Masterbuilt MB20073519

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uncwseaman

Newbie
Original poster
Sep 30, 2024
2
1
Morning! I have a Masterbuilt MB20073519 electric smoker. It stopped working awhile back, I have changed out the control circuit board (it was fried/melted), Replaced the High Limit/temperature sensors, and replaced all of the wire connectors, but it still doesn’t work. It will turn on, and then I can start it, but when it reaches about 80degrees it just shuts off… any ideas on what could be the issue?
 
Morning! I have a Masterbuilt MB20073519 electric smoker. It stopped working awhile back, I have changed out the control circuit board (it was fried/melted), Replaced the High Limit/temperature sensors, and replaced all of the wire connectors, but it still doesn’t work. It will turn on, and then I can start it, but when it reaches about 80degrees it just shuts off… any ideas on what could be the issue?
Tagging tallbm tallbm . He’s your guy for everything MES electronics
 
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Morning! I have a Masterbuilt MB20073519 electric smoker. It stopped working awhile back, I have changed out the control circuit board (it was fried/melted), Replaced the High Limit/temperature sensors, and replaced all of the wire connectors, but it still doesn’t work. It will turn on, and then I can start it, but when it reaches about 80degrees it just shuts off… any ideas on what could be the issue?
Hi there and welcome!

Seems you changed all the major issues.
Things to still check...

The high limit temp switches are very very delicate. If you wiggled the connector tabs at all at the base of the switch then it is going to melt down on you at some point.
I would check that again and see if it is showing signs of melting down. If so then you know it's a the problem.

For troubleshooting purposes you can just wire around it but WARNING this is removing the safety switch so you accept responsibility for doing so.

If you wire around the safety switch and it still shuts down on you then the controller (up top) may be the culprit.
There is a chance that the lower circuit board you replaced may have been faulty and causing issues but haven't heard of that happening to anyone.

Anyhow. Wiring around that safety switch will help you narrow things down a bit more to see which of those 3 pieces (new circuit board, new safety switch, or controller) are failing you :D

I hope this helps :D
 
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