Coleman 1500 W Inverter/Charger is a portable 12‑V DC to 110‑V AC inverter designed for RV and outdoor use, featuring built‑in surge protection and a battery‑monitoring display. Common failure modes include overheating of the MOSFET bridge due to clogged ventilation or over‑load cycling, degradation of the internal capacitor bank causing voltage ripple, and failure of the input fuses or circuit breakers when shorted. First‑check steps: verify that the 12‑V supply is within spec (10–14 V) and that the output transformer windings are intact; inspect for thermal damage on the MOSFETs and capacitors, and confirm all fuses/thermal cut‑offs are functional; finally review the display error codes or LED status indicators for any fault flags.[oss-gpt-20b]