The magnetic contactor has 4 wires on it. The top 2 wires burnt off and started a mini fire in the system. Burnt the contactor, circuit board, and burnt/melted the TXV sensing bulb tubing. What would cause these wires to burn like this? I am giving the customer a quote on a repair, but its almost not worth repairing after all the money will be spent fixing this unit.
Any idea's why this may happen?