Upon arrival investigated heat strip contactor, pulling in and out, was losing 24V call at contactor, low voltage in unit, discovered a rats nest as culprit, re-wired, stripped back low voltage wires to ensure all contacts were making proper connections. Was not able to replicate issue afterwards. Belt on unit is extremely worn and tattered, need to replace to prevent any airflow issues, will need a A47. Heat strip sequencer in arching, would strongly recommend replacing heat strip to prevent from burning up.