AC makes a vibrating horn sound while car is idling

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Lucky001
Posts: 1
Joined: Wed Mar 28, 2018 7:41 am

AC makes a vibrating horn sound while car is idling

Postby Lucky001 » Thu Mar 29, 2018 5:14 am

Replaced the expansion valve, dryer and evacuated the system. Cools and operates great until the car is idling and it makes a noise like a fog horn. While this is happening the expansion valve and dryer are both vibrating at a high frequency. Mechanic replaced both parts again under warranty and it still does it?????
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bohica2xo
Posts: 296
Joined: Wed May 11, 2016 4:12 pm
Location: Las Vegas, NV

Re: AC makes a vibrating horn sound while car is idling

Postby bohica2xo » Mon Apr 09, 2018 10:12 am

On your 1987 Corolla FX16 with dealer installed A/C it is possible to put the dryer in backwards.

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