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Why does my air conditioner/heater fan only work on High?

Why does my air conditioner/heater fan only work on High? Our air/heater fan only blows air when it is set on high. It makes a hooting noise when it first starts like maybe there is something in the way. I have replaced the blower fan relay switch but that had no effect.

Asked by: Guest | Views: 224
Total answers/comments: 3
mcgyver89 [Entry]

Sounds like the fan bearing is failing.
mcgyver89 [Entry]

replace the blower and the resistor, but it still does not work any idea that can be more, fuse is good and the relay
mcgyver89 [Entry]

I find this answer this information very useful. This is what happened to me also.