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After about eight years and a similar failure last year, this came as no surprise: It’s a W5W “parking light” in the same fixture as the melty halogen high-beam bulbs (used as daytime running lights at half power), so it gets toasted on those occasions when we drive somewhere. The adhesive holding the LED strip…
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The thermal resistance from aluminum-to-thermistor seems to be no big deal
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Of course, that doesn’t work worth beans when the file name has several periods scattered through it.
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The Peltier module can’t quite reach 0 °C with a 14 °C ambient
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The P control may not have enough moxie to reach the deadband and the I control seems overenthusiastic.
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Then the total circuit resistance is nearly 4 Ω… which is obviously not the case
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I cleaned out a bunch of fuzz and a spider husk while the hood was up…
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Perhaps you should read the manual before being backed over?
The Smell of Molten Projects in the Morning 