Good friend servimat. I did the maaneobra you told me and effectively warmed up. But I have not found any loss. The thermos is new. So rule out the possibility of tartar. And at the moment I am walking perfectly, the only thing I did is to leave sir water from the water outlet that stops or is a purge. And you wanted that to have been the somucion the truth I don't know, it's the only weirdest thing I did. However I leave a cordial greeting and very grateful for your prompt response and the desire to help. God bless you and I thank you very much for the advice. I will continue to control I hope I have no surprises. Salt