Spring finally snapped after many decades. Called someone in to replace the spring.
Backstory, the spring is 30+ years old. couple years ago I lubed up the spring with lithium lubricate and cleaned all the hinges and wheels and it has been working wonderful since then. The motor is just as old as old as my springs. The garage door we have is a wooden door. 9' x 8' x 1.25'' thick.
First Visit: Tech came out to measure my door and determine the correct type of spring required to replace the broken spring. During this visit we discussed at great length whether to install the same exact single spring or to install two springs. I wanted him to put the same exact spring and he pushed hard on 2 springs to due safety. After a day of me researching, I agreed with him.
Second Visit Tech came after 2 days with 2 new springs. Installed them while I was working around the house. After he was finished, he was testing the garage door and the door had issues moving all the way up or down with the motor. I'm not sure if he was able to push the door up and down manually, but he quickly said these springs are too strong and the side cables were loose. He said he would need to special order my springs. The problem he claimed was that he mis-measured my garage door. Which is kinda of bullshit because I measured the door for him and when he showed up the first time, he confirmed the spring and measurements.
Third Visit Tech came after 10 days with 2 new springs, and began quickly installing them. After he was finished. He was able to manually open and close the garage door himself, I witnessed this myself. But when trying to open and close the garage door with the motor it would not complete the cycle. I don't remember how it failed, but it did fail. I believe it would get 80% of the way then return or something. He instantly began to lube all the hinges tinker with the garage door thinking the issue was with my door somehow. He also did mention the springs he got were a couple inches longer or shorter than what his garage door measuring app indicated was the proper length. At this point he claimed the motor was too weak for my garage door and that the motor could have gone bad or weak once the spring snapped. The motor needed to be replaced.
Tech began claiming the motor we have is not strong enough to open and close the door properly, yet before the spring snapped, the motor was opening and closing the door just fine. He kept telling me the motor is too weak. Mind you he kept opening and closing the garage door to keep testing, so the motor is working. And on his first and second visit he never mentioned the motor was WEAK a single time or the motor could be an issue. I nicely asked him to remove the springs, put everything back the way it was, and I would have to think about it and discuss it with the family. Just to get him out of the house to do more research for myself.
Did he give me the correct type of springs based on the information above?
Or is the issue that after so many years my motor has gotten weak or so weak to the point it will not pick up or close the garage door anymore?
When pulling the garage door manually, does it matter how much force is required?
EDIT: I've put a lot more detail into my question this time around, I didn't think I would get such an overwhelming response.