Ticking coming from heater fan when the car is cold

[margeleept]

Hi, all, this is my first post and I'm glad this forum is here. I have a 2017 Outback and have recently noticed a faint, rapid ticking sound coming from the heater fan when the car is cold. As the car warms up the ticking gradually stops and is generally gone after about 10 minutes of driving, depending on how cold it is outside. It also stops immediately if I turn off the fan...don't have to shut down the whole climate control system, just the fan. Any thoughts about what this could be? Thank you!