Microwave oven does not heat up: what is the reason and why it does not work?

Even the most expensive and reliable technique sometimes fails, and microwave ovens are no exception. If the appliance is out of order, purchased shortly before the failure, problems usually arise - its repair or exchange under warranty. Everything is much more complicated, if the technique is used for a long time and the warranty periods are long gone. Microwave does not heat, sparks, smokes - each of these breakdowns is a reason that you can find and correct as possible. In an extreme case, you can call the master. Consider the typical failure of microwave ovens.

Microwave sparks

Possible Cause - is out of order mica plate: it crumble when trying to clear it with the naked eye visible cracks or other defects on the plate is a thick layer of fat. This damage can be eliminated by yourself - sold separately mica sheet, unscrew the old plate, cut from a sheet of a new sample and its tie to the old place.

Microwave oven smokes at work

If the microwave much buzzing, smokes, does not work or emits the smell of burnt wiring, the possible cause of the fault - the output transformer failure. The defect may be power surges in the network, manufacturing defects, short circuit passage transformer, a large load. In this case, the device is removed from the casing, check the resistance of the windings: a primary, secondary, filament. If they are okay, and the ohmmeter shows the resistance in the normal range, the possible reason why the oven does not work, it may be a lack of voltage. It is checked by connecting a multimeter to the terminals of the primary winding, turning the device into the network and running the heating program.

Transformer necessary to change on their own only if the person has experience with electricity, as he even capable of holding off some charge.

Blown fuse

Microwave hums, but does not heat? Or even no signs of life? Perhaps one of the burned fuse. If it is not included, then a possible cause - the mains fuse blown fuse or control panel. If the buzzing, but no heating - it is possible that the high-voltage circuit breaker tripped in a protective casing.

This damage is easy to confirm or deny, is sufficient to remove the housing and inspect data elements. In the case of a blown fuse will turn black, the filament restarts his. Enough to replace this item with a new one to microwave earned.

defective magnetron

In this case, the microwave oven does not heat up, but the buzzes and hums. To determine if a possible cause of the fault lies in the broken magnetron, it is necessary to open the casing, unplug the magnetron terminals of the power supply circuit and touch them ohmmeter probes. Proper device must give resistance to 2-3 ohm fault does not respond to touch. If the experiment shows that the magnetron is faulty it must be replaced. As practice shows, replacing, in many cases impractical, because the new part will be worth up to 60% of the cost of a new microwave.

Feedthrough capacitors breakdown

If there is this trouble, microwave oven does not heat, but is showing signs of life, buzzing, crackling, buzzing. Check capacitors same ohmmeter, connecting the probes to a terminal of the capacitor on the one hand, on the other - with the magnetron body. If the tester gives any resistance there is a breakdown. If one defective capacitor - it can be replaced, if some - will have to change the whole magnetron.

other faults

In addition to these there are a number of circumstances, why the microwave oven can not work. It happens that because of the poor quality of welding comes off one of the contacts. Burn out the power cord or plug short-circuit. Deformed and the door closes tightly. It happens that the network voltage drops below 200 volts and the device at the time ceases to work.

Be that as it may, do repairs at home is only in the case when the owner is confident in his knowledge and skills. Otherwise it is better to show the microwave master, that he gave his opinion. Especially not every malfunction can be immediately eliminated.

(20 estimates mean: 4,50 of 5)

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