Single stage thermostat / 2-stage air handler

Posted by KJPRO on April 22, 2008, 1:07 am

> Yes, tell him Bubba.

It doesn't matter who tells me. Kool, do you know why the warm air is
blowing when the A/C is turned on?
Bryan

My crystal ball says... you need a complete NEW system!

Posted by Bubba on April 21, 2008, 9:33 pm

wrote:

>>I know I should be using a 2-stage thermostat. This is only temporary.
>> I have a Honeywell Round thermostat (CT87B) hooked up to our new
>> American Standard air handler (2TEC). The problem is when I turn the A/
>> C on, warm air is coming out of vents. Here's how the thermostat is
>> wired:
>> brown/yellow (jumpered).........Y
>> white/orange (jumpered)........W
>> green...................................G
>> red...................................RC / RH (jumpered)
>> I know it's not going to be as efficient as using a 2-stage
>> thermostat, I just need to be able to use it this way until Friday.
>> Any ideas on what's wrong?
>> Bryan

>Yes, tell him Bubba.

You have too many wires jumpered.
You need a C terminal.
You should jumper the C terminal to the RC/RH.
Do this slowly. If you do it too fast, you will let out the factory
smoke.
Bubba

Posted by over a barrel on April 21, 2008, 11:42 pm

> I know I should be using a 2-stage thermostat. This is only temporary.
> I have a Honeywell Round thermostat (CT87B) hooked up to our new
> American Standard air handler (2TEC). The problem is when I turn the A/
> C on, warm air is coming out of vents. Here's how the thermostat is
> wired:
> brown/yellow (jumpered).........Y
> white/orange (jumpered)........W
> green...................................G
> red...................................RC / RH (jumpered)
> I know it's not going to be as efficient as using a 2-stage
> thermostat, I just need to be able to use it this way until Friday.
> Any ideas on what's wrong?
> Bryan

Yes.

--

Posted by on April 22, 2008, 9:08 am

On Mon, 21 Apr 2008 13:58:46 -0700 (PDT), Totalrod2@aol.com wrote:

>Any ideas on what's wrong?
>Bryan

Yep, you don't have a clue, that's what's going on.

Posted by Bob Shuman on April 22, 2008, 11:26 am

Suggest you re-post your question in sci.electronics.repair. That group is
usually pretty helpful.

Bob

>I know I should be using a 2-stage thermostat. This is only temporary.
> I have a Honeywell Round thermostat (CT87B) hooked up to our new
> American Standard air handler (2TEC). The problem is when I turn the A/
> C on, warm air is coming out of vents. Here's how the thermostat is
> wired:
> brown/yellow (jumpered).........Y
> white/orange (jumpered)........W
> green...................................G
> red...................................RC / RH (jumpered)
> I know it's not going to be as efficient as using a 2-stage
> thermostat, I just need to be able to use it this way until Friday.
> Any ideas on what's wrong?
> Bryan

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Single stage thermostat / 2-stage air handler - Page 2