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Smart thermostat hookup help
Posted on 8/24/24 at 11:02 am
Posted on 8/24/24 at 11:02 am
My current thermostat is a battery powered Honeywell. The blue "c" wire is what is taped up in the circle. I hooked up the Amazon smart thermostat as instructed and there is no power to it. I checked with a voltmeter and there's nothing. I'm guessing something at the unit is not hooked up right?
I'm functionally regarded when it comes to electrical stuff. Other than installing light fixtures and ceiling fans I've never messed with it because I usually end up electrocuted.
I'm functionally regarded when it comes to electrical stuff. Other than installing light fixtures and ceiling fans I've never messed with it because I usually end up electrocuted.
4
Posted on 8/24/24 at 11:05 am to Loup
From what I remember installing my Nest, you don't HAVE to hook up the common wire. Can you manually charge the thermostat before plugging it up to see if that works?
Posted on 8/24/24 at 11:18 am to Loup
If you hooked up the common wire to the new thermostat, you like likely need to hook up the common wire on the other end to the control-circuit board in the furnace - air handler. It will be labeled on control board and next to the terminals for the other thermostat wires. I needed to do this on mine when I installed a smart thermostat. LINK
ETA: hook up the blue common wire to “B” on the new thermostat (photo) and do the same to the “C” terminal on the furnace-air handler control board.
ETA: hook up the blue common wire to “B” on the new thermostat (photo) and do the same to the “C” terminal on the furnace-air handler control board.
This post was edited on 8/25/24 at 8:05 am
Posted on 8/24/24 at 11:57 am to Ingeniero
quote:
From what I remember installing my Nest, you don't HAVE to hook up the common wire. Can you manually charge the thermostat before plugging it up to see if that works?
The Amazon thermostat doesn't have a battery option unfortunately
Posted on 8/24/24 at 11:57 am to CrawDude
quote:
If you hooked up the common wire to the new thermostat, you like likely need to hook up the common wire on the other end to the control-circuit board in the furnace - air handler. It will be labeled on control board and next to the terminals for the other thermostat wires. I needed to this on mine when I installed a smart thermostat. LINK
ETA: hook up the blue common wire to “B” on the new thermostat (photo) and do the same to the “C” terminal on the furnace-air handler control board
Thanks, I'll crawl up there tomorrow morning when it's cool and see if I can figure it out.
Posted on 8/24/24 at 2:07 pm to Loup
The blue wire is probably run, but not connected to the proper power source at the unit. Check that.
Posted on 8/25/24 at 3:50 pm to Skippy1013
quote:
The blue wire is probably run, but not connected to the proper power source at the unit. Check that.
+1. Thermostat wire is typically 6-8 conductors if I remember correctly so you will have unused ones in the cable. Just match the color from the control board in the furnace to the thermostat. Like others mentioned, if blue is available that’s the most common to utilize.
Posted on 8/25/24 at 4:22 pm to Loup
Can you share the Amazon thermostat you purchased? We bought Nest which was very user friendly to install, giving specific instructions on which cables to install based on the cables you have available. Nest has an internal battery that requires basically a boost before being installed completely and running off the A/C's power.
You also might have some luck on YouTube with diagrams.
You also might have some luck on YouTube with diagrams.
Posted on 8/26/24 at 6:31 pm to BilbeauTBaggins
I took the easy route out. I got the Amazon smart thermostat during the entergy free deal. My brother got the sensi. We swapped. The sensi works without a C wire. I probably wouldn't have climbed up into the attic until October otherwise.
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