SYMPTOM

Burner Cap Misalignment (Flames Too High, Shooting Out, Gas Odor)

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

⚠ What This Means

Improperly placed burner caps cause a range of hazardous symptoms: flames too high, flames shooting out of burners, burners not igniting, uneven flame pattern, or gas odor. The STAR burner caps must be precisely seated on their bases for safe operation.

🔧 How to Fix

  1. Turn all burner knobs to OFF and allow burners to cool completely.
  2. Lift each burner cap off its base.
  3. Inspect caps and bases for food debris, grease, or damage. Clean if necessary.
  4. Place each cap squarely on its base — it should rest flat with no gap, and completely cover the star-shaped base when viewed from above.
  5. Gently try to move each cap side-to-side to verify it does not rock or wobble.
  6. Turn each burner on to verify proper flame: should be blue, stable, burning completely around the cap, with no gaps.

🔍 Possible Causes & Solutions

Possible CauseHow to Fix
Burner flames are too highBurner cap not seated flat. Reseat the cap.
Flames shoot out of burnersBurner cap tilted or not covering the base. Reseat properly.
Burners do not igniteCap may be blocking the igniter. Ensure cap is centered on base.
Burner flames light unevenlyCap is off-center. Reseat so it covers the star shape completely.
Burner emits gas odorGas is escaping because the cap is not seated. Reseat immediately and verify flame.

🛒 Replacement Parts for This Fix

STAR Burner Cap Varies by burner size
RepairClinic Amazon
STAR Burner Base Varies by burner size
RepairClinic Amazon

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❓ Frequently Asked Questions

How do I know if my Thermador burner cap is installed correctly?

A properly seated cap rests flat on the base, does not rock or wobble, and completely covers the star shape of the base when viewed from above. There should be no visible gap between cap and base.

Can a misaligned burner cap be dangerous?

Yes. An improperly placed cap can cause flames to shoot out, produce gas odor, or create dangerously high flames. Always ensure caps are properly seated before use.