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Originally Posted by lxmuff
What are these thermo pads breaking loose? I have a problem with mine that could same problem.
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Inside the Quark, there is a thick (~1mm) thermal pad that provides heat transfer from the FETs to the case. This pad is sticky on both sides to provide consistent contact. Actually, there are two pads. One between the FETs and a small Aluminum slab, and the other between the Aluminum slab and the case. THe slab is simple a spacer.
Some people have reported that these pads, over time, come loose. I imagine constant vibrations and the intake of dust particles slowly nulls the adhesive on the pad until it simply comes loose. When this happens, there is very poor heat transfer to the case and could overheat.
Some people open up the case and use thermal epoxy instead. However, once this is done, it is not coming apart again. So, this is a
permanent solution and will void the warranty. Doing this mod makes the ESC run much cooler though.