a method for mold heater startup and sequencing detects the heater zones associated with greater mass and allows them to heat up before zones of lesser mass , thereby reducing wear of the associated mechanical components and minimizing degradation of plastic material . the zones of smaller mass are kept at minimal temperatures until the zones with greater mass reach a set point . the system is capable of detecting multiple levels of thermal load and provides appropriate sequential startup of the identified thermal loads . the operator may also manually program the system to override certain automated sequences in order to ensure an optimal startup sequence . the sequencing of power application to large heaters also minimizes the peak current draw of the system .