Furnace Blower Motor Vibration

If the furnace housing is vibrating i d suggest tightening the screws on the housing.

Furnace blower motor vibration.

Unbalanced blower motor there could be something off balance within your blower causing the fan to make vibrating sounds when it spins. I want your advice on how to fix a vibrating furnace. Blower motor mount squirrel cage plenum filter too small or the furnace itself vibrating. Loose access panels and framing also.

Called starving the suction of the blower. It is not the ho. The circulation fan often is to blame especially if it is attached directly to the metal cabinet. Check the fan and motor for signs of dust or debris build up or any other kind of obstruction and clear it away to see if the problem has been solved.

Are the fins of the blower wheel filled with dirt. Installing an acoustic rubber pad under the furnace specially if it is sitting on concrete will damp the vibration you hear through the pipes although the blower fan and motor are the most obvious parts to check take a look at the complete unit. Sometimes if enough dirt gets in the squirrel cage it will cause the wheel to vibrate when running. The answer is a number of different bolt systems.

Loose parts are to blame for vibrating sounds from a furnace. Pipe brackets burner parts cold air returns access panels into the burner chamber and blower chamber or even the plenum itself could be loose. Easy fix pull out the blower disconnect the motor and clean the squirrel cage with hot water in a utility sink or garden hose outside. When one set of bolts begins to come loose it starts to vibrate as the furnace works.

Your initial assumption about load on blower due to new filter is valid. Furnace mounting refers to how the furnace and its components are attached together. If the merv rating of the filter is too high this will starve the blower suction and cause any minor vibration in the blower motor wheel assembly to amplify.