{"product_id":"vibiemme-domobar-lollo-boiler-pressure-switch-regulator","title":"Vibiemme Domobar \u0026 Lollo Boiler Pressure Switch Regulator – Replacement Part","description":"\u003ch2\u003eVibiemme Domobar \u0026amp; Lollo Boiler Pressure Switch Regulator\u003c\/h2\u003e\n\u003cp\u003eOEM-specification replacement boiler pressure switch regulator for Vibiemme (VBM) Domobar and Lollo espresso machines. The pressure switch controls boiler temperature by switching the heating element on and off at the set pressure point. When it fails, the boiler can overheat, causing steam pressure to exceed safe operating limits and triggering the safety valve.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Models\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibiemme (VBM)\u003c\/td\u003e\n\u003ctd\u003eDomobar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVibiemme (VBM)\u003c\/td\u003e\n\u003ctd\u003eLollo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePart Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Vibiemme (VBM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e Domobar, Lollo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Boiler pressure switch regulator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTools required:\u003c\/strong\u003e 17mm or 19mm spanner, flat-head screwdriver\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eVBM Domobar Overheating or Safety Valve Blowing? A Short Maintenance Guide\u003c\/h2\u003e\n\n\u003cp\u003eIf your Vibiemme Domobar or Lollo is building excessive steam pressure — especially if steam is escaping from the safety valve — the boiler pressure switch is almost certainly the cause. Here’s how to understand the fault and replace the switch safely.\u003c\/p\u003e\n\n\u003ch3\u003eHow the Pressure Switch Works\u003c\/h3\u003e\n\u003cp\u003eThe boiler pressure switch monitors steam pressure inside the boiler. When pressure reaches the upper set point (typically around 1.2–1.3 bar on the Domobar), the switch opens and cuts power to the heating element. As the boiler cools and pressure drops to the lower set point, the switch closes and the element heats again. This cycle maintains a stable boiler temperature. When the switch fails — usually sticking in the closed position — the element runs continuously, boiler pressure climbs above 1.5 bar, and the safety valve lifts to prevent damage.\u003c\/p\u003e\n\n\u003ch3\u003eSigns the Pressure Switch Has Failed\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteam pressure exceeding 1.5 bar\u003c\/strong\u003e — the boiler pressure gauge climbs higher than normal operating range and does not stabilise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety valve discharging steam\u003c\/strong\u003e — steam or water venting from the safety valve on the boiler is a clear sign pressure is beyond the safe limit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine constantly overheating\u003c\/strong\u003e — the machine feels excessively hot, steam wand pressure is unusually strong, or the machine takes much longer than normal to cool down between uses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo steam pressure building\u003c\/strong\u003e — a pressure switch stuck in the open position will prevent the element from heating at all, resulting in no steam.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Replace the Pressure Switch\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch off the machine\u003c\/strong\u003e and isolate from mains power. Allow it to cool completely and depressurise fully before opening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotograph the existing wiring\u003c\/strong\u003e before disconnecting anything — this ensures correct reconnection of the switch terminals.\u003c\/li\u003e\n\u003cli\u003eUse a \u003cstrong\u003e17mm or 19mm spanner\u003c\/strong\u003e to unscrew the old pressure switch from the boiler fitting. Support the boiler fitting with a second spanner if needed to avoid stressing the boiler.\u003c\/li\u003e\n\u003cli\u003eApply PTFE tape to the thread of the new switch if required and screw it into the boiler fitting.\u003c\/li\u003e\n\u003cli\u003eReconnect the wiring terminals using your photograph as a reference.\u003c\/li\u003e\n\u003cli\u003eRestore power, heat the machine, and verify that boiler pressure stabilises within the normal operating range before returning to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eCan I adjust the pressure switch instead of replacing it?\u003c\/h3\u003e\n\u003cp\u003eSome pressure switches have an adjustment screw that allows the set point to be raised or lowered. However, if the switch has failed internally and is no longer cycling correctly, adjustment will not restore reliable function. Replacement is the only permanent fix for a failed switch.\u003c\/p\u003e\n\n\u003ch3\u003eWill this pressure switch fit other VBM models?\u003c\/h3\u003e\n\u003cp\u003eThis switch is confirmed for the Vibiemme Domobar and Lollo. Other VBM models may use different pressure switches. Contact Bear Coffee Machine to confirm compatibility before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eDo you ship Australia-wide?\u003c\/h3\u003e\n\u003cp\u003eYes. Bear Coffee Machine ships to all Australian states and territories with fast dispatch.\u003c\/p\u003e","brand":"Bear Coffee Machine","offers":[{"title":"Default Title","offer_id":46701447086276,"sku":null,"price":180.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0682\/6632\/8260\/files\/pressureswitch_7f46b42f-2529-4c1d-be1c-4b4f72595195.jpg?v=1789470776","url":"https:\/\/bearcoffeemachine.com.au\/products\/vibiemme-domobar-lollo-boiler-pressure-switch-regulator","provider":"Bear Coffee Machine ","version":"1.0","type":"link"}