Microwave with electrical smell - repair or replace?

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Discussion Overview

The discussion revolves around the issue of a ten-year-old microwave oven emitting a burnt electrical smell during operation. Participants explore whether it is sensible to repair the appliance, particularly if the problem lies with the circuit board, or if it would be more reasonable to replace it entirely. The conversation touches on aspects of appliance longevity, repair costs, and safety concerns.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant questions the practicality of repairing the microwave if only the circuit board is malfunctioning, given its age and the trend of disposable electronics.
  • Another suggests that the smell could be due to a faulty component that might be replaceable by an electrician, emphasizing the potential contamination of internal parts from kitchen dust and moisture.
  • A later reply mentions the dangers of high voltage within microwaves and advises hiring a professional or opting for a new unit, noting that microwaves are often cheaper than repair costs.
  • One participant reflects on their previous microwave lasting over twenty years, suggesting that less frequent use might justify a longer lifespan for the current model, despite the odor.
  • Another participant warns that a common cause of burnt smells could be shorting turns on the high voltage transformer, which poses a fire risk, ultimately recommending replacement over repair.

Areas of Agreement / Disagreement

Participants express differing views on whether to repair or replace the microwave. While some suggest repair might be possible, others strongly advocate for replacement due to safety concerns and cost-effectiveness. No consensus is reached on the best course of action.

Contextual Notes

Participants note the potential dangers of high voltage components and the uncertainty surrounding the specific cause of the smell. There are also references to the general cost dynamics of repairs versus new appliances, but no definitive conclusions are drawn regarding the specific situation.

JT Smith
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Our ten year old microwave oven has started to emit a slight burnt electrical smell when it's running. The display has been acting a bit odd for the last few years and it's a cheap, modern day piece of disposable electronics. But still the frugal person in me wonders: If the main working parts of the oven are fine and it's just the circuit board that's malfunctioning is it even halfway sensible to try and repair it? Or would any reasonable person simply chuck it and buy a new one?
 
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Maybe it is a faulty component that smells, and it can be replaced by an electrician.

It is possible that dust, smoke, and moisture, from the kitchen have contaminated the internal surfaces of the high voltage electrical parts. A good cleaning by an electrician is really the only choice. The internal voltages are very dangerous.

You will need to hire an electrician, or buy a new microwave.
Microwaves are now cheaper than electricians.
 
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Our microwave sees relatively little use so it seems reasonable that it would last longer than average. Our previous one was over twenty years old before it gave up the ghost. The current one works fine. It just has an odor.

Baluncore said:
Maybe it is a faulty component that smells, and it can be replaced by an electrician.

It is possible that dust, smoke, and moisture, from the kitchen have contaminated the internal surfaces of the high voltage electrical parts. A good cleaning by an electrician is really the only choice. The internal voltages are very dangerous.

You will need to hire an electrician, or buy a new microwave.
Microwaves are now cheaper than electricians.

I'm aware of the relative cost of hiring a repairman versus a new microwave. That's been true for a long time. I was wondering if it's worth opening it up and seeing if it's something on the circuit board that has fried. Since it was behaving oddly it seemed to me like a possibility. I've had it open before (to remove the piezo). If it's the primary works that are failing then into the pile it goes. There's no way I'm going to mess with the high voltage.
 
JT Smith said:
Our ten year old microwave oven has started to emit a slight burnt electrical smell when it's running.
JT Smith said:
I was wondering if it's worth opening it up and seeing if it's something on the circuit board that has fried.
Sorry, I need to close this thread. One common cause of a burnt electrical smell from a microwave oven is progressively shorting turns on the high voltage transformer feeding the magnetron. That is a bad thing, and could lead to a fire modulo the fuse blowing. Please take this advice and replace the inexpensive appliance:
Baluncore said:
Microwaves are now cheaper than electricians.
 

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