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When fan is running it is noisy - Heating & Cooling

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Hi, normally when a fan motor starts to make noise, this is a warning that the bearings are worn, and the motor will give out after a period of time. Not knowing what kind of set up you have, a central system, or a wall or window unit and the age of the unit, makes it hard to tell you what you can check, so I will guess and give you some ideas you can do. If it is the indoor blower motor, check to see if it has oiler caps on the body of the motor, they will be on top at the front and rear of the motor. You will see these small round chrome or red plastic plugs that can be removed to oil the bearings. If not, it will have sealed bearings and they can't be oiled. If so, you can pick up what is called zoom oiler's at Orchard supply, or other hardware stores that have a telescopic spout that pulls out for long tight spots and give them several shots of oil. If the bearings are not real bad, this will help a lot. If not, you can have the motor checked to see if the windings are weak and the bearings are going and have it changed out, or try and live with this noise until the motor just dies out. If the noise is loud now, you may want to do this now. Hopefully you have oil ports. From what you have said, the motor is noisy, I would say you are loosing the bearings or they are dry and need oil if they are not sealed. Check with a good strong light, and make sure the power is off before you put your hands in there. This oil bottle is only a $1.19. Please don't forget to rate me on this as I know you will be kind to me. I will be here if you need my help if you decide to take this on your self. I can walk you through the process. You can reach me with my user name below. Please keep me posted on this.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor

Posted on Sep 04, 2010

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