Garage Door Reversing Mechanism

If you’re like most homeowners, you probably don’t think of your garage door as a potential weapon. But you should. Garage doors are one of the heaviest objects in your home, weighing sometimes as much as 600 pounds, and they do cause thousands of injuries each year in the United States alone.  

While garage doors and garage door openers are much safer than they used to be, things can still go wrong. People can be careless about safety around them, particularly where children are concerned. They can also neglect important maintenance. 

One very important safety aspect on a garage door is the reversing mechanism. After several children were killed by garage doors in the early 1980s, the industry adopted standards by the U.S. Consumer Products Safety Commission requiring reversing mechanisms on all newly manufactured garage doors.  In 1992, those voluntary standards became mandatory. 

Now, every new garage door is equipped with a reversing mechanism which consists of two parts: 

Garage Door Opener – The garage door opener’s motor senses resistance, and reverses the door’s direction if a certain amount of resistance is met. 

Infrared Sensors – These are usually mounted on garage door frame about six inches high. If anything comes in contact with the sensors, the door won’t work. 

The CPSC recommends installing a new garage door opener if your existing opener predates 1982. CPSC also suggests checking the reversing mechanism every month to see if it is working properly. This can be done by placing a block of wood on the floor under the door. If when you operate the door, it does not stop and reverse at the wood, the mechanism should be adjusted or repaired. You could do this yourself using your operator’s manual, or you can contact a reputable garage door service technician.

Troubleshooting Garage Door Opener Problems

Garage door openers are relatively uncomplicated devices driven by an electric motor. This makes them fairly easy to fix and fairly easy to diagnose when something goes wrong. Following is a short list of common garage door opener problems and how to fix them: 

Problem: The door opener does not respond to commands. 

Fix:  This usually indicates a power issue. Check to see if the electrical cord to the garage door opener is plugged in. Check also to see if the remote batteries are weak or spent. 

Problem:  The opener raises the garage door, but won’t close it. 

Fix:  This could possibly be the beam sensor. Make sure it is plugged in, and it is aligned properly.  

Problem: If the garage door opener runs, but doesn’t open the door. 

Fix: This may indicate a problem with the worm gear or chain sprocket, problems usually best fixed by your professional garage door opener repairman. 

Problem:  The garage door opener operates on its own. 

Fix: This also may be a problem best addressed by a garage door opener service company. Sometimes, it can be a simple solution such as a stuck button on the remote, while other times it may indicate a faulty circuit board, which may need to be replaced. 

Problem: The garage door opener opens the garage door, but then stops and reverses itself, or the garage door opener stops with the garage door partially open. 

Fix:  Most modern garage door openers have a safety sensor that forces the door to reverse if something is in the way. Check to see if the area is clear. Also, check to see if the sensor is adjusted in accordance with the owner’s manual. 

Of course, if you encounter a problem with your garage door opener and the problem persists, it is best to consult a professional. Garage door opener experts can either fix the problem, or replace the opener if necessary.

Garage Door Intruder Safety

One way intruders try to get in to a home is through the garage doors. While many improvements have been made in garage door openers to ensure security, some are better than others. There are certain features to look for and safety measures that homeowners can take to make sure that no intruders are able to enter their home through the use of their garage doors. 

  • Rolling codes. Newer models of garage door openers come with what are called rolling codes. This means they change access codes each time you use the opener. This is important to keep criminals from “grabbing” the code. If you have an older model, consider updating it or at least changing the manufacture code.
  • Remote controls. Never leave your garage door remote control in your car. If a thief breaks into your car or you have an unscrupulous valet or parking attendant, they may now have access to your home.
  • Lock the home entry door. This may seem like an inconvenience, but in case someone does get into your garage, you should keep the door to the home locked. It is worth having to unlock it every time to keep your home safer.
  • Unplug the door opener. If you will be out of town for a few days or longer, consider unplugging the garage door opener or use the vacation lock. Either should make the opener unusable while you are away. 

Automatic garage door openers are a wonderful convenience and something most of us do not want to do without. However, it is important to make sure that the convenience is balanced with good safety procedures and features.

 

A Primer on Garage Door Openers

If you’ve been shopping for a new garage door opener, you’ve no doubt been bombarded with a wide number of options. What you’ll find, however, is that the majority of openers fall into one of three main categories:  chain drive, belt drive and screw drive. Each has its pros and cons for the homeowner. 

Chain Drive: The chain drive garage door opener is probably the most common type of opener. It uses a chain, similar to a bicycle chain, to move a trolley, or carriage, that is connected to a metal arm, called a J-arm, that is connected to the garage door. This is the least expensive type of opener and the most reliable, but also the noisiest. As such, it is not the model to use if your garage is located under a bedroom. If the garage is detached, however, it is ideal. 

Belt Drive: This type of opener works basically in the same way as a chain drive opener except instead of using a chain, it uses a belt made of fiberglass, polyurethane or rubber.  Belt-driven openers are just as reliable as chain driven openers, but they are a lot quieter, making them ideal for built-in garages. The major drawback for belt drives is that they are usually more expensive, up to $100 more than a chain driven unit. 

Screw-Drive: The shaft drive opener uses a threaded metal shaft to connect the motor to the door. Since the shaft does not bend like a belt or chain, the garage door cannot be budged open, resulting in better security for the homeowner. This type of opener is also quicker, opening a door at up to a foot a second, compared to the average 7 inches per second of other types of openers. Cons with screw-dive openers are that they do not respond well to temperature extremes, hot and cold, and are noisier than belt drives. They are also the most expensive of the three types of openers.