My blower on my swamp cooler is acting erractic.?

Question

When the fan is on and working it will suddenly blow very little air.

Answer 1

Run capacitor is weak causing motor to overheat.

Answer 2

Sounds like maybe a blower belt is loose. Remove the side pannels and behind the right or left one you'll see the belt.

If it flexes with a lot of slack unplug it and go get a replacement at an auto supply but tell them if you had a lot of slack or not. Too big will get you right back in the same boat.

Answer 3

If the belt is loose there is usually a lot of adjustment on it, so before replacing it, try loosening the motor mounts on both sides of the squirrel cage blower and swiveling the motor.  If you can't tighten it that way, get a new belt at Lowes, Home Depot or anywhere they sell evaporative cooler parts.  Yep, auto parts store should have them in the correct length also.