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Whenver I use my AC and it starts its on off cycle, a loud whistle type noise is coming from underneath the front part of the car. Its not from the engine bay. Any ideas? It doesnt happen all the time, hence when i actually took it to honda haha.
 

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I had a noise like this on my old BMW and it was the expansion valve on the A/C system. The BMW dealer replaced the valve and the whistle noise went away.
 
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