Have you checked your thermistor or solid state relay in breaker panel under MIM compressor gauge?

XEROXPWS: The copies are fused, but if you rub them (hard) with your thumb the toner will wipe off. At the present time the copies are acceptable to the customer but I know the system is not right.  Xerox toner and developer are used. Contact arc is where it should be, however the temperature is at 375 degrees F. and I Can't crank it up any higher. Replaced the thermistor 130E7810, heat roller seems to be OK, Heat rod appears to be glowing properly when the machine is running. It's calling for steam, and the quartz heater rod comes on when the temperature cools down due to the paper feeding through the fuser area.  What is a ssr and a ufr? Got a part number? 

Replacing the fuser roll can help even if pressures are right. Age and duty cycle can affect the rubber. Also what kind of paper are they using. Paper stock can affect fusing too.

Overtoned ?

or possibly thermistor.
Each thermistor acts different than the previous one.
there are also multiple NVM locations for different temp levels.
check the NVM locations to see that one isn't out of whack

also, if it's a HI-C roll, make sure you have the correct thermistor

hope that helps

Hi NYCTech,
I took a call on a Doc135 yesterday with good fusing on 20# and unfused prints on cover stock. The new thermistor was bad. Brand new part.........I hate that!!

I've had an old fuser lamp with hot spots do this.you can't tell by seeing it glow in the system (way too bright) . the lamp isn't putting out proper wattage or there is a hot spot near the thermistor