I have a Liftmaster SDR2000, 1/2 HP Garage door system that was installed 10 years ago. During the recent cold spell, the Garage door would not open fully. However, on occasions, it would go all the way. Some more information:
* It's a screw drive garage door opener
* I'm able to disengage the motor and open the door manually with minimal effort
* When it does not open fully, it always stops at the same point, as if there is something stopping the screw drive mechanism. I used a step ladder to see if there is something on the center drive or the two sides but I cannot see anything that would block the mechanism
* I adjusted the upward force to maximum but that has not helped so far
No one would confuse me for Macgyver, but these days I need to save $$ when possible.
Any tips on where the problem might lie would be appreciated!