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Need WiFi thermostat guru #8127581 01/13/21 02:24 PM
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Cast Offline OP
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My inside air handler is ‘95 vintage, my outside compressor is only a few years old. Everything works well.

The air handler has no ‘control panel’ as mentioned in WiFi thermostat install instructions, but it does have a control transformer of course.

I am trying to install a new Wyse WiFi thermostat, and after a week of flailing, I’m done.

I need/want a pro that can come to Rhome and do my install in his/her sleep.

Seriously, if my buddy Mike and I couldn’t figure it out, neither will you if you haven’t done this before.

No offense meant guys, I’m just reaching the end of my rope. I really want to smash this new thermostat against the wall.


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Re: Need WiFi thermostat guru [Re: Cast] #8127605 01/13/21 02:36 PM
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I really was about post a "Where is Cast" thread.


If the 2nd amendment was written just to include guns for hunting, why is there not an amendment to protect fishing poles?
Re: Need WiFi thermostat guru [Re: Cast] #8127606 01/13/21 02:38 PM
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He’s been cussing a WiFi thermostat.


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Re: Need WiFi thermostat guru [Re: Cast] #8127609 01/13/21 02:41 PM
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I installed some Honeywell wifi thermostats in my house and followed the directions to a tee. When wired up the damn heater came on and almost ran us all out of the house.

I called them and they patched me through to some expert. I gave him my whole set up and he gave me wiring directions that were completely different than what was in the manual. All worked, and has been working, perfectly.

Might be worth a call if you haven't made one yet.


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Re: Need WiFi thermostat guru [Re: Cast] #8127613 01/13/21 02:44 PM
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Mike spent time on the phone and sent them pics.


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Re: Need WiFi thermostat guru [Re: Cast] #8127631 01/13/21 03:02 PM
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Originally Posted by Cast
He’s been cussing a WiFi thermostat.


Assume you deleted my last msg.


If the 2nd amendment was written just to include guns for hunting, why is there not an amendment to protect fishing poles?
Re: Need WiFi thermostat guru [Re: Cast] #8127775 01/13/21 05:02 PM
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did you take pics/notes of the OLD thermostat before removing? (and still have OLD stat)?
that info, together with the WYSE T-stat model # , I can probably figure out remotely.

Re: Need WiFi thermostat guru [Re: Cast] #8127804 01/13/21 05:18 PM
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after looking online, if your system (old thermostat) used 5 wires, and the new wise is only 4 wire, you may need Wyse's 'C-wire adapter' module.

My system uses 16 wires! eek2 (multi-stage duel fuel heatpump/gas with humidity control & 2nd temp sensor)

Re: Need WiFi thermostat guru [Re: Cast] #8127885 01/13/21 06:21 PM
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The old tstat is still online. It’s just falling apart on me. I’ll get some pics.

[Linked Image]

[Linked Image]

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Re: Need WiFi thermostat guru [Re: Cast] #8127943 01/13/21 06:57 PM
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looking at that - looks like old thermostat is a simple 4-wire MECHANICAL. Note that yours uses a BLUE wire for the Y (yellow)
you shouldn't have to touch anything in the blower**

New stat should easily wire right in, using the BLUE wire for Y, and other three wires color coded correctly.

** If the new stat can't grab it's power from the 4-wires, you may have to run a 5th wire (which acts like a ground, but not really a ground cause its 24vAC- the RED wire is like the 'hot')
this 5th/new wire would go to the C terminal on the new stat, and prolly have to run back to your blower (if that is where the 24vAC transformer is) to the other transformer 24vAC line.

Re: Need WiFi thermostat guru [Re: Cast] #8128002 01/13/21 07:33 PM
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I’m sure that’s it exactly, but right now I’m in no shape to do any of that. Looking for someone to pull the wire and hook it all up for me.


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Re: Need WiFi thermostat guru [Re: Cast] #8128015 01/13/21 07:43 PM
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Ok, going back looking at specs for the Wyse I found this:
[Linked Image]

notice where I circled in yellow:
your old thermostat was mechanical, and didn't need power for itself, so there was no C (common) wire from 24vAC transformer to it.


Since the Wyze has electronics, it needs access to power (24vAC). The RED wire is one side of 24vAC, but you need the other side, the C (common)

your 4 wires:
Red-=hot 24vAC
Green=fan relay
White=heat relay
Yellow= AC compressor relay (BLUE wire for you)

so your 'missing' a 5th wire, C = common (~ground~) , to power the Wyze

looks like Wyze sells (or includes??) a 'C-wire-adapter' to push power thru 4 wires, but only if you have common at the blower (24vAC transformer inside blower)

Really old systems put the 24vAC transformer outside in the condenser - if so, you'll need to run the common from there if that is the case.

Bolded above is the issue; hope this helps.

Re: Need WiFi thermostat guru [Re: Cast] #8128061 01/13/21 08:38 PM
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I checked with a local HVAC shop. They charge $49 to install thermostats, including pulling in a C wire.

He is on the way.


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Re: Need WiFi thermostat guru [Re: Cast] #8128895 01/14/21 01:41 PM
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It took the HVAC guy a long time and he had plenty of troubles making it happen, but he stuck with it.

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Cast

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Re: Need WiFi thermostat guru [Re: Cast] #8128921 01/14/21 02:04 PM
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Re: Need WiFi thermostat guru [Re: Cast] #8128928 01/14/21 02:10 PM
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Yep. Didn't hurt anything but your pocketbook. I sleep a lot cooler than 76°.


Quail hunting is like walking into, and out of a beautiful painting all day long. Gene Hill


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Re: Need WiFi thermostat guru [Re: Cast] #8128987 01/14/21 03:06 PM
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Dang 76!


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Re: Need WiFi thermostat guru [Re: Cast] #8129082 01/14/21 04:27 PM
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Woke up cold. Getting the house warmed up. Plus there’s a constant flow of folks through the front door these days.


Cast

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