Review on 🔥 Zerostart 3400063 Engine Oil and Fluid Heater - 3.5" x 4.5", 120V, 250W - Silicone Pad Heater for Transmission, Reservoir, and Hydraulic Fluid by Andrew Gomez

Used less than a year, mounted on the bottom of the oil pan. The bezel has been correctly set to the ground metal and the edges sealed with safe RTV Temp sealant. I walked to my truck one morning and smelled of smoke/burning. Ambient temperature was -25°F (Fairbanks, Alaska). The truck was connected to the network via a timer for the night, which turned on and off alternately. After removing this pad, I was able to puncture it with my finger. I would suggest buying a more reputable brand which I have since replaced these with.