I have replaced my thermostat and managed not to burn down my house and only blow a few fuses.. Kidding, but really I do not know about them just what I have read here and around the internet. I have managed to get the power going to the right places and the AC works fine. When I turn on the heat it blows cool air instead of heat. I think it has to do with the jumper setting.
Please let me know what you think
I have AC and gas heat
Please let me know what other info would be needed to get a answer.
I thought I had a jumper on it but when I look now there is none.

I will attempt to upload a pic later. It is a Honeywell thermostat with a digital display

RC -> Red wire
R -> Blank
W -> Light Blue
Y -> Yellow
G -> Green
C -> Blue

And
S1 -> Blank
S2 -> Blank

Jumper R to RC.

Let me say thank you in advance for your assistance! I did try jumping them and now when I adjust the thermostat to 80 (current temp showing 75) and it is set to heat only. The AC unit which is on the side of the house turns on and the air that is blowing out is cool. Not quite cold like it is when the AC is running. Is it possible both are running at the same time?

I uploaded images of the thermostat as well as the wire panel


Picasa Web Albums - Jeff - thermostat (http://picasaweb.google.com/jgb.spk/Thermostat#)

Picasa Web Albums - Jeff - thermostat (http://picasaweb.google.com/jgb.spk/Thermostat#5273466301839219538)

Picasa Web Albums - Jeff - thermostat (http://picasaweb.google.com/jgb.spk/Thermostat#5273466313230505330)

http://picasaweb.google.com/jgb.spk/Thermostat#5273466313230505330

What colored wires are connected at what terminals on the furnace board? Have the thermostat wire been spliced between furnace and thermostat? Simple test... unhook all thermostat wires from furnace(remember where they go, so you can hook them back up) Once all thermostat wires are disconnected from furnace, then jump r and w on furnace board with a piece of wire. Let me know if this makes your heat work.

I will crawl up and take a look later tonight. I did notice one thing also since I jumpered the wires together when I turn the AC on the heater turns on and will not turn off until I remove the thermostat from the wall.

SO I crawled up there and did not want to cross any wires since I was not sure what you meant by touch the R and W. I have nothing connected to the R on the thermostat.
In the attic I see several sets of wires, none of them look like the ones connected to the thermostat.(maybe I missed them?
On the one set of wires that are connected to circuit board via bolt down connector they are connected like so:
Y1 -> blank
DHUM -> blank
G -> green/yellow (1 wire)
COM24V->white/blue (2wires)
W -> white/lightBlue
Y/Y2 -> yellow (2wires)
R -> red


I also uploaded some poor pics as well:
They are in this album
Picasa Web Albums - Jeff - thermostat (http://picasaweb.google.com/jgb.spk/Thermostat#)

So I stopped being so lazy and went and found the manual for the thermostat VisionPRO Honeywell and realized that it was set for electric heat ad not gas. I think I got it set right with these settings:
170-1
180-0
220-3
240-3
280-1
Manual was here:
http://customer.honeywell.com/techlit/pdf/69-0000s/69-1871.pdf
Does this look good?
Thanks so much for getting me started and confirmation~!
Jeff

I spoke too soon it is not heating even though I have it set to 90 and room temp is 79

[QUOTE=jeffbasu;1404106] I have nothing connected to the R on the thermostat

Should have a red wire connected to the r terminal at thermostat, same wire should connect to r terminal at furnace. The r terminal is the heat terminal. If no wire connected to r at thermostat, you will not get heat.

[QUOTE=jeffbasu;1404106] I have nothing connected to the R on the thermostat

should have a red wire connected to the r terminal at thermostat, same wire should connect to r terminal at furnace. The r terminal is the heat terminal. If no wire connected to r at thermostat, you will not get heat.

I located them they are connected to the same terminals on the furnace board. The only difference is the yellow is connected to a lead that is marked y/y2 on the furnace board side

The heater I have is a Comfort 80 Gas Furnace - Carrier thermostat is TH8110U now just need to know the settings for it

the heater I have is a Comfort 80 Gas Furnace - Carrier thermostat is TH8110U now just need to know the settings for it

Well looks like I have a 2 stage heater and the thermostat is can only be used with a single stage. Can I just plug it in as a 1 stage? Not too worried about cost saving since heat will only be used for maybe 1 or 2 months a year since I live in AZ. I actually haven’t had the heat on at all so far!
:)

Finally problem solved the problem - wiring was correct the jumper was supposed to be there (makes seemingly obvious sense since both need power but I am not an EE).

The problem was a stupid setting on the thermostat- 0300 option which allows for this option on the thermostat when in use:
0 -> Manual changeover (Heat/Cool/Off)
1 -> Automatic changeover (Heat/Cool/Auto/Off)

I had it set to 1 and changed it to 0. The 1 setting allows you to use a "auto" feature which allows you to use the AC and heat - so if it gets cold at night and hot in day the program will turn each on accordingly (yeah not real efficient) so I turned that option off and voilà it works fine now!
Still would like to know why having this enabled caused the heat to turn on when the AC was selected? It looks like a strait forward feature?
So if Google can pick up this string then maybe it can help some more people.

Most AUTO's are auto fan. Some AUTO's are auto changeover (allow both heat and cool) and still other AUTO's lock out heat or cool based on a changeover pipe sensor. Most are familiar with AUTO's that you drive.

You would appriciate AUTO-changeover if you were in an auditorium or church where initially it's cold and then it gets hot. Really hot. The AC needs to come on.

I know I had troubles with what trigger "Normal" is on an oscilloscope.

You forgot to mention the worst auto of all... "auto-erotic asphixiation"...

You forgot to mention the worst auto of all..."auto-erotic asphixiation"...
Different strokes my friend... different strokes. :D