The noise is not constant, but every 20 seconds or so, it lets out a squeel that lasts for about 1 second. I checked the unit and the fan on the left side is spinning as it should. The noise is coming from the right. The noise started on one of the first cold night s of theyear. We are working the unit hard because our house is very drafty and without insulation for the next few days. It's set at 75 and only reaching 60.
2006-12-09 09:37:31 · 6 answers · asked by shamumusic 1 in Home & Garden ➔ Maintenance & Repairs
If you have a belt driven fan check the belt tension and for wear.
If a direct drive fan (Fan connected directly to motor shaft)
Check to make shure the fan is not slipping on the motor shaft. There are two set screw which lock the fan onto the shaft. These can be tightened with a small allen wrench (typical 3/32 to 1/8)
After that squealing is usually a sign that a bearing is in need of lubrication or is about to fail.
Many moderen roller(ball) bearings are "Sealed for Life" which prevents them from being lubricated in the field. However if your motor has grease fittings installed (One at each end of the motor) you may try gresing the bearings.
Once you locate the grease fittings look for a drain plug on the opposite side of each fitting. Remove these while grease is being added. Attach a grease gun to the grease fitting and add no more than 5 pumps of the grease gun handle. Replace the drain plugs and run the motor.
It is possible to add to much grease to a motor bearing which will either flow into the motor internals or cause excessive heat to build up on the bearing.
Smaller motors may have an oil port into which you add a few drops of oil.
2006-12-09 09:53:04 · answer #1 · answered by MarkG 7 · 1⤊ 0⤋
My guess, your contactor is bad. Of course, I haven't charged you any money, so that is what you are getting. A guess. Here is why I made that guess: Unless someone stuck a stick inside of your unit, it isn't the fan blade. You say that you can feel the noise while touching the unit, and that the sound reminds you of a solenoid. You know what a solenoid is, so I imagine that you would have been smart enough to see if someone stuck something through the top. The outside unit uses 110v and 220v. When you switch your thermostat to A/C, 110v travels outside to a thing called a contactor. Electricity carries magnetism. Magnetism is what causes the contactor to close. If the contactor is bad, it will click. I hate to say it because I paid for a course, but furnaces and A/C units are as simple to repair as dryers and washers. The beauty of heating and cooling is the certification that is required. Without the certification, you can't get the parts.
2016-05-22 23:41:00 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Check amp draw on the fan motor.
2006-12-09 14:38:27 · answer #3 · answered by Dawg 4 · 0⤊ 0⤋
The fan is belt driven and that belt needs to be adjusted (tension) or replaced.
2006-12-09 10:30:13 · answer #4 · answered by Anonymous · 0⤊ 0⤋
you probably got a bearing going out or the fan is rubbing the case every one in a while
2006-12-09 09:49:47 · answer #5 · answered by roy40372 6 · 0⤊ 0⤋
Could be a belt cracked.
2006-12-09 09:46:05 · answer #6 · answered by 420 5 · 0⤊ 0⤋