A:Answer Hi there. Thank you for reaching out to us. We understand your situation regarding the recommended distance between your LG MHEC1737F over-the-range microwave and your cooktop. For safe installation and optimal performance, LG recommends a minimum clearance of 30 inches between the bottom of the microwave and the cooktop surface. As a troubleshooting step, please refer to the installation manual to ensure proper ventilation and safety guidelines are followed.
https://www.lg.com/us/cooking-appliances/lg-mhec1737f-over-the-range-microwave#pdp_specs
If you need further assistance, please send us a private message on Social Media @LGUSSupport, and our team will be happy to help. We appreciate your patience. —Renzo