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re: Need "C"Wire (5th wire) for Wifi thermostat.

Posted on 6/2/17 at 12:09 pm to
Posted by CAD703X
Liberty Island
Member since Jul 2008
77947 posts
Posted on 6/2/17 at 12:09 pm to
quote:

thanks for your time bud, I will go poke around this weekend, if all else fails surely an AC guy wont kill me to bad on installing C wire.


more than likely they'll just pull a new cable and you're looking at maybe $150 for that depending on how far away your thermostat is from the actual unit.
Posted by Citica8
Duckroost, LA
Member since Dec 2012
3665 posts
Posted on 6/2/17 at 2:04 pm to
Had the same problem last year. Got a new AC installed this spring and had him pull a new thermostat wire.

I know that doesn't help
Posted by highpockets
Lafayette
Member since Feb 2015
1894 posts
Posted on 6/2/17 at 3:43 pm to
quote:

more than likely they'll just pull a new cable and you're looking at maybe $150 for that depending on how far away your thermostat is from the actual unit.


the wire(18-5) is there just needs to be connected to control panel in the attic.
Posted by highpockets
Lafayette
Member since Feb 2015
1894 posts
Posted on 6/6/17 at 7:29 pm to
It is done, connected it to common wire connected to compressor. So far so good. Found a loose connection while I was packing wires back into unit in the attic, glad I noticed it.

It is a Honeywell RTH6500 if anyone cares... 85 bucks from Amazon. Cheapest wifi I could find that works with Alexa.
Posted by CAD703X
Liberty Island
Member since Jul 2008
77947 posts
Posted on 6/6/17 at 10:35 pm to
you don't want to get me started on those Honeywells. I have installed about a dozen of the touchscreen WiFi units for friends and family.

I've got about a 60 page thread on this on the tech board.

You're going to love your Honeywell.
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