{"product_id":"gaggia-classic-pro-coffee-temperature-switch","title":"Gaggia Classic Pro Boiler Thermostat 107°C – M4, 421940202911","description":"\u003cp\u003eGaggia 107°C boiler water temperature thermostat, part number 421940202911, with M4 mounting. This coffee temperature switch is listed for selected Gaggia Classic and Classic Pro machines, plus Carrera and Evolution models. Verify the original part and your machine version before ordering.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePart number: 421940202911\u003c\/li\u003e\n\u003cli\u003eComponent: boiler water \/ coffee temperature thermostat\u003c\/li\u003e\n\u003cli\u003eTemperature rating: 107°C\u003c\/li\u003e\n\u003cli\u003eMounting: M4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eListed compatibility\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eGaggia Classic \/ Classic Pro, subject to version verification\u003c\/li\u003e\n\u003cli\u003eGaggia Classic 2019\u003c\/li\u003e\n\u003cli\u003eGaggia RI9380 and SIN035R references\u003c\/li\u003e\n\u003cli\u003eGaggia Carrera and Evolution\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCompare the original thermostat's part number, temperature rating, mounting and terminals with your machine's parts diagram. Compatibility is not confirmed for every Classic production version.\u003c\/p\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eWhat does this thermostat control?\u003c\/h3\u003e\u003cp\u003eThis is the 107°C coffee temperature thermostat used for boiler water temperature control on the listed Gaggia machines. It is not listed here as a steam thermostat or a high-limit safety thermostat.\u003c\/p\u003e\u003ch3\u003eWhat is the replacement part number?\u003c\/h3\u003e\u003cp\u003eThe listed part number is 421940202911. Match this reference and the 107°C rating against your original component before purchasing.\u003c\/p\u003e\u003ch3\u003eDoes it fit every Gaggia Classic Pro?\u003c\/h3\u003e\u003cp\u003eFitment depends on the machine version. Check your model reference and parts diagram, including the listed Classic 2019, RI9380 and SIN035R references, rather than relying on the Classic Pro name alone.\u003c\/p\u003e\u003ch3\u003eWill it fix a machine that is not heating?\u003c\/h3\u003e\u003cp\u003eA heating fault can have several causes. A qualified technician should test the thermostat, heating element, wiring and safety components before deciding which part needs replacement.\u003c\/p\u003e\u003ch3\u003eWhat should I know about installation?\u003c\/h3\u003e\u003cp\u003eHave a qualified technician install the thermostat. Disconnect power and allow the machine to cool before servicing. Do not overtighten the M4 mounting when fitting it into the boiler, as the thermostat can shear off. Never bypass temperature controls or safety devices.\u003c\/p\u003e\u003cp\u003eNeed help choosing the correct part? Contact Bear Coffee Machine with your machine model and clear photos of the original thermostat and its markings.\u003c\/p\u003e","brand":"Gaggia","offers":[{"title":"Default Title","offer_id":47102345248964,"sku":null,"price":28.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0682\/6632\/8260\/files\/2026-10-24090839_64c9dfde-a5da-46d2-ac8e-121179e87fb8.jpg?v=1792793455","url":"https:\/\/bearcoffeemachine.com.au\/products\/gaggia-classic-pro-coffee-temperature-switch","provider":"Bear Coffee Machine ","version":"1.0","type":"link"}