Check the following things:
- Reset the receiver by pressing the reset button and releasing it when you hear 1 beep
- Check for a good connection between the solenoid and the receiver (Aux port)
- Replace the magnetic coil if it doesn't switch. Tip! Only connect a new magnetic coil to the receiver.
- Press the ++ symbol on the remote control. If this doesn't switch the magnetic coil, replace the remote control.