How do you replace a thermal fuse

Question edited for a lot more clarity. Full 'make model (what is is)'
Question moved to model category.

Dryer Thermal Blower Fuse for Whirlpool GEW9868K Part

Them Parts https://themparts.com > products > dryer-thermal-blower...
This thermal blower fuse is product and spare part used in Whirlpool GEW9868K Dryer machine model; will assist you in repair, replacement and maintenance.
US$12.00

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Bunn switches if the rocker style as the looks like will have two leaves on the side of the switch that will need to be squeezed in order to get it past the square hole. These can be really tight but if your sure it's at fault then just crush it to remove the pieces. The new on should snap in if the hole was not damaged.
* Since your checking the brewer you should get the manual that may be available from Bunn.com (I haven't checked for this model but they usually post the manuals)
* This seems to be a home version of a VPR commercial brewer (but nicer). So expect the same parts for the fuse, thermal fuse, thermal disk (or thermostat).
* Note: If your not familiar with Bunn brewers then make sure you look at every piece of wire as some high limit fuses are inside plastic tubing or heater braiding.
* Thermal disks look like a metal button with a ceramic cap or button attached to it. This can be a high limit (reset-able) or a thermostat. * It may have a standard thermostat with bulb but it may be a thermsistor probe with a PC board to control the brew heat.
* Final; this is the 3d question on this particular brewer. All have similar problems with heating. It's the same with VPR's. If I set them up I know it works properly. It's when someone moves them to another office that's the problem as they dump out the water prior to the move then plug it in without refilling the tank. Thermal fuse blows. There is a link below showing how to set up this brewer.
Aloha, ukeboy57
https://www.bing.com/videos/search?q=bunn+grx-b&&view=detail&mid=E6D1ADD550DA3DA5B120E6D1ADD550DA3DA5B120&&FORM=VDRVRV

hope this is of some help
the thermal fuse is blowing because the unit is getting to hot you replacing the thermal fuse has not cured the problem, and it will blow again , the problem is the thermostat is set to high or is faulty / allowing the unit to go over temperature hence the thermal fuse blowing
its the control stat that you should be looking at. good luck

Call for service! Repairs should be performed by a qualified Bunn tech.
*** the following is for information only ***
* Thermal fuse blows due to no water in tank and/or over heating.
* Depending if the tank was empty and how hot the element got will determine what blows.
* If it was completely dry when plugged in then the element got cherry red hot and may have melted gaskets as well as all the fuses.
* Depending on the model, there may be 2 thermal fuses or even a 3d on the thermal blanket.
* If the brewer was filled but left on for a long period (weeks?) then the tank just boiled off till the fuse blew. Good chance the element is ok. But have to check to be sure.
* No model given so I'm guessing a VPR or similar pour over (BXB series) These blow out when not properly filled before powering up.
* VPR's .usually have a normal load on from the warmer blanket. The load (amps) will kick up on the initial heating of the tank (filled with water) then drop down after reaching temperature.
* There is an additional load if any warmers are turned on.
* The on/off switch on a VPR will activate the main heater element AND the brew warming plate (Blanket stays on all the time)
* Easiest way to check is amperage loads on each section. Continuity is a bit harder as it does not tell you if it's shorted (unless you know the resistance loads to begin with)
* Final: Get a qualified service tech to check just to be safe.
Aloha, ukeboy57

Could be one of several issues. MC won't hear if it has low water. Low water may be caused by scaled probe, no water supply or other flow problem. Could be that thermal fuses on element have blown and need replacing. Could be that heating element is burnt out. You will need to do some further basic diagnostics.

Don't know about a recall, but the most common cause is a bad element.

Okay, When going away most people empty the tank completely. When returning you must start it as if brand new out of the box. Follow the MFR's instructions for an initial fill and heating.
Some don't empty but just unplug just as you did. Places like Arizona with very low humidity can dry out or lower the tank water where the heating element is not in water. This element will overheat and trip out the thermal fuse.
**Another scenario is the empty unit was plugged in and heating while someone was going to get the water. Over heat then blows fuse.
** The "Vacation" switch is very visible so you probably have tried it already and you have already checked the outlet and breakers. Still looks like a thermal fuse problem.
** Switches do go bad as they are turned on and off daily. Possible yours was bad before but never noticed as it was never turned off till on vacation.
** There are other possible scenarios but all point to a thermal fuse, thermal limit, blown fuse, switch, Heater element, or cut wire (Mice). All are electrical problems and require a MFR tech. Contact your vendor or MFR for service.
*Have a safe New Year, Aloha! ukeboy57

We will be happy to replace that lid free of charge for you. Please call customer service at 800-352-2866 and we will send you one out.

This machine is still under warranty. If you will give customer service a call, we can replace it for you at not cost. The # to call is 800-352-2866.

Please contact customer service with the model and code date. If your machine is 3 years old or less, we can replace it free of charge. If the machine is over 3 years old, we can replace it at a reduced price.