The cost to fix a garage door that stubbornly refuses to close can range from absolutely free to over $200, depending entirely on what is causing the malfunction. Often, the fix costs nothing at all because the issue is simply a misaligned safety sensor. Homeowners can easily realign the photo-eyes themselves by gently adjusting them until the indicator lights are steady, or by clearing away debris or cobwebs blocking the invisible beam. If the sensors are actually broken or have severed wiring, a professional replacement typically costs between $100 and $150. If the door won't close because it has jumped the tracks or a lift cable has snapped, the repair becomes much more dangerous and complex, generally costing between $150 and $250. Additionally, if the limit switches inside the opener motor need to be professionally recalibrated, or if a stripped gear needs to be replaced to restore downward pulling force, you can expect to pay around $150 for a standard service call and labor.
