I had one break about a month ago. Mine are the center mounted style spring and I also went ahead and had them replace both of them. Cost $165.00 installed and took him about 30 minutes.
What is with all the weak garage door springs ?
My guy told me that they are designed to last at least 12,000 cycles. Seems like a lot until you realize that you run it up and down 4X per day. That's 8 cycles. That works out to just over 4 years. Mine had been in this house for about 7 years. Some days I run it up and down 8-10 times, sometimes none. I guess I just never knew that they were a consumable part of the garage door.