After having my car serviced at Halvoline Xpress Lube it immediately made a noise when I turned on the heater / vent.
It sounds like “grrrrrrrrrrr” and there is a vibration in the dash and a little bit of vibration in the steering wheel.
It feels like the car pulls a bit when I have the vent turned to the highest setting.
The higher I turn the vent, cool or heat, the louder the sound.
The work they did was:
-pulled out two filter to show me the condition then put them back
I took it back a couple weeks later, they checked the filters, said they were fine, checked stuff, I don’t know what but they seemed earnest in their efforts. They took the glove compartment apart and poked around. They couldn’t understand how it was related to their work and suggested I go a mechanic and keep them posted.
It’s either an amazing coincidence that when I pulled out of their garage my car developed a problem, or that they did something goofy and don’t know what it is.