Rocket Espresso Pressure Switch 1.1 Bar – A199906971 OEM replacement pressure switch for Rocket Espresso machines. Maintains precise boiler pressure regulation at 1.1 Bar for consistent extraction and safe machine operation. Compatible Models Rocket Appartamento (April 2021 – current) Rocket Appartamento (April 2023 – current) Part Specifications Part Number: A199906971 Set Point: 1.1 Bar Connection: 1/4" BSPM Short Thread Type: Boiler Pressure Switch Brand: Rocket Espresso Frequently Asked Questions What does the pressure switch do in a Rocket Espresso machine? The pressure switch monitors boiler pressure and cuts power to the heating element once the set pressure (1.1 Bar) is reached. It cycles on and off to maintain a stable boiler pressure during use, directly affecting steam quality and shot consistency. How do I know if my Rocket Appartamento pressure switch needs replacing? Symptoms of a faulty pressure switch include the boiler overheating or not reaching temperature, the machine continuously heating without cut-off, or inconsistent steam pressure. If the thermal fuse and heating element test fine, the pressure switch is the next component to inspect. Which Rocket Appartamento models does this fit? This switch fits the Rocket Appartamento produced from April 2021 onwards, including the updated April 2023 revision. Always verify your machine's production date before ordering. Is this an OEM part? Yes. This is an OEM-specification pressure switch carrying Rocket Espresso part number A199906971, sourced directly for the Appartamento model line.