# Exposed wires on the outside of a furnace

**URL:** <https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568>\
**Category:** Inspecting HVAC Systems\
**Created:** [March 22, 2021, 4:05pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568 "2021-03-22T16:05:34Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![mreed11](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/mreed11/32/180510_2.png) [@mreed11](https://forum.nachi.org/u/mreed11)\
**Post date:** [March 22, 2021, 4:05pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568/1 "2021-03-22T16:05:34Z")

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I’m doing my mock inspections and looking at another thread, it sounds like it’s OK that these wires are nut only. This is the wall of the furnace.  
Thanks for the help!

 ![IMG_0053](https://global.discourse-cdn.com/internachi/original/3X/7/a/7aae782c5d3c91244fcea1b2d5e1aaf89a32c14a.jpeg)

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**Author:** ![dwigger](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/dwigger/32/58670_2.png) [@dwigger](https://forum.nachi.org/u/dwigger)\
**Post date:** [March 22, 2021, 4:08pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568/2 "2021-03-22T16:08:58Z")

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Those are your thermostat control wires, low voltage, no problem.

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**Author:** ![jmoore5](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/jmoore5/32/57038_2.png) [@jmoore5](https://forum.nachi.org/u/jmoore5)\
**Post date:** [March 22, 2021, 4:34pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568/3 "2021-03-22T16:34:43Z")

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You will see this many times

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**Author:** ![jmckee](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/jmckee/32/211009_2.png) [@jmckee](https://forum.nachi.org/u/jmckee)\
**Post date:** [March 22, 2021, 4:37pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568/4 "2021-03-22T16:37:26Z")

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what they said…

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**Author:** ![rkenney](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/rkenney/32/405447_2.png) [@rkenney](https://forum.nachi.org/u/rkenney)\
**Post date:** [March 22, 2021, 4:53pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568/5 "2021-03-22T16:53:09Z")

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See this all the time. You might want to change your thermostat one day.  
Typical wiring -

 ![thermostat-wiring-colors-to-labels](https://global.discourse-cdn.com/internachi/original/3X/6/9/690355656af0f78c5035eba6bedc98fd0efe850e.jpeg)

Son gave me an Ecobee thermostat one year. I can now change my thermostat setting from my phone. Whoopie!

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**Author:** ![mreed11](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/mreed11/32/180510_2.png) [@mreed11](https://forum.nachi.org/u/mreed11)\
**Post date:** [March 22, 2021, 6:18pm UTC](https://forum.nachi.org/t/exposed-wires-on-the-outside-of-a-furnace/195568/6 "2021-03-22T18:18:16Z")

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Thank you gentlemen!