Load Overcurrent Can Burn a Module Without a Board-Level Breakdown

What the evidence preview establishes

Excessive current draw overheated the solenoid windings. Wire insulation burned away, potting decomposed, and copper surfaces approached melting temperature. The damage did not originate from circuit-board insulation breakdown.

Why this case matters

Do not assign all module burning to the board. Locate the thermal center, distinguish load heating from dielectric breakdown, and correlate coil current, duty cycle, resistance, protection, and heat rejection before changing board insulation.