Helix 2 is getting very hot even if nobody is using internet. My UPS uptime is reduced a lot.

Helix 2 (Model:TG4482A rev 10) is getting very hot even if nobody is using internet in my house (tested bridge mode and no bridge mode). I compare with bell Hub 2000 and Helix 2 is ten times hotter! Also when connecting Helix 2 to my UPS the uptime is going down a lot. Looks like Helix 2 has a bad hardware design and is heating and consuming a lot for just a simple modem/router.