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This is a microwave, so where exactly are the cabinets burning around the microwave?
OK so you have your microwave set on re-circulation where it takes the air from below the microwave (when you have the cooktop on) and shoots it back into the kitchen to try to remove the grease (and possibly smoke if you have carbon filters installed). To save your cabinets, you'd need to re-route your vent so that it vents out an external vent either behind the microwave or above it. You can change the direction of the vent fan if you uninstall the microwave and remove the outer shell. Rotate the vent fan to the direction you want it to blow out and then reinstall the outer shell. Now you'll need to install a vent through your cabinets or wall to vent outside your house, but that is the only other option if you want want to have the microwave recirculate and possibly ruin your cabinets due to being too hot.
I see you requested a phone call so I'll send you the option if you'd like to speak by phone.