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Toastmaster TM1046U Global Design heats up for only a few seconds

I can't find any info online about the Toastmaster Global Design toaster (model 1046U), which appears to be from the 1990s. The problem is that it heats up fine and stays down, but only for about 10 seconds, then it turns off. This happens regardless of darkness setting. It's a cool toaster that I'd love to be able to fix and use. Thanks in advance!

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Hi,

You may have to open it up and check what type of thermostat it has.

Some are just the bi-metal type where as they heat up the two metal strips move away from each other and open the circuit for the power to the heater elements. Turning the setting alters the amount of travel required i.e. the time it takes. (examples only to show what they might look like)

Others use an electronic timer circuit which is adjusted by the darkness setting control.

Hopefully if you open it up you'll be able to spot it easily and maybe with luck there will be some part information stamped on the thermostat to help find a replacement part.

Post some images of the control board, thermostat etc back here. Here's how to add images to your question in ifixit Voeg afbeeldingen toe aan een bestaande vraag

Be safety aware when working on toasters as there's exposed lethal AC voltage present if the power is connected. Always disconnect the power when working in a toaster unless you're electrically testing it and you know what you're doing.

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Thanks for the response. I've added photos to the original post.

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@Mister Brennan

Can't quite work out where the darkness control connects to so that it changes the length of "on" time.

There is an LM324H op amp on the board so I think a sensor input would be connected to it and also the darkness control as well. so that when the two "inputs" are the same or within whatever range it has been designed for i.e. the darkness control component and the temp sensor or whatever sensor is used, the IC would signal to turn off the power.

This is how I think it would work so you would either have to find the sensor or what the darkness control connects to and check if they're both OK.

Best that I can think of at this stage.

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I was able to find a bit more info on this model, and it apparently has an auto shut-off circuit as a safety feature. I wonder if that circuit is kicking in for some reason, although I wouldn't know how to figure that out.

I appreciate your time and help.

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