Power limits based on processor throttling

A method comprising, at a device that includes a scan engine, a print engine, and an ambient temperature sensor:

• determining a current ambient temperature using the ambient temperature sensor;
• determining when the scan engine begins to scan;
• controlling a fuser of the print engine to begin heating to a fusing temperature at a start time, set relative to an scan end time of the scan engine, and determined from:
• a curve, associated with the current ambient temperature, that relates a time period for the fuser to heat to the fusing temperature, to a factor associated with cooling of the fuser;
• and a current factor associated with cooling of the fuser.

A non-transitory computer-readable medium comprising instructions that, when executed by a processor of a device that includes a scan engine, a print engine, and an ambient temperature sensor, causes the processor to:

• determine a current ambient temperature using the ambient temperature sensor;
• determine when the scan engine begins to scan to generate a print job;
• determine a current factor associated with cooling of a fuser of the print engine;
• control the fuser to heat to a fusing temperature, to print the print job from the scan engine;
• determine a time difference between a scan end time that the scan engine stops scanning and a fuser heating end time at which the fuser reaches the fusing temperature;
• and
• store, in a memory, the current ambient temperature in association with indications of the time difference and the current factor, the indications to adjust a start time for heating the fuser for a later print job at the current ambient temperature.