Expert Thermador Range Repair
Repair for Thermador Pro Grand, Pro Harmony, and induction ranges. Star Burner ignition, ExtraLow simmer, gas valve service, and convection oven diagnostics.
Service call fee waived with completed repair
12-month warranty
Genuine OEM Thermador parts 5.0/5
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Appliances Serviced
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Satisfied Customers
A Thermador range is several appliances in one body: a Star Burner cooktop on top, a convection oven below, and on Pro Grand models a griddle, a grill, and a second oven too. They share a control panel but run on independent systems, so a fault in one rarely means a fault in the others.
Thermador’s signatures change how the repair goes. The Star Burner spreads its flame through a star-shaped port pattern, so a burner that lights unevenly is often a clogged port, not a bad igniter. ExtraLow holds a simmer by cycling the flame, so a burner that will not simmer usually needs the simmer control, again, not the igniter. Knowing the difference is what saves a wasted visit.
Gas raises the stakes, so we test spark and gas flow separately before touching a part. Dual-fuel and induction models add electric oven and cooktop electronics, and many ranges report faults through Home Connect. We read those codes as a starting point, then confirm the real cause by measurement.
Thermador Range Models We Repair
We service the full Thermador range lineup, from Pro Grand and Pro Harmony to all-gas and induction, in 30 to 60 inch widths.
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Thermador Pro Grand Range (48 and 60 inch)
Dual fuel or all-gas, with an integrated griddle or grill, a second oven, and a warming drawer. Service spans the Star Burners, the ExtraLow system, both ovens, and the added modules.
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Thermador Pro Harmony Range (30 and 36 inch)
The flush, counter-depth pro range with Star Burners and a single convection oven. Service covers burner ignition, gas valves, and oven electronics.
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Thermador Gas Range
All-gas configuration with Star Burners and a gas convection oven. Common service points are igniters, gas valve assemblies, and oven temperature sensors.
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Thermador Induction Range
Induction cooking zones with a convection oven and no gas components. Service covers induction coils, inverter boards, and touch controls, alongside the oven electronics.
Common Thermador Range Problems We Diagnose and Fix
Most Thermador range calls come down to a burner, the simmer system, the oven, or a Pro Grand module. Here is what each symptom usually points to.
Star Burner Not Igniting or Clicking
Thermador's Star Burner uses a star-shaped port pattern for wider flame spread. A burner that clicks without lighting usually means a clogged port, a worn igniter, or a gas valve not opening. We test spark and gas flow separately.
ExtraLow Simmer Not Holding
ExtraLow cycles the flame on and off to hold a very low, steady heat. When it will not simmer, the cause is usually the valve or the control that manages that cycling, not the igniter. We diagnose the ExtraLow system on its own.
Range Oven Not Reaching Temperature
In the oven cavity, off temperature usually traces to a drifting sensor, a weak bake element or igniter, or a convection fan not circulating air. We compare real cavity temperature to the setting first.
Home Connect Fault or Error Code
Home Connect-enabled ranges report faults to the app and the display. The same code can have more than one cause, so we read it, then confirm the real fault by measurement before ordering a part.
Uneven or Yellow Flame Across Burners
Flames that differ burner to burner or burn yellow point to clogged Star Burner ports, an air-shutter adjustment, or a gas-pressure issue. We clean, adjust, and verify a clean blue burn.
Griddle, Grill, or Second Oven Fault (Pro Grand)
On 48- and 60-inch Pro Grand ranges, the integrated griddle, grill, and second oven each run on their own controls. A fault in one does not mean the others have failed, so we diagnose the affected module on its own.
Star Burner Not Igniting or Clicking
Thermador's Star Burner uses a star-shaped port pattern for wider flame spread. A burner that clicks without lighting usually means a clogged port, a worn igniter, or a gas valve not opening. We test spark and gas flow separately.
ExtraLow Simmer Not Holding
ExtraLow cycles the flame on and off to hold a very low, steady heat. When it will not simmer, the cause is usually the valve or the control that manages that cycling, not the igniter. We diagnose the ExtraLow system on its own.
Range Oven Not Reaching Temperature
In the oven cavity, off temperature usually traces to a drifting sensor, a weak bake element or igniter, or a convection fan not circulating air. We compare real cavity temperature to the setting first.
Home Connect Fault or Error Code
Home Connect-enabled ranges report faults to the app and the display. The same code can have more than one cause, so we read it, then confirm the real fault by measurement before ordering a part.
Uneven or Yellow Flame Across Burners
Flames that differ burner to burner or burn yellow point to clogged Star Burner ports, an air-shutter adjustment, or a gas-pressure issue. We clean, adjust, and verify a clean blue burn.
Griddle, Grill, or Second Oven Fault (Pro Grand)
On 48- and 60-inch Pro Grand ranges, the integrated griddle, grill, and second oven each run on their own controls. A fault in one does not mean the others have failed, so we diagnose the affected module on its own.
What You Get with Every Bristol Repair
Daily work with high-end brands — not occasional exposure
Accurate diagnosis before any part is ordered
Upfront pricing — you approve the quote before we begin
12-month warranty on parts, 6 months on labor
Licensed and insured in California
Service call fee waived with completed repair
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Frequently Asked Questions
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What is Thermador ExtraLow, and why won't my burner hold a simmer?
ExtraLow is Thermador's simmer system. Instead of just lowering the flame, it cycles the burner on and off to hold a very low, steady heat, low enough to melt chocolate without scorching. When a burner will not hold that low simmer, the cause is usually the valve or the control that manages the cycling, not the igniter. We diagnose the ExtraLow system on its own, so we fix the simmer control rather than replacing a burner that lights fine.
What is a Thermador Star Burner, and does it change the repair?
The Star Burner is Thermador's signature burner, shaped like a star rather than a ring so the flame spreads wider and heats cookware more evenly. For a repair, the star shape means more ports to keep clear, so a burner that lights unevenly or clicks without catching is often a clogged or misaligned port rather than a failed igniter. We clean and align the ports and test the igniter and valve before replacing parts.
Do you repair the second oven, griddle, and grill on a Pro Grand range?
Yes. Thermador Pro Grand ranges, in 48 and 60 inch widths, add an integrated griddle, grill, a second oven, and a warming drawer, and each runs on its own controls. A fault in the griddle or the second oven does not mean the main oven or burners have failed. We diagnose the affected module on its own and repair it without disturbing the rest of the range.
Do you repair Thermador gas, dual fuel, and induction ranges?
Yes. We service all three. The cooktop side differs between them. Star Burners and induction zones each need a different diagnosis, while the convection oven electronics are similar across the line. Tell us your model when you book so the right approach and any likely parts are ready before we arrive.
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