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Thermal fuse repeatedly blows

I installed a new thermal fuse and it stopped working after 2 uses. when tested current does not pass through fuse any longer. I assumed part defective and replaced. The same thing happened on first dry attempt. I dont think it is the part but an unknown problem in my dryer. can you help me figure the problem out. Maybe I should replace the high heat fuse as well? the current one does have good test results for current/continuity. thank you

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The thermal fuse or high limit thermostat failure generally points to a reduction of air flow due to SOME blockage either inside the dryer or in the vent pipe leading out of the house. If you find either of these parts bad be sure to check the vents after replacing parts to ensure the same parts won't fail again.

It sounds like you have blockage in SOME area of the venting system, either interior to the dryer or in the vent pipe leading out of the house. The thermal fuse is a safety feature to warn of low air flow. Remove vent from wall and run dryer placing hand over end of hose to determine strength of flow difference after attempting to do the same thing at the exhaust outside the house. Good Luck.

Posted on Sep 04, 2009

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Every microwave oven has a line fuse. This fuse is designed to blow if too much current is drawn through the microwave circuitry. The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.
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Line Fuse


Every microwave oven has a line fuse. This fuse is designed to blow if too much current is drawn through the microwave circuitry. The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.
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If the microwave is not working the main control board may be defective. This is not common. When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


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If the microwave is not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
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Every microwave oven has a line fuse. This fuse is designed to blow if too much current is drawn through the microwave circuitry. The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.
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If the microwave is not working the main control board may be defective. This is not common. When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


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If the microwave is not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
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Main Control Board


If the microwave is not working the main control board may be defective. This is not common. When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


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If the microwave is not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
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Coffe unit has stopped working. Any help will do.


There are thermal fuses on the bottom. You must remove the bottom cover to see them under the heating tray. If the heating does not work the water will not heat and rise (no drip - nada). I posted some pics on my ebay store.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=150370700440&ssPageName=STRK:MESE:IT

TYPICAL FAILURE OF THIS MACHINE = THERMAL FUSE MALFUNCTION.
WHERE ARE THE THERMAL FUSES: There are 2 thermal fuses under the coffe tray and 1 fuse under the espresso boiler. (YOU WILL HAVE TO REMOVE THE BOTTOM COVER OF THE MACHINE). What this fuse does is regulate the temperature of the heating element so that everything doesn't melt (yep, I tried to bypass the fuse and found out the hard way..testing...testing..). Anyway, replacement for these thermal fuses are sold at RADIO SHACK for about $2.00. (Yep, only $2.00) If you open the bottom cover of the coffee maker and you will see the 2 fuses, they look like resistors. they are covered in a plastic tube to prevent damage. Clip them off I used a small wrench(radio shack) to pry open the small clamps that hold them, replaced them, then reclamped the new fuse back on.
REPLACEMENT FUSES: The thermal fuses have the watts/Amps and temperature stamped on them. There is 1 part that I use and has been working well for over a year ( over a year, yes this machine can last a long time!!).
The part # is Labeled - Raido Shack 270-1321 Thermal Fuse 438°F (226°C) 250VAC 10A (For heating devices like coffee makers and hair dryers). The temperature may vary + - a few degrees° on the label, from what I have seen.

HOW TO TEST THERMAL FUSES: These fuses are not only used for temp control but they also close the curcuit. If the fuse blows then it is open and will not heat. I use my ohmeter (put 1 prong at each end of the fuse) and if it reads open it means that the thermal fuse is bad, it has blown, there is no current running through it. I believe a light meter can check for continuity also and are much cheaper. Test by putting the test leads at each end of the fuse (1 prong at each end).If the light turns on then you are good, getting continuity. If you cannot get no light then it is bad. You can test your light fuse with a simple wire, touch each end and the light should go on, cut the wire in the middle and no light!!easy.
fyi. If your coffee does not get hot enough the fuse may need to be replaced also.
HOW TO READ THE OHMETER.


Know that a reading of OL means "over limit." That means the resistance is off the charts, and you have a break in the circuit. If you got an OL reading for the plug wires, you'd know there was a broken wire that needs replacing. In this case, we got an OL reading because the light switch is in the "OFF" position.

Read more: How to Use an Ohmmeter ' eHow.com http://www.ehow.com/how_2282412_use-ohmmeter.html#ixzz0zwX1LcJD




Consider that a low reading, anywhere from 0 to .5, indicates very little to no resistance. This means there's a continuity of current in the circuit. This is the reading you should get

Read more: How to Use an Ohmmeter ' eHow.com http://www.ehow.com/how_2282412_use-ohmmeter.html#ixzz0zwXjz6C0

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there are thermal protection switches under the warming plate there is usually 2 of them if one blows it will stop all function but usually not clock. youcan fix them yourself youfirst need to remove bottom to get under warming plate and there will be two little bullet shapped fuses made from copper youcan use a test meter to see if there is current passing through them both fuses must pass current through to work if one is bad and other is good it will not work . you can aquire the fuses on the web just do a google search for inline thermal protection switch and type name of pot or maker you have to get right ones .. but let me warn yout these are in place for a reason they usually only blow when there is a problem usually overheating problem . so it may be a wise choice to just replace product.just incase

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no its a thermal fuse you can by pass it for testing but run long witout it and may get fire other disc is thermal limiter which if it fails then thermal fuse blows i reccomend replacing both as thermal disc may be stuck in closed position

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