Help, dashboard acting up while pushing car

hello, i have a 90 civic wagon with a b18b1 motor. i recently pushed the car and um the dashboard where the Hot/Cold bar stays, goes all the way down every time i push the car.. any suggestion what it could be? thermostat? wires?,etc
Comments
...and are you talking about the HVAC controls? Does that selector affect the temperature of what comes out of the vents when you are "pushing" it?