I guess it would be determined by what it is set at. The boiling point for Canola oil is 225*f.
I would think that the setting would be higher than that so I don't think it would be a problem.
Its a 20 minute timer if its like the one i had the easiest thing to do is drill a hole in the center of the knob, then put a zip tie through the hole and wrap it around the box after turning it to its max setting.
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