2-Pole 40 amp GFCI replacement for electric range tripping
Look at the wiring on the connection block on the back of the range. Make sure that the neutral and the ground are not connected. If the neutral and ground are connected, the GFCI will trip.
The neutral and ground are not supposed to be connected on the connection block with a four wire cord and ground going all the way to the panel. Some installers aren't properly trained and will leave the neutral and ground connected on the back of the range.