Step by step process of elimination is the best way to determine what is causing the decreased range on the garage door opener remote.
Improve garage door remote range.
Step 2 remove obstructions between the remote control and the door.
Replace the battery or batteries in the remote control.
I need to be extremely close to the garage door in order for the opener to work from the car and i suspect this is the reason that auto opening does not work for me.
If it does not improve then it is likely that the interference is being cause by an electrical component in the garage.
Place a stepladder at the area of the garage door.
Many modern garage door openers have an antenna that s attached to the casing.
Test the range of your remote control.
This antenna is long and functions well during typical situations.
Power down all circuit breakers except the one powering your garage door opener.
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However you can modify its range by wrapping it with bell wire.
If the range improves then you can determine that the device causing interference is not in the garage.
When attaching the wire ensure that the metal components are linked up properly.
Many different electronic devices can cause radio frequency interference which will reduce the range of the garage door opener remote or cause it to work intermittently.
The batteries provide the power to send the signal.