Star Burner clicks but will not light
Usually a wet or fouled igniter, a misaligned cap, or a worn spark electrode/module. Clean and reseat the cap; persistent clicking means the ignition parts need service.
Troubleshooting
Thermador Troubleshooting Guide
Diagnose common Thermador problems: Star Burner won't light, induction zone faults, oven temperature drift and dishwasher draining. Owner-safe checks plus when to call a pro.
Thermador pioneered the professional home range and the Star Burner, and its lineup now spans gas and induction cooking, built-in Freedom refrigeration, and dishwashers. Because the brand covers so many technologies, accurate troubleshooting starts with knowing which system you are dealing with. This guide explains the symptoms we see most often on Thermador appliances, their likely causes, and the safe checks you can perform before calling for service.
We are an independent repair company that has specialized in Thermador and other high-end appliances since 2005, serving the San Francisco Bay Area from Los Gatos. We aim to give you a genuinely helpful, technically correct picture. Owner-safe checks are spelled out clearly, while anything involving gas, refrigerant, the sealed system, or internal electronics is flagged as work for a qualified technician.
Start here: owner-safe checks
Confirm the obvious first. For gas cooking, make sure the supply valve is open; for induction and electric units, check that the dedicated breaker is on. Many display faults clear with a simple power cycle: turn off the breaker for about a minute and restore it. For refrigeration, verify the temperature setting, the door seals, and that the condenser coil area is clean, since restricted airflow is a common and avoidable cause of warm running.
On gas cooktops, let the surface cool and confirm the Star Burner caps are clean, dry, and seated correctly; debris or moisture in the igniter area is a frequent cause of repeated clicking. On dishwashers, check that the filter and drain area are clear of debris. These steps are safe. Adjusting gas pressure, opening the sealed refrigeration system, or accessing internal wiring and boards is not, and should be left to a technician.
Star Burner and induction cooktop problems
A Star Burner that clicks but will not ignite is usually caused by a wet or fouled igniter, a misaligned burner cap, or a worn spark electrode or module. Clean and reseat the cap first; if it still will not light, the ignition components need testing. A weak or yellow flame points to a clogged orifice or a gas-pressure issue that requires a technician.
Thermador induction cooktops can stop heating a zone for several reasons. First rule out the simple ones: induction requires magnetic, induction-compatible cookware, and the cooktop needs unobstructed ventilation to cool itself. If compatible cookware and clear airflow do not resolve it, and especially if a fault code appears, the cause is often a coil, sensor, or power board, which calls for diagnosis. Note the exact code and affected zone before service.
Oven and Freedom refrigeration issues
If a Thermador oven runs hot or cold or will not reach temperature, the common causes are a failed heating element, a weak igniter on gas ovens, a drifting sensor, or a convection fan fault causing uneven results. Confirm with a separate oven thermometer on the center rack so you can describe the behavior accurately before service.
Freedom column and French-door refrigerators depend on evaporator and condenser fans, sensors, and control boards to hold precise temperatures. If a column is running warm, first confirm the doors seal, the unit is not overloaded blocking vents, and the coils are clean. Beyond those owner checks, warm running often traces to a fan, sensor, or control fault. Any compressor or sealed-system repair, including refrigerant work, must be done by a qualified, EPA-certified technician.
Dishwasher faults and when to call a pro
A Thermador dishwasher that will not drain often has a clogged filter, drain hose, or air gap, and clearing accessible debris is owner-safe and frequently effective. Poor drying can relate to rinse-aid levels or the crystal-dry and heat systems; if cleaning and rinse aid do not help, the drying or control components may need service. Call a qualified technician for gas-pressure adjustment, refrigerant or sealed-system work, induction power-board faults, control-board issues, or any live-electrical repair. When a fault persists after the owner-safe checks above, an accurate diagnosis is the fastest path back to full performance. Reach our team at (650) 668-1554.
Common Thermador symptoms
Symptoms & likely causes
Induction zone not heating
Often non-magnetic cookware or blocked ventilation, but a fault code points to a coil, sensor, or power board. Try induction-rated cookware and clear airflow first.
Oven temperature drift
Commonly a failed element, weak gas igniter, drifting sensor, or convection fault. Verify with a separate thermometer before scheduling service.
Freedom column running warm
Check door seals, vent blockage, and coil cleanliness first. Beyond that it is often an evaporator or condenser fan, sensor, or control-board fault.
Dishwasher not draining
Frequently a clogged filter, drain hose, or air gap. Clear accessible debris; if it persists the drain pump or control may need service.
Dishes not drying
Often low rinse aid or a crystal-dry/heat-system issue. Top up rinse aid first; ongoing poor drying points to the drying or control components.
Display fault or unresponsive control
Often a transient glitch cleared by a power cycle at the breaker. If it returns it points to a sensor, relay, or control board needing diagnosis.
FAQ
Thermador troubleshooting FAQ
Why won't my Thermador induction cooktop heat the pan?
Induction only works with magnetic, induction-compatible cookware, so test with a different pan first and ensure the ventilation underneath is clear. If compatible cookware still will not heat or a fault code appears, the coil, sensor, or power board for that zone likely needs diagnosis.
My Star Burner keeps clicking. What should I do?
Let the cooktop cool, then clean and dry the burner cap and igniter area and reseat the cap squarely. Moisture or food debris is the most common cause. If the clicking continues, the spark electrode or igniter module likely needs service.
My Thermador dishwasher will not drain. Can I fix it?
You can safely check and clear the filter, the drain hose, and the air gap of debris, which resolves many drain issues. If it still will not drain after that, the drain pump or control may be at fault and should be diagnosed by a technician.
Is the warm Freedom refrigerator something I can fix myself?
Start with owner-safe checks: confirm the doors seal, vents are not blocked by food, and the coils are clean. If it still runs warm the cause is usually a fan, sensor, or control fault, and any sealed-system or refrigerant work must be left to a qualified technician.
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