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Noise when ignition turned on

845 Views 2 Replies 3 Participants Last post by  Keifer724
Anyone know what the noise that sounds like a small fan motor or pump running is when I turn on my ignition only ac is off but this sound runs for like 5 sec then stops also does the same when I turn off truck
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Did you ever figure this out? I’m having the same exact problem. It also happens when my truck is running and I turn my temperature knob. They’re two very distinct sounds. One when I turn the heat up, and one when I turn it cooler. Also, my heat doesn’t work. It blows cold A/C at all times
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