The heater fan vibrates when turn on the higher the speed the more the vibration-my question is how do i access it the adjust it or tighten it to get it running smooth as is is off kilter ---thanks ken
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There are several problems associated with vibration, the most common being tire problems. If your tires are not properly balanced or are improperly inflated you will get a vibration, especially at higher speeds. If the vibration lessens or stops at lower speed, this is the likely cause and the least expensive to fix. If your tires need balancing be sure to have them dynamically balanced. This method mounts the tires on a special machine which spins the wheel at highway speed and determines accurately where the balancing is needed. The least accurate balancing method (static balancing) is not very accurate and may not fix the problem.
If your car tends to pull to the left or right when you apply the brakes, the problem may be due the front end being out of alignment. You can have a mechanic check the alignment and make necessary adjustments for about $50.
I've experienced a rapid frequency vbibration that sounds like it comes from the front left dash. I isolated it as the small plastic molding on the outside of the windshield, just below the windshield. There is a small plastic strip like molding piece that ends near the end of the windshield. I used some double sided foam tape sandwiched between the bottom of the molding and the plastic piece belwo it and that solved the problem. I have had to replace the tape every year or so
That vibration is caused by something lying in the fan. This causes an imbalance in the fan that gives off the vibration. You will have to remove the blower motor in order to get to the fan and clear the fan of whatever is stuck in the fan.