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The Goodman 10135604 Relay is a genuine OEM switching relay used in the control circuit of the ASH130241AD heat pump. Relays like this one take a low-voltage coil signal from the thermostat or control board and use it to switch a heavier load — isolating the delicate control electronics from the higher current draw of fans, valves, and auxiliary components. A chattering, stuck, or burnt relay shows up as intermittent operation, a component that won't energize, or a unit that runs only when tapped.
A cross-referenced generic relay may carry a similar contact rating but rarely matches the exact coil voltage, terminal layout, and footprint of the factory part. The genuine 10135604 drops straight onto the existing spade terminals and mounting point with the correct coil rating.
Easy. With power removed at the disconnect, photograph the wiring, pull the spade connectors one at a time, transfer them to the new relay in the same positions, and re-seat it. No refrigerant work required.