Sous Vide won't heat?

So I’m on my second Sous Vide precision cooker (the first one decided to beep incessantly above 135F and refused to heat past that) and all was going well the first two times I used it, but I go to use it today and maybe the heating element is broken? I’m not entirely sure what is happening because it seems happy to circulate the water and the top of the Sous Vide machine itself gets very hot, but the water just will not raise in temp. I left it for 6+ hours and unplugged and replugged it several times and it just wasn’t interested any working. Any troubleshooting solutions you guys can help me with? 

I would recommend a call to Customer Service. They are very responsive.