# diyBMS V4.4 module failure

**URL:** <https://community.openenergymonitor.org/t/diybms-v4-4-module-failure/26547>\
**Category:** Hardware\
**Tags:** diybms\
**Created:** [11 August 2024 19:38 UTC](https://community.openenergymonitor.org/t/diybms-v4-4-module-failure/26547 "2024-08-11T19:38:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Muxer\_Baker](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/muxer_baker/32/25723_2.png) [@Muxer\_Baker](https://community.openenergymonitor.org/u/Muxer_Baker)\
**Post date:** [11 August 2024 19:38 UTC](https://community.openenergymonitor.org/t/diybms-v4-4-module-failure/26547/1 "2024-08-11T19:38:46Z")

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Hi All,

I have a batch of diyBMS V4.4 modules I got used off someone on this forum, however one of the modules has developed a failure.

When I hooked up the 6, I noticed one of them wasn’t blinking happily away like the other 5. I went to touch it and noticed it was red hot.

On investigating this further, the cause is the MCU itself. It’s basically just a short at the minute for some reason.

Does anyone know if this is a common fault? Should a simple MCU replacement fix it?

J