The torsion springs on steel rolling doors work the same way as other torsion springs in the garage door industry. When the door is closed, the spring is wound. The spring is secured to a spring anchor bracket on one end and to the shaft on the other. When the steel rolling door opens, the spring in the barrel supports most of the door weight. The remainder of this weight is lifted by the chain hoist or the operator.
The low rating on the CS is due to the fact that inwas out of town and my wife called because the garage door wouldn't open. We had repairs to the only other exit, and the CS said because it could be opened manually, it was no emergency. She was stuck in the house for over Sixteen hours. No emergency crew came out. Steve, a tech who came out the first time, fixed the door. It is not his fault CS took their sweet time to help a 45 year customer. I commend Steve. I do NOT have anything good to say about CS.
I give Chamberlain credit for trying to make the install easy. Considering the different operating environments and variables, it’s a challenge to cover all the bases. Unfortunately, a quick start guide simply isn’t enough in this case and the online instructions are no better. They have made some assumptions about what you need to know (or don't need to know). The above precautions should be spelled out to avoid customer frustration and reduce the number of calls to their help desk (and returned product).
Traditional One Panel: These doors consist of one large panel which tilts to open by employing a spring mechanism to swing upward. The wood version is popular in the South and Southeastern US, where a milder climate keeps the wood from rapidly deteriorating. Traditional garage door designs include Cape, Colonial, Ranch, Tudor and Craftsman. The disadvantage is these doors require a lot of clearance to operate correctly. Sometimes repairs can be difficult because of the heaviness of the door or its inaccessibility. Average cost to repair tilt-up doors is $172.
Step 1: Check the metal tracks inside the garage. Look at the mounting brackets that hold the tracks to the walls. If they're loose, tighten the bolts or screws at the brackets. Working inside the garage with the garage door closed, examine the tracks for dents, crimps, or flat spots. If there are any damaged spots, pound them out with a rubber mallet, or with a hammer and a block of scrap wood. If the tracks are badly damaged, they should be replaced.
After working on the car, you find a big oil stain on the driveway. Pulverize a scrap piece of drywall with a hammer (any new home construction site will have dumpsters full of waste pieces of drywall). Crumble the pulverized drywall with your hands and sprinkle on the stain. Leave it overnight, and rinse off in the morning. Reapply and brush in with a bristle broom in cases of stubborn stains.
Called on a Sunday just to get your hours and the phone was answered....took our information, found a convenient time slot, sent a confirmation email with techs name and photo...this part could not be better. Barry C. showed up, explained everything (problem, solutions, time to repair, etc.), provided options and costs for each option and saw my level of interest so allowed me to see how the repairs were completed. He mentioned it would take about 30 minutes to complete the job. I decided to finish trimming two shrubs, because there is no way that job could be finished in 30 minutes. Well, I came back and he was down, WOW. He explained exactly what he did, which was exactly what he thought he would need to do. Barry C. was very polite, knowledgeable and efficient. This part could not have been better. Overall, the experience was perfect. It costed more than I expected, but the warranty, technician skills and quality of the product; well worth money.
The power to your garage is out with the door shut, and you need to get your car out or you'll have to take a bus. You'll notice a cord—usually with a red handle—dangling down from the guide track that the opener uses to open and close the door. This is the manual override. Once pulled, it allows you to open and close the door with your own power in the form a little elbow grease.