The short answer to the question do ultrasonic pest repellers work is there is no credible scientific evidence that suggests ultrasonic pest repellers work.
Ultrasonic pest repeller garage door opener interference.
Just install an antenna extension to correct the problem.
A cordless or cellular phone an am of fm radio or any electrical equipment that uses a radio signal to operate.
Sometimes the garage door opener antenna could be struggling to receive your signals perhaps because it is bent or misshapen.
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Aside from household appliance being housed near a cell phone tower or airports can also cause interference to your garage door opener.
Additionally in 2003 the federal trade commission demanded that one of the chief marketers of ultrasonic repellents global instruments discontinue their advertising campaigns.
This is often a quick fix.
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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.
After reading many interesting comments thought i should share my experience.
I have used two bigger ultrasonic pest repellent units black decker ep1100 a for last ten plus years for rodents and similar larger pests one in backyard and one in garage.
Finding the interference source there are several things that can be done to figure out where the interference originates.
Step by step process of elimination is the best way to determine what is causing the decreased range on the garage door opener remote.
Try straightening the antenna wire and then testing your garage door opener remotes to see if that fixes the issue.
Sometimes the problem with radio frequency interference stems from the garage door opener simply being installed in a metal building.
Occasionally the rfi is coming into the garage by way of the house wiring because many houses have the circuit breaker boxes near the garage door openers.
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Interference can be caused by any unwanted radio signal.