Thermador Range Hood NO-POWER Error: Total Power Failure
Thermador range hood NO-POWER error indicates total power failure. Stop using the appliance and call a Thermador-certified technician immediately for diagnosis. What Does Thermador Range Hood NO-POWER Mean? NO-POWER describes a complete loss of electrical power on a Thermador Professional or Masterpiece range hood. The hood is entirely unresponsive — no display activity, no fan […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A range hood with no power provides no ventilation. Do not cook heavily above an unvented range or cooktop while the hood is non-functional. Restore power and confirm full operation before heavy cooking sessions.
Can I reset the code?
Yes. Resetting a tripped circuit breaker restores power if a breaker trip is the cause. A blown inline fuse or failed control board cannot be reset and requires component replacement.
When to stop immediately?
Stop if you notice: Breaker trips again immediately after reset, Burning smell from the hood body or junction box area.
Symptoms You May Notice
Range hood is completely dark and unresponsive
Pressing any control panel button, fan speed, or light switch produces no response and no indication of any kind on the display or panel.
Other appliances on the same circuit have also lost power
Other devices served by the same electrical circuit as the range hood — such as under-cabinet lights or a built-in microwave above the range — have also stopped working.
Hood was working normally and then went completely dead without any warning
The range hood was in normal operation and then abruptly lost all power mid-session, with no prior warning signs such as unusual noise or performance decline.
Possible Causes
Tripped circuit breaker
The dedicated or shared circuit breaker serving the range hood has tripped, cutting power to the hood entirely.
DIY PossibleFailed inline fuse inside the hood
Some Thermador range hood models include an inline thermal fuse in the power supply circuit inside the hood body. If this fuse has blown due to a power surge or overload, the hood loses all power.
Requires ProfessionalFailed primary control board
The main control board inside the hood has failed at its power supply section, preventing any voltage from reaching the fan motor, lights, or display.
Requires ProfessionalSafe Checks You Can Do
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1
Check the circuit breaker panel
Go to the main breaker panel and look for any tripped breakers — they will be in the middle or off position rather than fully on. Reset any tripped breaker by pushing it fully off, then firmly to the on position. Return to the hood and check whether power has been restored.
If the breaker trips again immediately when reset, there is a fault in the hood or its wiring that is drawing excessive current. Do not reset more than twice — a repeatedly tripping breaker indicates a wiring or component fault that needs investigation.
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2
Verify power at the wall outlet or junction box
If the circuit breaker is not tripped but the hood has no power, verify that power is present at the supply point. Plug-in Thermador hood models can be tested by unplugging and plugging back in. Hardwired models need voltage confirmed at the junction box by a technician.
On Thermador Professional hoods that are hardwired directly into the home wiring, the junction box is typically located inside the cabinet above the hood. Only a qualified electrician or appliance technician should open a hardwired junction box.
When to Call a Professional
Contact a qualified technician if:
- Circuit breaker trips repeatedly on reset
- Inline fuse inside hood body shows open circuit on continuity test
- Voltage present at supply junction box but zero voltage at control board power terminals
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