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Model TR R 4411694 wont heat , fuse blown inside ?

Model TR R 4411694 all read outs working but wont heat

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There are severl things inside that can cause this trouble .. if the turn table is working and the lights and fan work then you could have a bad magnitron, diode, high voltage capacitor or transformer .. there is also a high temprature cut out that could have tripped .. usually that happens if the unit was run without a load inside or if the air flow was blocked by dust or being too close to something .. the controllers output triac could also be bad .. but none of these things can be serviced by most customers .. there is lethal voltage and currents inside the unit ... you can test the thermal switch (with power disconnected) but thats about all unless you have special skills .. there are shops that repair microwave ovens but unless its a really good one it might be cheeper to buy a new one ..new microwaves seem to be priced very low right now ..

Posted on Oct 05, 2009

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There is usually a 125V, 20 AMP line fuse inside the microwave, mounted at the point where the power cord enters the back of the unit. Unfortunately, you will need to uninstall the oven (if this is an over the range model), UNPLUG it and remove the exterior case to access. The case comes off in various ways depending on manufacturer and model. Parts are available at any of the following webistes: searspartsdirect.com pcappliancerepair.com appliancepartspros.com repairclinic.com The first three sites include illustrated parts listings that can help you locate and properly identify any parts you may need. If the model number you listed this question under is correct, the line fuse is connected in line with the power cord inside the unit and is listed as part of item 47 in the parts listing (part number WB27X10388). This microwave oven is also equipped with various thermostats that (if blown) can cause similar symptoms to that of a blown line fuse. So, if the line fuse is NOT blown, you may want to check all the thermostats to see if they are still good. You will need to remove each one and measure across the terminals with a multimeter. A good reading is 0 ohms. NOTE: The various thermostats are listed as items 27, 61, 74, and 77 in the parts illustration. The thermostats typically will trip if the oven cavity has been overheated. Cooking items that are high heat producers such as popcorn or baked potatoes in rapid succession can often cause this problem. Allowing the oven cavity to cool a few minutes with the door open between cooking can prevent this from occurring.


If the line fuse is blown, you can usually purchase a box of fuses at a hardware store for just a little more than what the manufacturer charges for a single fuse. 125V, 20AMP Ceramic Slow Blow fuses are recommended.

If you have any questions, or need additional assistance troubleshooting, please post back and let me know. I hope you find this information helpful.

NOTE: Make sure you take any resistance readings with the microwave UNPLUGGED and the component under test isolated (removed) from the circuit. These ovens can blow a fuse by simply sitting idle. This can occur from any power fluctuations, brown outs, voltage spikes, etc. Or, it could be the symptom of a component that may have failed. If you find the internal fuse blown and replace it, only to have it blow again, you have a more significant problem than a simple blown fuse.

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1 Answer

This model just stopped working while heating food up. Now cannot get even the power to register when you plug it in. Is this doen for?


There is usually a 125V, 20 AMP line fuse inside the microwave, mounted at the point where the power cord enters the back of the unit. Unfortunately, you will need to uninstall the oven (if this is an over the range model), UNPLUG it and remove the exterior case to access. The case comes off in various ways depending on manufacture and model. If the model number you listed this question under is correct, the line fuse is connected in line with the power cord inside the unit and is listed as part of item 4 in the parts listing (part number STD384200).

If the line fuse is blown, you can usually purchase a box of fuses at a hardware store for just a little more than what the manufacturer charges for a single fuse. 125V, 20AMP Ceramic Slow Blow fuses are recommended.

If you have any questions, or need additional assistance troubleshooting, please post back and let me know. I hope you find this information helpful.

NOTE: Make sure you take any resistance readings with the microwave UNPLUGGED and the component under test isolated (removed) from the circuit. These ovens can blow a fuse by simply sitting idle. This can occur from any power fluctuations, brown outs, voltage spikes, etc. Or, it could be the symptom of a component that may have failed. If you find the internal fuse blown and replace it, only to have it blow again, you have a more significant problem than a simple blown fuse.

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1 Answer

I think I need to replace a fuse in my Whirlpool Microwave oven, but I can't find where the fuse is located?! Help!


There is usually a 125V, 20 AMP line fuse inside the microwave, mounted at the point where the power cord enters the back of the unit. Unfortunately, you will need to uninstall the oven (if this is an over the range model), UNPLUG it and remove the exterior case to access. The case comes off in various ways depending on manufacture and model. If the model number you listed this question under is correct, you have THREE possibilties that may cause a complete loss of power: 1. Line fuse 2. The Oven Cavity Thermostat. 3. Thermal Cut-Out (Thermostat) for the Magnetron. The line fuse is connected in line with the power cord inside the unit and is listed as part of item 28 under the "Interior and Ventilation" parts heading. The thermostat for the oven cavity is listed as item 29 (part number 8183703) under the same parts heading. The thermostat for the Magnetron is listed as item 15 under the "Magnetron and Turntable Parts" heading. The part number is 8183698.

I would recommend you check the fuse, first. This the easiest and least expensive repair. It is also the most common. If you managed to overheat the oven any time recently, you may want to check the thermostat(s) to see if it is still good, next. They should read 0 ohms when measured out of the circuit across the terminals.

If the line fuse is blown, you can usually purchase a box of fuses at a hardware store for just a little more than what the manufacturer charges for a single fuse. 125V, 20AMP Ceramic Slow Blow fuses are recommended.

If you have any questions, or need additional assistance troubleshooting, please post back and let me know. I hope you find this information helpful. NOTE: Baked potatoes, steamed vegetables and popcorn are notrious for causing high humidity and/or overheat conditions in an oven cavity. If you find any of the thermostats tripped or blown, remember to allow the oven cavity to cool by leaving the door open between cooking items. This should only take a few minutes. Repeatedly heating items one after the other can cause high humidity and heat which may cause the thermostats to trip. Some of these thermostats reset themselves, others you need to replace.

NOTE: Make sure you take any resistance readings with the microwave UNPLUGGED and the component under test isolated (removed) from the circuit. These ovens can blow a fuse by simply sitting idle. This can occur from any power fluctuations, brown outs, voltage spikes, etc. Or, it could be the symptom of a component that may have failed. If you find the internal fuse blown and replace it, only to have it blow again, you have a more significant problem than a simple blown fuse.

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1 Answer

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HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

(((The fuse is located inside the unit along side the magnetron)))

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1 Answer

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(((The fuse is located inside the unit along side the magnetron)))

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This microwave seems to have been haphazarly been recommended by Consumer Reports, but it is terribly unreliable. The turntables break when popping popcorn, the main fuse repeatedly blows, and they also stop heating.

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Geno

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