Problem 1 My Chamberlain door openers (both) open the doors partially and at random heights in cold weather conditions.
Problem 2 Both brackets which connect the doors attached to the openers have pulled away from each door. The panels have cracked from apparent metal fatigue. Is there a repair for this damage? Should there have been some type of mounting bracket to keep this damage from occurring? One more bit of information, a metal bar is attached to the top panel. The self tapping screws are offset by 1/8 in due to the fact that the bottom screw goes through this bar while the top screw in this bracket is directly attached to the top panel. This may have caused some flexing in the panel. Should there have been some reinforcement in the top panel to prevent this damage. FYI the doors are CHI.
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IF THE DOOR IS BALANCED TRY ADJUSTING THE SENSITIVITY.
THE DRIVE SHOULD BE LUBED WITH WHITE LITHIUM OR GENIE LUBE 2 TIMES PER YEAR TO KEEP THE UNIT QUIETER AND PREVENT EXCESS WEAR.
IF YOU USE THE WRONG LUBE - GREASE ETC. THE UNIT WILL GET GUMMED UP AND WILL HAVE PROBLEMS IN COLD WEATHER.
ONCE YOU ADJUST THE SENSITIVITY YOU SHOULD BE OK.
The easiest way to fix this would be to take the chain off the sproket with the door and the trolley in the down position. Next hit the wall button and pay attn. to weather the gear is turning clockwise, you want it to turn that direction, wait until the unit stops by itself, next put the chain back on and now you should be able to adjust the limits. otherwise you should call a local professional. They will usually service your door as well as fix your opener.
1.Check to see if the door is running correctly. A. Run the door down and pull the emergency release. See if the door will run easily by itself.
1. If it runs hard by hand try lubricating the rollers and hinges with silicone spray or some form of lubricant (not WD 40)
2. If the door is heavy and falls back to the ground, you probably have a spring issue (either broken or needs more tension) in this case call a professional door repair company in your area.
B. If the door runs fine then check the up force on your operator (the box that hangs from the ceiling and reads Craftsman). If the light(s) on your operator go from front and/or back, the force adjustment screw is on the back of the operator. If the lights are on the sides of the operator then the force adjustment screw is on the right side (looking from the back of the operator and facing the garage door). Turn the light blue adjustment screw with the up arrow to a higher number.