Doesn't the blind metal rollin shutter of your shop with motor installation open?
They are usually stunned due to lack of grease and deteriorating the engine and losing strength and so they could not go up or down, you have to perform grease maintenance from early age, one of the cheapest systems to clean the lanes is to take a brush. Give it every day or one day and one day not with diesel. After two weeks a clear improvement should be appreciated. If you do it properly you will avoid having to call a specialist frequently. If you did not upload a day, check that it arrives current and if you arrive, at the same time you turn the rise key pulls it and will open.
