Thermador Range Oven Won't Bake, Broil Works: Bake Igniter Replaced in Belmont
A Thermador PRG366GH in Belmont would broil but not bake. The bottom bake igniter had failed, so I replaced it with an OEM Thermador igniter.
Repair at a glance
| City | Belmont, CA |
|---|---|
| Appliance | Gas range oven |
| Category | High-End Brands |
| Brand & model | Thermador PRG366GH/16 36-inch pro-style gas range |
| Repair date | |
| Customer complaint | The stovetop and the broil function were both working fine, but the oven bake function was not working. It seemed the oven lighter had an issue. |
| Diagnosis | The bake igniter was not working and needed to be replaced. |
| Repair cost | $497 (parts and labor) |
| Warranty | 6 months on parts and labor |
| Outcome | Repaired |
What I found
The cooktop burners lit normally and the broiler worked, so gas was reaching the range. Only the bake side of the oven stayed cold.
With the oven floor and burner cover removed, I checked the bake igniter next to the burner tube. It was not working, and on a gas oven the valve will not open for the burner until the igniter heats up, so no gas reached the bake burner.
How I replaced the igniter
The customer chose the OEM igniter over a cheaper aftermarket one. I unbolted the old igniter from the burner bracket, disconnected its wires and mounted the new one in the same position, keeping the glowing element close to the burner ports.
After reassembling the oven floor, I ran the bake cycle and watched the igniter glow and the burner light.
Result
The oven bakes again with the new igniter. The total was $497 with a 6-month warranty on parts and labor.
Part replaced: OEM Thermador bake igniter.
Photos from this repair
The Thermador range before the repair. 
The oven floor removed for access. 
The bake burner area inside the oven. 
The bake burner tube and igniter. 
The old igniter on the burner. 
The old igniter and the OEM replacement. 
Comparing the igniters before installation. 
The new igniter installed at the burner.
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