The HS tubs do not show actual temp, they just show set temp. I can't remember, within how many degress my ready light comes on... it is within a couple. I'm pretty sure the SET stays on all the time. I can't remember for sure and I don't stare at the control panel, lol.
I'd try to be patient and give it a little more time to heat up. Are you lifting the cover up frequently and checking the temp? This will make a huge difference slowing down the heat time. I know my Envoy takes a bit longer to heat than most of the tubs on this board, but I love my tub and wouldn't trade it.