Abstract

Kirk and Fred discussing a recent failure of an electric range/oven and the troubleshooting, FA and repair. See the show notes to see photos and details of the failure analysis.

Key Points

Join Kirk and Fred as they discuss the process of finding the cause of the range/oven failure. You can see below the details of the failed Al-E capacitor location on one of the two control boards.
Topics include:

• Could the problem have been tin whiskers between the two very close circuit boards (as you can see in the photos below) ?
• Could it have been some foreign object or bug that had crawled into the spaces between the backs of the two circuit boards ?
• Kirk discovered that the control module was a common model used for many different brands of ovens, but the first one ordered was almost completely functional but was missing the correct layout of the front panel.
• Potential investigations and experiments if we worked for one of the manufacturers that found this problem to perform corrective action.

Enjoy an episode of Speaking of Reliability. Where you can join friends as they discuss reliability topics. Join us as we discuss topics ranging from design for reliability techniques to field data analysis approaches.

SOR 670 Kitchen Appliance FailureKirk Gray

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Show Notes

Please click on this link to access a relatively new analysis of traditional reliability prediction methods article from the US ARMY and CALCE titled  “Reliability Prediction – A Continued Reliance on a Misleading Approach”

For more information on the newest discovery testing methodology here is a link to the book “Next Generation HALT and HASS: Robust design of Electronics and Systems” written by Kirk Gray and John Paschkewitz.