Question about Microwave Ovens

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3 microwave ovens in 18 months - all won't heat up - what is causing the recurring problem?

First model (Nu-Tec) lasted well over 3 years then it popped (almost the same noise one gets when metal is put in by mistake) while heating food one day and never heated again. Everything seems to be normal apart from the main task it is supposed to perform - heating. Bought a new microwave - Defy (DM0289) - this lasted just over a year and then exactly the same thing happened. Bought another one - same model - this time it only took 2 months for it to happen again. I live in Namibia in the middle of nowhere and there is a real shortage of experts in this field. After reading up on your website how to fix this problem I am not going to risk my life as the nearest hospital is an hours drive away. I just want to know why this is happening so frequently and if there is anything I can do to prevent it from happening to the next new microwave oven.
Please help

Carla

Posted by on

  • africat Feb 03, 2008

    Dear Totalwreck, Do people actually run microwave ovens without anything inside? What for? I am not one of these people, there was something in the oven every time all three ovens died on me. I do have a warranty for the newest one but in this country it works as follows: you take the appliance into the shop and tell them about your problem. They say we will have to send it to the supplier to be checked and repaired if possible. Only if it cannot be repaired, will we replace it. In the meantime you do without and this could take months. In the past I tried to return a fridge that never worked from the start and this is what I was told. Customer service and satisfaction comes in the form of take it of leave it. The microwave oven is matched to the electricity needs, both voltage and cycles and I definitely won't be buying the same model again but I am not sure the same thing isn't going to happen again. We have a lot of power failures here, do you think this could be the source of the problem? Although no power failures occurred when the 3 ovens stopped working. Do you think power surges could be the cause? Is there anything that can be done to make sure the next microwave oven lives a little longer than its predecessors?

  • africat Feb 03, 2008

    Dear Totalwreck, I am all for trying new ways to do things but common sense has to prevail at some stage. I am now going to go out and buy a new and different brand of microwave, as well as a surge protector and see what happens. Hold thumbs. If this doesn't work, I will get in touch. Thank you for taking the time to help. Regards, Carla

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Carla, Sorry to read of your troubles. Your unit that is only 2monts old should be under warranty, or did you receive any warranty?
What you describe as " the noise one gets when metal is put in by mistake". The noise is Arcing of Microwave Energy. Do not operate a Microwave Oven DRY (without something inside that will absorb the Microwave Energy. A Dry-Run Microwave Oven will feed-back upon itself and do damage.

If your unit is matched to the electric needs, both voltage and cycles, then I would not get another one of the same Model.

Posted on Feb 02, 2008

  • Totalwreck Feb 03, 2008

    Yes Carla, I repaired Microwave Ovens for 30years. I am now retired but still trying to give back through my knowledge. It would amaze you, the things that have been put in a Microwave. One University Student tried to dry some clothes in her small MW. The metal hooks arced and set the fabric on fire. Total loss.

    If your Microwave Oven : RUNS BUT DOES NOT HEAT. It can be broken down to failure of one of three components.



    1. HIGH VOLTAGE DIODE

    2. HIGH VOLTAGE CAPACITOR

    3. MAGNETRON



    Power Surges can cause failure of these components. Because they are in the High Voltage side a voltage surge would feed even HIGHER VOLTAGE from the High Voltage Transformer. A GOOD Surge Protector would help.


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