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What causes loud squealing noise when air conditioner turned on on a 2002 Toyota sienna van?
My 2000 Toyota Sienna van has the same problem. I think it has something to do with the alternator or a belt, but not sure how to fix it. Anyone out there that can help???
-Shalon
If it ONLY occurs when the A/C is turned on it is most likely the belt slipping. Usually because it's old and glazed over. However, if it squeals when either A/C or heat is selected it is most likely the blower motor needing lube or replacement.
To adjust/replace the belt (on my 01) the belt is tensioned using the alternator bracket. I would HIGHLY recommend changing the Power Steering belt while the main belt is off. it's not fun and if you are not mechanically inclined I would recommend having it done by a shop. An easy way to see if is the belt, is to have someone else turn on the A/C (with the motor running) while you listen under the hood. If the squealing starts when the A/C is turned on then it could be the belt. A temporary fix is belt dressing.
What else can I help you with?
How do you fix squealing brakes on a Toyota Sienna?
Change the brake pads. I have had good luck with PBR Deluxe and PBR Metalmaster. They are quieter and dust a lot less.
What causes Steering wheel occasionally to vibrate in 2001 Toyota Sienna?
get a wheel alignment
What causes your battery light to flash on and off in a 2000 Toyota sienna?
A failing alternator.
What causes the check engine light to come on in a Toyota Sienna?
Low fluid levels in engine.
How do you replace Toyota Sienna cabin air filter?
toyota sienna 2001
Where is the chassis number located in Toyota Sienna?
where is the classis location for toyota sienna
How do you replace a starter in a 2000 Toyota Sienna?
How to replace a starter in a 2009 toyota sienna
What size engine does the 2009 Toyota Sienna have?
The 2009 Toyota Sienna has a V6 engine.
What size engine does the 2013 Toyota Sienna have?
The 2013 Toyota Sienna has a V6 engine.
How many valves does the 2014 Toyota Sienna have?
The 2014 Toyota Sienna has 24 valves.
How many valves does the 2013 Toyota Sienna have?
The 2013 Toyota Sienna has 24 valves.
How many valves does the 2010 Toyota Sienna have?
The 2010 Toyota Sienna has 24 valves.
