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Air conditioning unit is making loud noises when the unit is in use.

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Check the fan and see if it's hitting anything

Posted on Jul 30, 2009

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1 Answer

Car makes very loud screeching noise.


It could be that the air conditioning compressor clutch is not working properly. The clutch should allow the pully to freewheel when the air conditioner is not used.
You can have your battery tested at.an auto parts store, and you can test the alternator by removing a battery cable while the engine is running. The alternator is what powers all the electrical systems while the engine is running. If the engine stops running when the cable is removed, this means that the engine was running from the battery and not the alternator.
Your alternator or your regulator is bad.
Regulators are an internal part of alternators, unless its a pre 70's.car where they were a separate external unit.
Hope this is helpful.

May 04, 2016 | 2001 Pontiac Firebird

4 Answers

Loud Noise


Check if noise comes from compressor or from the unit . If it is from the unit is probably a fan bearing in need of replacement.
Check last pages of your manuals for service repair phone number.

Aug 02, 2008 | Dometic Rooftop RV Air Conditioner

1 Answer

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.

Jul 19, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Air conditioner fan is making a loud noise


1. Could be a caught foreign object between A/C (air conditioning) fan and cooling radiator, producing this loud noise.
2. Could be a damaged fan blade, mowing the cooling radiator.
3. Could be a loud noise comming from the fan's electrical motor.
4. Could be a broken off fin (small wing) of the cooling radiator, striking the A/C fan, producing this loud noise.

Jun 14, 2010 | Dodge Grand Caravan Cars & Trucks

1 Answer

Very loud clanging noises started while driving


Try to remove the belt for the ac and see if you still hear the noise, as it sounds like you may have blown the seal or bearing out of the ac compressor , not sure just a guess.

Mar 13, 2017 | 1984 Chevrolet Corvette

1 Answer

Roof air unit too loud inside; quiet outside.


When you say loud, do you mean as in airflow noise, or vibration like noise? I take it this is a ducted system as well. Does it have quik cool option on ceiling assy.?

Jul 28, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Our air conditioner unit makes a tremendous amount


Sometimes we need to just replace our old equipment.

Jun 30, 2009 | Heating & Cooling

1 Answer

Central air condtioner making beeping noise!


it means it has a fault. try resetting unit by switching circuit breaker off and on it might go away

Jun 04, 2009 | Amana ACD106R Wall/Window Air Conditioner

2 Answers

2003 Nissan Altima, Air condition makes loud noise when the unit is turn on. It slows down where u cant almost hear it after you turn the fan off.


When you put your A/C on, there is Vacum Motor or Solonoide, that increases RPM of the Engine to compensate the load of an A/C. If the vacum hose is leaking or raptured the RPM of Engine remain low and Engine Shakes. When you put the A/C on and the RPM of Engine Increases, but a little, then your Selonoide is working but not adjusted properly, so adjust it for the proper RPM of the Engine. Put all the loads on, I mean Head Lights and A/C on and then ajust the RPM.

Jun 02, 2009 | 2001 Nissan Altima

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