Jenn-Air JGS1450DS Slide-In Gas Range MECH-09 Error Fix: Control Knob Cracked or Broken

Error code MECH-09 on the Jenn-Air JGS1450DS Slide-In Gas Range means: Control Knob Cracked or Broken. A cooktop or oven control knob has cracked, broken, or the D-shaft engagement has worn out causing the knob to spin freely without controlling the gas valve — replace the knob with the correct OEM Jenn-Air replacement; aftermarket knobs may not fit the valve stem properly, which is a safety hazard on gas appliances; on Jenn-Air Pro-Style ranges, the heavy metal knobs are expensive but critical for safe gas valve operation; do not operate a gas burner with a loose or slipping knob

The most successful fix is "Replace Control Valve Stem and Knob Assembly" (medium difficulty, ~60 minutes). Estimated DIY cost: $40-$60. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Control Valve Stem and Knob Assembly") is rated medium difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver, T20 Torx screwdriver, Needle-nose pliers.

DIY cost: $40-$60. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

The Jenn-Air JGS1450DS Slide-In Gas Range has 8 other known error codes, including: F0 (Function Key Stuck), F1 (Defective Touch Pad or ERC), F2 (Oven Over-Temperature), F3 (Oven Temperature Sensor Open or Shorted), F4 (Oven Temperature Sensor Open Circuit), and 3 more.

Error code MECH-09 also appears on 7 other Jenn-Air models: JB36NXFXLE 36 in Built-In French Door Refrigerator with Preserva Food Care, JFFCC72EFS French Door 22.1 cu ft French Door Refrigerator with Turbo Cool and LED Lighting, JGRP536HL 36 in Pro-Style Gas Range with 5.8 cu ft Convection Oven, JGS1450FS Gas Range 30 in 5.0 cu ft 18,000 BTU Gas Range with Even-Heat True Convection, JJW2830IM Wall Oven 30 in 4.1 cu ft Single Wall Oven with True Convection and Self-Clean, JMW2430IM 30 in Combination Microwave Wall Oven with True Convection, and 1 more. The fix may vary by model, so check each model's specific page for tailored repair steps.