The Sensor That Turns the Hood On by Itself
| What it is | The sensor reading the air through the canopy, which raises blower speed without being asked. |
|---|---|
| Where it sits | In the canopy where the rising air passes it |
| How it fails | Blower comes on by itself, or will not drop back to off |
| Checked with | Watched against cooktop heat, then read at the board terminals |
| Price | Quoted after the $89 visit |
A sensor, not a fault
The call generally opens with the hood being described as possessed. It comes on mid-cook, at a speed nobody chose, then stays there. On a hood carrying this sensor, that is the design doing its work: something under the canopy grew hotter than the hood wants to live with, so the blower was raised. A pan forgotten over a burner at full heat will produce it reliably.
When it is doing its job
Two things separate a feature from a fault. Timing, first — a hood stepping up while there is genuine heat below it, and settling once the cooking is over, is behaving correctly. Then repeatability: the same conditions should bring the same response. A hood raising itself over a cold cooktop, or one that never comes back down long after the kitchen cooled, has lost the thread.
When it has stopped letting go
The second pattern is what we are called out for. The sensor, its wiring and the board input receiving it are read together, because a sensor stuck at one value and a board no longer listening produce the same evening for you. No temperature figures are quoted at you here: what gets compared is the sensor’s reading against the heat genuinely present, at the hood, with the cooktop worked up to it.
What putting it right costs
This one has no published band. Wolf Repair Los Angeles puts a figure on it after the diagnosis, as one number covering the part and the labour, and nothing is ordered until you have agreed it — (310) 626-4008.
A flat $89 buys the call-out and a full diagnosis, and that $89 is deducted from the repair once you have approved it.
Follow-ups
Can the automatic speed change be turned off?
Not as a preference on a hood that has it — the response is a protection rather than a setting. What can be reduced is the heat reaching it: a pan left over an empty burner, or a griddle worked hard with the hood on its lowest setting, gives the sensor every reason to take over.
The hood keeps running long after cooking. Is that dangerous?
It is not dangerous, though it is worth attention, because a blower that will not return to off is either still being told to run or is no longer being told to stop. Wolf Repair Los Angeles reads the sensor and the board input it reports to on one visit — (310) 626-4008.