How to test the Thermistor of a Laser Printer/Copier Fuser Unit

What is the thermistor of the fuser unit and how to know if it's defective or not.. How to check if the thermistor of a laser printer or copier is working.
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[@taivotan2617]

Thanks

[@user-kt2hb8xr3p]

thank you teacher

[@zulehla1]

Hi, I need a thermal fuse for the Brother DCP-L2550DN printer. Can it be found somewhere? Designation of thermal fuse FR15 -196

[@viandant5]

Try aliexpress but I never hear that code

[@printyourimaginationspw8261]

Thermostat and thermistor are different?

[@viandant5]

yes

[@printyourimaginationspw8261]

@@viandant5 Sir! My Xerox wc 7535 fuser assembly shows "fuser thermostat fail" error again and again. Sometimes it works sometimes it doesn't work the whole day. My Printer experts conclude that it is a problem at the power supply end but there is hardly any voltage fluctuations in my area. What's your opinion? pl reply

[@viandant5]

@@printyourimaginationspw8261 try this ua-cam.com/video/lrGGEupG8Yg/v-deo.html