ROCKET ESPRESSO APPARTAMENTO General Troubleshooting

Ma-Ter XP110 Pressurestat

The pressurestat is the primary mechanical switch that regulates boiler pressure. Over time, the internal diaphragm can scale over or the microswitch contacts can weld shut or fail open, preventing the heating circuit from cycling and causing the pressure gauge to remain at a fixed, incorrect reading or zero.

SKU: A19000443

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Giemme Control Box (Power Board)

A documented issue in earlier Appartamento models involves the relay on the Giemme control board failing under the high amperage load of the heating element. When the relay fails, the board cannot send power to the boiler, resulting in a machine that never builds pressure, leaving the gauge stuck at the atmospheric zero mark.

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Rocket Boiler Pressure Gauge

If the machine is successfully producing steam and hot water but the needle remains stationary, the internal Bourdon tube or the 1/8-inch capillary feed line is likely obstructed by mineral deposits. The gauge itself is a sealed mechanical unit; if the internal spring mechanism loses calibration or becomes physically jammed by debris, the entire unit requires replacement.

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