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Small blue flash when toaster is finished

I just bought a 2nd hand toaster, it toasts fine, but there is often a little blue flash as it finishes, or if I press the cancel button. I’m not sure if this is a problem or not, I have had a couple of other devices ( a heater and a kettle) that did the same thing, so is it a problem?

Also, I’ve bought 2nd hand electrical stuff before from this shop, and they usually have a “passed safety testing” sticker, but this item doesn’t, is that a worry?

Update (08/13/2021)

The blue flash is coming from inside the toaster, and no I don’t have DMM.

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Where is the blue flash coming from, the toaster or the power outlet as you said that it also occurred with other appliances?

If the blue flash is coming from the power outlet (have you tried other outlets?) then it may be due to a faulty outlet, get an electrician to check it out.

If from the appliance, do you have a DMM (digital multimeter) and know how to use it?

If not, do not use the toaster until it is proven electrically safe to use.

If so use it to check that the toaster is electrically safe by disconnecting the toaster from the power supply and then connecting the meter’s test leads between each of the two power pins (active and neutral) on the power cord plug of the toaster (one at a time) and any metal point on the toaster itself. Manually operate the toaster to simulate that it is operating - operate the bread holder lever and then check that there is no continuity i.e. open circuit (OL), shown on the meter when using its Ohm’s function.

If it tests OK then a blue flash is coming from the toaster usually indicates that there is still power being applied across a switch etc when it opens and there shouldn’t be. The toaster would need to be opened and further inspected to find out why.

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The blue flash is coming from inside the toaster, and no I don’t have DMM.



Maybe take it back to where you bought it from and ask if they can check if it safe.

After it has been checked then it can be opened and inspected for any obvious signs e.g. flash marks or burn marks indicting where the blue flash is emanating from.

If no obvious signs then a DMM would be required to start electrical testing of the circuit inside the toaster


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rugarpho будет вечно благодарен.
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