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The ac system is Carrier...The wires are color codes, as you know. The connections are marked by the letter of the color. There is a jumper at the R .
electric system..the jumper is placed in r/rc
OK did you set the little jumper on back of thermostat to HE? It comes form factory set at HG and must be changed This is not where your controls wirs are connected.It is a seperate jumper.Plastic that clips on prongs
It is set to electric...I moved it from the factory setting.
I checked the 3 amp fuse on the unit to see if it was blown..it wasn't but I replaced it anyway..Again, the heat will come on....just can't seem to get the ac to come on
I turned the power off at the breaker before I began anything.
I touched the red to yellow and the outdoor unit started....so what does that mean?
OKAY: R to G works..blower comes on...R to W works and heat comes on...R to Y works as outdoor unit comes on..Do you think I need to remove the jumper from R/RC?
and where would the transformer be located?
Hello there! I'm Norman but you can call me Norm. I'm sorry the other experts have stepped away.
Let me see what I might can do to help.
First so I understand the exact setup you have tell me what color wires you have going to which terminals on the thermostat. LIke Orange to O/B, White to AUX, etc.
From what I read you seem to have voltage as required and it sounds like the system is operating when jumped. My thoughts are it is a simple, but very common, thermostat setup issue.
I'll be standing by for your reply.
Okay....maybe it's not fixed
I'm here to help if you still need it.
I'd also like to know with your system did the outdoor unit run when you would heat the home before and cool the home or did the outdoor only run for A/C mode and rely on the indoor furnace for heating?
Okay....The wires are: Left to right...brown...not connected: green, yellow, white, red into the rc slot...and jumper from r/rc removed.
When I tried the r+g wire, the blower came on...r+w wire, the heat came on...r+yellow, the outdoor unit came on.
okay..putting that back in place now
ac is electric : heat is on the same unit...the only gas is the water heater
So the outdoor unit never runs when the system used to heat?
Yes...it does...I can get the heat to come on, but not the ac since I changed out the thermostat
I need to understand more about your system.
Does your system have two components, an indoor air handler and an outdoor condensing unit or is this an all in one unit (packaged) with the only equipment outdoors?
I live in a condo....there is a component outside and an indoor component, air handler.
That's what I was thinking but when you tell me you used the RTH230B thermostat before that's where I'm getting thrown off. This thermostat as well as the RTH230B are both for conventional heating/cooling systems. If your outdoor unit is supposed to run in both heating and cooling that would mean you have a heat pump and neither the old RTH230B nor this thermostat are made for a heat pump application.
With a heat pump the outdoor unit runs for both heating and cooling and it changes state based on 24v applied via the reversing valve wire O/B.
With the RTH230B Did it work for both heating and cooling and operate just fine in both modes? Also, did you ever have an orange wire that was being used?
The 230 worked for both...the orange wire was taped off.
carrier model 38cks split a/c system
Ok, that model number is XXXXX A/C unit only. That tells me a lot.
So with all 4 wires connected and a jumper from RC to R what happens when you try to use the thermostat to run the system? This knowing that jumping the wires together allows the system to function as it should.
There are 5 wires connected. Are you saying that the orange one shouldn't be?Orange, green, yellow, white and red are connected. The brown wire is taped off, not connected....
Red should be to Rh with a jumper to Rc
White should be to W
Green to G
Yellow to Y
The rest capped off.
Now what happens when you try to use the thermostat. Please consider there may be a time delay between when you turn it on and when the system starts and also between heating/cooling modes.
Could take as long as 5 minutes.
While I am waiting, let me take the opportunity to thank you for your help. I am technologically savvy in my job, but when it comes to homeowner stuff, I am sadly lacking, but willing to learn.
If it doesn't happen to work, what thermostat do you recommend that I can go get on a Sunday?
There's nothing wrong with this model thermostat. If the jumping you did works but the thermostat doesn't then the problem is clearly the thermostat.
Any Honeywell would be fine. We use a lot of Focus Pro's which seem to work great. Be sure to go with the programmable again.
Okay...I think it has been 5 minutes and it has not kicked on, so I am going to return this and get another....
Yeah. I feel confident with what you've told me that the thermostat is the culprit. Your system is a 1 stage heat / 1 stage cool thermostat so make sure you buy one that works for that application. Most any thermostat will but in Lowes or Home Depot you may find lots of thermostats with bells and whistles so have fun with that.
If you find that you have more questions simply reply. Good working with you!