I have noticed that after upgrading my CR10-s to Marlin 1.1.9 I cannot set my nozzle temp beyond 235C, despite having set the max temp to 250C in config.h (HEATER_0_MAXTEMP 250)
I am fairly sure I could go higher than 235C before the update. (don’t know if someone with a cr-10s on stock firmware could confirm this?)

I have also noticed that the PLA+ I am printing with seems to go down noticably better when set to a higher temp than what I had previously used for the same roll of filament before updating.
I am wondering if the printer could be reporting a higher temp than what the nozzle is actually reaching, and if that is related to whatever stopped me going up to 250C?

The display should show the temperature it is reading. When you say it cant go above 235 does the display not let you pick a higher temper or does it never heat higher than 235 even though it shows set to 250?

I have managed to resolve this now. The display would never let me select over 235C because I had set 250C as my maximum nozzle temp when setting up the config.h in the firmware. It knocks 15C off your maximum selectable temperature based on what you define as max temp in the firmware (eg set max temp as 275C, and 260C becomes your maximum selectable temerature).
I guess this make sense since if you tell the firmware that 250C is the temperature at which you wish it to cut out at, why would it then allow you to select that temperature and cause a cutout?

I don’t know if this is unique to Marlin 1.1.9, since this is the only update I have done.