locked up.
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