My liftmaster seems to shut down when the outside temperature is to hot but it will turn back on when the garage temp is cooled down

SOURCE: Liftmaster Garage Door Opener Problems...

The problem lies in the RPM sensor, most likely due to the interrupter cup assembly. The interrupter cup assembly is the black cap that runs through the RPM sensor. You may have forgotten to re-attach this piece or it is probably moving too far out when the garage sets in motion. To fix this, remove the cup assembly, unscrew the two screws on the top metal piece with a 1/8 allen wrench, push the metal piece as far in as possible and put the screws back on. This will give more room for the cup assembly to spin and be read by the RPM sensor. Hope this helps!

SOURCE: Chamberlain Liftmaster Professional 1/2 HP

Okay...upon further inspection, my left spring has broken in two. Going to call around for some quotes to replace the spring. Thanks for the suggestions.

SOURCE: Liftmaster garage door opens and

is there something jamming it travel of the door?
or does the travel distance of the door need adjusting?
How many remotes do you have?
do their batteries need a changing?
even with the power disconnected you should be able to close the door,
do this and check from there,
any of the switchs sticking down?

If it persists then call some one to fix it,
They are normally bullettproof if installed properly and servicing and lubracating them seems to be a good idea too,
some buildings shrink and contract more than others
Yours seem to be normal movement of the building structure.
winter and summer situtation.

check the adjustments on the travel,

Let me know the outcome thanks .....

SOURCE: Garage door shuts down, need to press reset to get it to work

On the side of the opener you will find the down limit control. Turn this a bit in the opposite direction of the arrow printed on the cover. You will probably have to tweak it a bit to get it just right.

SOURCE: Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+: outside keypad will not open garage door at all bu...

The inside button is hard wired. The keypad is a small radio transmitter. If the battery in the keypad is good and it doesn't work when you put in the code it has probably just quit.