Frequenty Asked Questions (FAQ) Page

Answers to Frequently Asked Question:

  1. How long do springs normally last? It depends on the springs used and how many times the door is cycled. The industry standard spring is meant to last 10,000 cycles. A cycle is one opening and one closing of the door. If one uses the garage Monday through Friday, 10 cycles a week, the springs would last roughly 20 years. If two people are making two trips a day, 4 cycles a day or 28 per week, the springs will break roughly every three years. Garage door manufacturers tend to offer lifetime warranties on springs rated for 25,000 cycles or more.
  2. How do I determine the cycles on my spring. Three measurements are needed; the inside diameter, the length, and the gauge of each spring. With this information the calculator located at Service Spring Corp SSC will compute the cycle time. Unfortunately the standard deviation on the springs is not calculated and is unknown even to us in the industry.
  3. How do you determine the springs to use? Personally I weigh the door with a standard bathroom scale. Then, knowing the height of the door, consult the table on this website to determine the best springs to use.
  4. What cycle springs do you use? Most of the metal doors in Southern California take a combination of .207 and .218 springs. So most of the time we are using springs rated for about 37,000 cycles. At worst the very heavy wood doors may require our .250 gauge springs which are only rated for 13,000 cycles.
  5. Which Genie transmitter do I need for my opener? Genie has been around for many decades. Often in the Sun City area we find Genies that are 30 years or older and still working fine. Unfortunately the transmitters for those old openers are no longer made. If the opener was produced in the last 15 to 20 years the Intellicode Transmitter is what's needed. This can usually be verified by removing the light cover and looking for a little black button that when pressed causes a red light to blink twice per second next to it. If this is not the case then look for 9 or 12 dip switches. Little switches set with a paper-clip. On some older Genie openers the receiver is in a separate box located a few feet away. Follow the wiring going to the four posts in these cases to find the receiver. These openers require the Genie GT-912 Transmitters. Approximately 99% of all Genies use either the GIT-1 or GT-912 Transmitter.
  6. Which Liftmaster / Craftsman / Chamberlain transmitter do I need for my Opener? There are four basic transmitters.
    1. 371LM for 1996 or so to present.
    2. 971LM for 198? to 1996
    3. 81LM for 198? or so to 198?
    4. 61LM for very old openers.
  7. Why is the transmitter not working from the street any longer? Try another transmitter. If they are both not working from the street then check the batteries. If all transmitters only work from the same distance then the problem could be the receiver or interference. Typically interference comes from recently installed Verizon FIOS equipment. This can be easily checked by turning off the Verizon FIOS box and testing the transmitters again. However if this is not the case then the receiver must be replaced.
Site Map