Joe A Longwood , FL December 13, 2016 Appliance: General Electric Gas Range ZDP36N4DH1SS Ge Range Zdp36n4dh1ss: Low flame on 2 burners. How to replace Simmer Valve. CHANGED 1 OROFICE AND CLEANED 1 2 SERVICE COMPANIES COULD NOT DIAGNOSE OR FIX IT! Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes