SYMPTOM

Igniters Sparking But No Flame Ignition

Appliance: Thermador Dual Fuel Range Models: PRD304GHU, PRD364GDHU, PRD366GHU, PRD486GDHU, PRD364NLHU, PRD486NLHU, PRD484NCHU, PRD305PH, PRD364JDGU, PRD366JGU, PRD486JDGU

⚠ What This Means

The igniter produces sparks (clicking), but no gas flame ignites. The most common cause is that the gas supply valve is turned off.

🔧 How to Fix

  1. Locate the manual gas shut-off valve (typically behind or near the range).
  2. Turn the gas shut-off valve to the ON (open) position.
  3. If the gas valve was already open, check for a clogged gas orifice and ensure burner caps are properly seated.
  4. If you smell gas but burners won't light, turn off all knobs, ventilate the area, and call your gas company.

🔍 Possible Causes & Solutions

Possible CauseHow to Fix
Gas supply valve is in the OFF positionRestore gas supply to the unit by opening the manual shut-off valve.
Burner caps not properly seatedRemove and reseat burner caps. See burner cap placement guide.
Burner ports cloggedClean burner ports with a wire, needle, or straightened paper clip.
Fuse blown or circuit breaker trippedCheck and reset the circuit breaker or replace the fuse.

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❓ Frequently Asked Questions

My Thermador burners click but won't light — what's wrong?

The most likely cause is that the gas supply valve is shut off. Locate the manual shut-off valve near the range and open it. Also check that burner caps are properly seated.