B250 toner hardening/caking on hot roller?

[Chip Resets SA]

B250 toner hardening/caking on hot roller? Any ideas to cause?

[Hansoon]

B&W or color machine? Aftermarket or OEM toner? OEM or aftermarket UFR? Just to start a few questions with.....................

Hans

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[EarthKmTech]

I've never had genuine toner fuse to the heat roller in the fusing unit on the B250.

thermistor scores in the roller is another story - that's all too common.