Hi everyone. Just a bit of a random question about my 2024 Prius Prime SE. I spent a couple hours in the garage last night doing a rinseless wash. The car was off and not plugged in; additionally, the garage was about 45 degrees F. At some point toward the end of the wash, I heard a sound coming from the back half of the vehicle. It lasted several minutes and sounded like an air compressor, but more muffled (i.e., not quite as loud). The sound really sounded like it was coming from the area of the traction battery; at least it was loudest in that area of the car, the backseat/front of the cargo area. Any ideas what this mig it have been? I thought it could be the heater, but I also thought (perhaps incorrectly) that the heater only turned on when the Prius Prime was plugged in.
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