Re: Garage door opener too short range
No, this is not normal... And unfortunately, the range cannot be extended.
Sounds like you ended up with a weak signal there and you should try to erase all & re-program the HomeLink one more time. Especially if your transmitter is working by itself from 100+ feet.
While you might think that this is a wasted measure, you should definitely try these steps before you contact HomeLink or your Jeep dealer.
For a Sears or Lift Master GDO... What I would recommend doing is putting a fresh brand new battery in your original transmitter before you try this once again.
Yes, the new battery is important to beating this range issue.
Press the visor or overhead console HomeLink buttons 1&3 (the 2 outer) simultaneously for about 45-60 seconds until the small house red triangle-shaped LED indicator goes off.
This will erase all previously learned signals.
Press & hold the HomeLink # button of your choice + the transmitter simultaneously until the red LED indicator goes from blinking slowly until rapidly. You have now trained the Jeep.
If after this step the garage door does not work/move, then you have a 'rolling code' opener where you have the additional step to now have the opener learn the Jeep.
You now must push the 'Learn or Train' button on the back or side of the opener motor head where an antenna wire will be hanging down. That button will be green, orange/red, purple, yellow, or black and you want to push it once quickly to light-up the little LED near it. You now have about 30 seconds to go down the ladder and out to the Jeep & push the HomeLink # button that you just had trained... Keep pressing it until you can see the light bulb(s) in the opener motor head blink on/off which will signify that this learn process is completed.
Hopefully, this will take care of your weak, short range transmitting problem. Good Luck!