How can I set limits for a Masterlift 850 Garage Door?
I've just installed a new LifMaster 850 belt driven automtic door opener, but I can't set the limits. Each time a try this as per the instructions, both automatically or manually I get the flashing light error message, (light flashes 10 times), and the opener doesn't LEARN the limits.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix general d.i.y.