@Liamjo the older flat style Sky hubs get quite warm normally so unless they are so hot you cannot leave your hand on them there is not likely to be a fault. Otherwise make sure the hub is not got other things on it and is not on a surface that stops it cooling if it is still worrying you give Sky a call,
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
