window will not open

A home owner from fruitport Mi. 49415 says:
My Andersen window will not open. If you give the window a little push from closed position it seems to work fine.
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Dave Sr. from SWISCO responded:
Your window could be out of square and is rubbing. You might need a carpenter familiar with Anderson windows to look at it. Check to see if there's any rubbing on the window sash or frame. Maybe you can file down the spot where it rubs, but remember you could damage the frame if you are not careful.
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