Hi and welcome to Just answer.
Initially, try to descale your machine. Sometimes the limescale build up on your machine is affecting the temperature. Note: Please follow the instruction given on your user manual on how to descale and use the Saeco recommended descaling solution.
If still persist after descaling, you have problem o heating element/boiler that need to check/replace by the professional. In this case there is no DIY (do it yourself) fix and you need to send your machine to the nearest Saeco repair center or trusted local coffee machine repair shop.
Hope this information will be helpful.
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