Stop before changing force or sensitivity
Keep the travel path clear and stop repeated operation. Do not raise force, defeat protection, pull the release on an unsafe or raised door, or move springs, cables, brackets, tracks, or supports to make the opener continue. If the door is crooked, partly raised, visibly damaged, or moving unpredictably, keep everyone away and arrange qualified service. This guide does not provide a balance test for a door that may already be unsafe.