You can relax the Thermal Protection in configuration_adv.h. You can double the time values and make the temperature shift numbers half as big. For example, if it expects to be able to shift the temperature 4 degrees in 20 seconds... Change it to 2 degrees in 40 seconds.
If you are not using a Z-Probe... You can just dial in your Z_MAX_POS number to be correct. Rebuild the firmware... Upload it... And do a M502 followed by a M500.
If you are not using a Z-Probe... You can just dial in your Z_MAX_POS number to be correct. Rebuild the firmware... Upload it... And do a M502 followed by a M500.