C-Wire for thermostat
Home Improvement Asked by Adkihn on May 7, 2021
My furnace is a gmp075-3
There is an existing unused Blue wire coming from the thermostat to the furnace area but not attached to anything. (upper blue wire in 2nd image)
Can I just connect the upper blue wire on the outside of the furnace to the lower blue wire going to the screw on the top left of the furnace panel?
The transformer is grounded to the screw on the right of the transformer, do I need to ground my C wire from the Thermostat to the same spot as the transformer or can I just connect the existing blue/c wires as is? (ie grounding the thermostat C wire by just pigtail the two blue wires outside furnace)
One Answer
Yes that blue wire sticking out of the cabinet looks like it's intended to be used that way. To verify use a volt meter to measure AC volts between the blue and the red wires. It should be somewhere in the range 24-30 volts.
Correct answer by Greg Hill on May 7, 2021
Add your own answers!
Ask a Question
Get help from others!
Recent Answers
- Jon Church on Why fry rice before boiling?
- Joshua Engel on Why fry rice before boiling?
- Peter Machado on Why fry rice before boiling?
- Lex on Does Google Analytics track 404 page responses as valid page views?
- haakon.io on Why fry rice before boiling?
Recent Questions
- How can I transform graph image into a tikzpicture LaTeX code?
- How Do I Get The Ifruit App Off Of Gta 5 / Grand Theft Auto 5
- Iv’e designed a space elevator using a series of lasers. do you know anybody i could submit the designs too that could manufacture the concept and put it to use
- Need help finding a book. Female OP protagonist, magic
- Why is the WWF pending games (“Your turn”) area replaced w/ a column of “Bonus & Reward”gift boxes?