SYMPTOM

Electrical Failure: Gas Dissipation Warning (Wait 5 Minutes)

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

⚠ What This Means

If a gas control knob is turned ON when there is no electrical power to operate the electronic igniters, unburned gas may accumulate. The manual warns: Turn OFF the gas control knob and wait 5 minutes for the gas to dissipate before lighting the STAR burner manually. Ignoring this could cause a gas flash or minor explosion.

🔧 How to Fix

  1. Immediately turn the gas control knob to OFF.
  2. Wait 5 minutes for any accumulated gas to dissipate.
  3. Ensure the area is well-ventilated (open windows, turn on range hood if it has battery backup).
  4. After 5 minutes, carefully hold a lighted match to the burner ports and turn the knob to HI.
  5. Do NOT attempt to light XLO burners manually — they cannot be lit without electrical power.

🔍 Possible Causes & Solutions

Possible CauseHow to Fix
Knob turned ON without power to ignitersGas flowed but did not ignite. Turn knob OFF and wait 5 minutes before manual lighting.

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❓ Frequently Asked Questions

What happens if I turn on a Thermador burner without electricity?

Gas flows but the electronic igniter cannot spark. Turn the knob OFF immediately and wait 5 minutes for gas to dissipate before lighting manually with a match.