quote:

Originally posted by sigarms229:
I have an Emerson Sensi wifi thermostat that I am VERY happy with! Bought it last June and I have zero complaints thus far.

I also have this in two different houses and I am very happy with both.

I have this thermostat and I love it.

https://www.amazon.com/Honeywe...Amazon/dp/B00FLZEQH2

It's easy to use and program and I can control it with my computer or smart phone.

Thanks for all the advice, fellas. I ended up going with Excam_Man's recommendation and ordered a Honeywell FocusPro 6220D1028 at the local plumbing & heating supply. Should arrive in a couple days.

I'll let you know how installation goes.

I vote for NEST, simple setup and it learns your patterns and adjusts accordingly. Very happy with ours. Had one minor hiccup during install, but their tech support identified the issue quickly and not a problem since.

Well I've run into difficulties installing the new thermostat. I'm trying to run the air conditioning but the thermostat "cooling on" display is flashing which indicates that the "compressor protection" feature is forcing the compressor to "wait a few minutes" before starting. However the indicator light only stops flashing for a second before it goes back to flashing mode and the air conditioner never turns on.

I followed the installation instructions and here is how my handy work looks. Does anyone see something wrong with this setup compared to the one in my original post?

This message has been edited. Last edited by: 12GA,

Bought a Nest. Returned it for a Honeywell, which has worked very well. App links nicely w/your cell & very easy to control/setup.

Whats the letter the red wire is connected to, in the first pic it looks like the red is going to the r/rc.

quote:

Originally posted by JasonATI:
Whats the letter the red wire is connected to, in the first pic it looks like the red is going to the r/rc.

Red is connected to RH with a red jumper wire going from RH to RC in the 1st pic. Red is going to C in the most recent pic. There is a jumper already installed.

What about in the second pic?

quote:

Originally posted by JasonATI:
What about in the second pic?

Going to C in the most recent pic.

12GA, RED wire connects to the Rc or R with the jumper in place.

Red to R ( power 24v )
Yellow to Y ( cooling )
White to W ( heat )
Green to G ( fan)

quote:

Originally posted by hvactech:
12GA, RED wire connects to the Rc or Rh with the jumper in place.
The Rc & Rh is for dual transformer systems back in the day.

Isn't it unusual for a residence to have dual transformers? The home was built in 1970. I tried hooking it to the R post but there didn't seem to be enough room for the wire with the jumper already there.

rare to have dual transformers. The option is still available on thermostats. Must have the jumper in-place.

On a call for cooling the thermostat connects the R to Y and G
On a call for Heat, R is connected to W and G is controlled by the furnace.

quote:

Originally posted by hvactech:
rare to have dual transformers. The option is still available on thermostats.

If I understand correctly, I should disconnect the red from the C post and connect it to th RC post? Also, there is an unused and unstripped blue wire tucked in the wall. What do you suppose that would be for?

I tried hooking it to the R post but there didn't seem to be enough room for the wire with the jumper already there.[/QUOTE]

It will go. Turn head slightly toward your weak eye, squint dominate eye just so slightly.
Don't over tighten, striped screw is possible.

quote:

Originally posted by 12GA:

quote:

Originally posted by hvactech:
rare to have dual transformers. The option is still available on thermostats.

If I understand correctly, I should disconnect the red from the C post and connect it to th RC post? Also, there is an unused and unstripped blue wire tucked in the wall. What do you suppose that would be for?

Correct. Move the Red wire from C to R .
The Blue is just a spare.

quote:

Originally posted by hvactech:
I tried hooking it to the R post but there didn't seem to be enough room for the wire with the jumper already there.

It will go. Turn head slightly toward your weak eye, squint dominate eye just so slightly.
Don't over tighten, striped screw is possible. [/QUOTE]

Ok-thanks for the help. I'll have to try it in the morning because if I shut down the power now I'll be in the pitch dark.

I'll let you know how I make out. Tomorrow's forecast calling for highs in the 90's again so I've got to get this fixed.

The blue wire is usually common. If you have it, look in furnace and see if it's connected to C terminal, if it is you can run t-stat without batteries. As hvactech said (I'd trust him more than me) The Red should be the 24v power, not common and goes to R/RC. If the blue isn't connected in furnace then you can connect it and use it as your common.

If you can't figure it out by tomorrow, then just take the R, Y, and G and wire nut them together. This is doing the same function as the t-stat calling for cool and fan. It will run continuously so only run it like that while home or you may come home to an ice box.

12GA glad to see you take caution with power. Turning off the furnace switch is all you need to do.
Skins2881, you are correct with the Blue wire as possible common. I tend to hesitate instructing such without more detail.