The Dish will start a new search every time you turn it on even if it is already on the signal. Leaving the receiver plugged in should be enough. The problem you might be having is that in the middle of the night Dish Network sends programming updates to your receiver that require it to toggle between satellites. If the system is constantly moving back and forth it is often one of two problems.
- The receiver is working off an old software version and needs to update. There should be a system info button on your remote or in your menu.
- The receiver’s check switch is not set up properly for your satellite dish and it is causing issues when the unit toggles.
To prevent the receiver from updating in the middle of the night, check your receiver manual for how to set the receiver to require it to prompt you for an “OK” to update. This should stop it from moving your dish in the night but may require you to spend a few minutes every few mornings updating programming.