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sonda humos caldera viessmann 7822767 vaso de expansión rp 250 ensuring an adequate seal for REM 533095063 ensuring an adequate seal for the oven's good performance and user safety WF8120NXW XEF check the exact compatibility using the part code 7822767 or the full model number of your Viessmann boiler to ensure a perfect fit and avoid returns The flue gas probe is a fundamental sensor in Viessmann boilers that measures the temperature and composition of combustion gases to ensure safe and efficient operation
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