Emerson controls, valves and sensing technologies help HVAC and refrigeration systems communicate accurately and respond when conditions change. Keep those systems dialed in with real OEM Emerson parts from Parts Town. Our extensive inventory of genuine OEM Emerson replacement parts supports proper control, fit and performance across commercial HVAC, refrigeration and building management applications. Whether you're replacing a thermostat, relay, sensor, expansion valve or control module, Parts Town has the Emerson parts technicians rely on.