Question about DeLonghi MW 605 Convection/Microwave Oven

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My microwave is not heating up model no.wd900asl25r11-k4c

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Check the hv fuse

Posted on Feb 17, 2010

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1 Answer

Cook temp not working


follow this steps and test with VOM. God bless you

Diode


The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven. A regular meter with a diode checker will not work to check these diodes. You have to use a meter with a 9 volt battery or put a 9 volt battery in series with the diode to check it.

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Door Switch


If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.

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Help me find my model number
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Magnetron


If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.

Enter your model number to see parts for your microwave.

Help me find my model number
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High Voltage Capacitor


If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.

Enter your model number to see parts for your microwave.

Help me find my model number
picunavailable175.jpg

High Voltage Transformer


If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. When a high voltage transformer fails it will usually arch and have a burning smell.

Enter your model number to see parts for your microwave.

Help me find my model number
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Thermal Fuse


If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.

Enter your model number to see parts for your microwave.

Help me find my model number
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Thermoprotector


If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Enter your model number to see parts for your microwave.

Help me find my model number
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Main Control Board


If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually a faulty door switch or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magn
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Apr 02, 2013 | Maytag MMV4184A 1000 Watts Microwave Oven

1 Answer

Morphy richards oven is not heating and not cooking anything


please proceed according and fix it. God bless you

Diode

The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven. A regular meter with a diode checker will not work to check these diodes. You have to use a meter with a 9 volt battery or put a 9 volt battery in series with the diode to check it.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

Door Switch

If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

Magnetron

If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

High Voltage Capacitor

If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

High Voltage Transformer

If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. When a high voltage transformer fails it will usually arch and have a burning smell.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

Thermal Fuse

If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

Thermoprotector

If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.
Enter your model number to see parts for your microwave.
Help me find my model number
picunavailable175.jpg

Main Control Board

If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually a faulty door switch or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.

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Mar 01, 2013 | Morphy Richards Microwave Ovens

1 Answer

My microwave GE model # JVM1440WH04 spacemaker has no heat coming out of it. My husband heated microwave lasagna in it last, everything works except for the heat, any solutions?


Push the microwave door tightly closed. The computer will not start cooking until the door is closed for safety reasons. Some models of microwave will give a warning on the screen if the door is open.
2

Ensure you have programmed a heat setting, entered a cooking time and pressed the "Start" button on the microwave's keypad. Check that the microwave is not set to "Defrost" mode.
3

Unplug the microwave and wait for one minute. This measure will reset the microwave's internal computer if it has frozen or scrambled. Plug the microwave back in and try again.
4

Ensure the keypad lock mode is inactive. Most microwave ovens have a lockout feature that prevents children from starting the microwave while unsupervised. Lockout mode is usually deactivated by holding down the button that bears a padlock symbol

Oct 05, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

My brand new Sunbeam microwave model SGG5701 will not heat. it appears to be working but wont heat food or defrost


Can not find a fuse for a Sunbeam microwave model SGG5701. Where can I find one? My microwave went out after only 3 months of having it.

Aug 15, 2010 | Sunbeam SBM1000 Microwave Oven

1 Answer

Kenmore microwave model 721.80033700 won't heat


Hi,


Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101


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Jul 24, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

My microwave has stopped heating up! model #721.80043700 anybody having this problem? Do you know how to fix it?


Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

ytu53w

May 15, 2010 | Kenmore 62622 Microwave Oven

1 Answer

My microwave has stopped heating up! model #721.80043700, anybody having this problem? Do you know how to fix it?


My microwave has stopped heating up! model # NN-S540BFW PANASONIC ANYONE ELSE HAVING THIS PROBLEM? DO YOU KNOW HOW TO FIX IT?

Mar 28, 2010 | Kenmore 62622 Microwave Oven

1 Answer

Maytag microwave oven model mmv4205bab not heating food


maytag microwave model # mmv4184aaq operates normally but will not heat food or water

Mar 07, 2010 | Maytag MMV4205 Microwave Oven

1 Answer

Loud pop and microwave doesn't heat anymore


I have a GE Profile Spacemaker model JVM3670WF001, purchased I think in 2003. Pop sound, no Heat. Light goes on, carousel goes around,
Repair or new microwave

Jun 03, 2009 | GE Profile Spacemaker Over-the-Range...

1 Answer

My GE microwave, model #WES1450DM1BB; serial #SM908139U, shows


When I try and heat some food, the microwave runs but doesn't heat anything, its a model wes1450dm1bb

Mar 15, 2009 | GE XL1800 1100 Watts Microwave Oven

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