# Simple Emergency Override

**URL:** <https://community.homey.app/t/simple-emergency-override/33075>\
**Category:** Devices\
**Created:** [July 31, 2020, 7:22pm UTC](https://community.homey.app/t/simple-emergency-override/33075 "2020-07-31T19:22:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Lav\_Senoj](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/lav_senoj/32/16940_2.png) [@Lav\_Senoj](https://community.homey.app/u/Lav_Senoj)\
**Post date:** [July 31, 2020, 7:22pm UTC](https://community.homey.app/t/simple-emergency-override/33075/1 "2020-07-31T19:22:43Z")

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I find the Sonoff TH16, with a sensor, the perfect energy saving device for my water pipe supply heat tape system. My problem is the reliability of any device, including Sonoff. If it fails, my pipes freeze and burst.

I am looking for a simple emergency ovverride circuit. Will either of these work or will I need to install this work or do I need to install a diode on the load side of each wifi switch?

 ![Override Schematic](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/b/d/bd00b4380662cb52802b7115ffdf2632805f4776.jpeg)

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**Author:** ![JPe4619](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/jpe4619/32/9017_2.png) [@JPe4619](https://community.homey.app/u/JPe4619)\
**Post date:** [July 31, 2020, 8:55pm UTC](https://community.homey.app/t/simple-emergency-override/33075/2 "2020-07-31T20:55:30Z")

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Both circuits can be used as override, don’t use diodes in a.c. circuits.

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**Author:** ![Lav\_Senoj](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/lav_senoj/32/16940_2.png) [@Lav\_Senoj](https://community.homey.app/u/Lav_Senoj)\
**Post date:** [July 31, 2020, 11:46pm UTC](https://community.homey.app/t/simple-emergency-override/33075/3 "2020-07-31T23:46:18Z")

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Thanks! I will let you know if I burn my cabin down. 🙂