Okay so I’m n my driver side in park when my heat is on it makes a rumble noise and vibration under my feet

 

Okay so I have 2016 Jeep Cherokee makes a loud but not to loud rumble noise under driver feet almost like the floor it feels like but only when the heat is on also just Cosme back from a trip that was over 3000 miles in very cold weather single digit I’m thinking this is a heater core problem or some type of fan maybe melted or something it just doesn’t sound right

 

does the noise change when you switch from floor to defrost or vents? could be a bad bearing in the heater fan or just some thing tangle up in the hamster wheel thing.

 

i just tried it and yes the noise goes away nice I switch to defrost what does this mean and thank you

 

Also what is this hamster wheel we are speaking of can I reach it clean it out myself