Bed temperature when printing from sdcard

I have a Prusa i3 printer with LCD and SD Card.

When I put a gcode file on the SD card, it complains when the bed temperature is set above 75°C and refuses to print. When I use the LCD controls to manually set the bed temperature, the same limit applies.

However, when I use the "heat to presets" function, the bed will happely go to 90°C as this is in the preset. Also, printing through RepetierHost also allows the higher temperatures.

Any idea on how I can get the printer to accept the higher temps when using the SD Card?

Or am I just using to high temperatures? Most temperature I find out there are somewhere between 80 and 110 depending on the material, so 75 looks low.

This one looks like maxtemp protection set in marlin, if possible, try asking a preconfigured firmware from your supplier especially its config.h, then check the maxtemp value

If it does set at 75, change that to 120 and reupload the firmware