We can't thank Mike's enough - they responded on an 'emergency' next-day basis, completely resolving the problem.
We'd installed a new GE induction-top range 3 months earlier (replacing an old Jenn-Air electric) - but it just quit in the middle of cooking dinner. Turned out the installers had plugged the new stove cord into the original 'unanchored' plug-end of the range circuit (permissable by code), and jostling the range into position had loosened that connection.
So Mike's pulled out the stove, installed that range circuit-end into a junction box solidly recessed into the wall, replugged the stove cord into the new outlet, repositioned the stove - and all's great!
Thanks so much!