I fix laminators for a living the nice tech folks at banner will be glad to help you 800 572 2144
You thermostat s going bad it has the knob on the end. Do note which way to turn to increase temperature:) Most laminators are backwards from your typical home thermostat, this cause wierd issues, people thinking they are turning temp up when really they are setting it cooler:( If you remove the knob in the middle of the shaft theres a small hole with a screw in the bottom, it calibrates the thermostat, turn it to increase temp. If the machines old I would replace the thermostat its easily replaceable and not expensive. If you call banner and talk to robert tell him bob from pittsburgh said hi
bob haller service and sales pittsburgh pa, March 2011