First time using the AC. Won't go on. Heater works.

AC inside fan doesn't come on AUTO - DoItYourself.com Community Forums

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Jul 21, 2004 - The inside FAN doesn't run when in AUTO mode. If I leave ... Is the thermostat not working correctly or something in the AC unit causing it to do this? Thanx ... The unit is electric central air-conditioning(heat and cool). It made ... Carrier A/C condenser fan not working
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The best information you could get is from Carrier. Here's their website:

http://www.carrier.com/homecomfort/en/us/for-owners/

There is a toll free number to call 1-800-Carrier (1-800-227-7437)

The cooling light not coming on, on the ac unit

Dan is this a new system, or has some work on the system (to include the thermostat) been done recently?

Sounds like the thermostat may be wired wrong. From what you describe, the igniter element is coming on, as though you are calling for heating. Do you allow the ignitor to keep going and see if the gas fires off, or are you seeing this and shutting down the system immediately?

If you had the t-stat changed recently, or this is a new system, contact the installing contractor. It may be under warranty.

Call your local company and check the warranty status on the Infinity UI it should still be under warranty and get a replacement otherwise it could run you a couple hundred dollars

Open the flap, and press and hold the advanced button for 10 sec. you will be in the Installer setup screen. scroll down to the setup subfolder and select thermostat and it will be in there.

A follow-up to my previous post. I talked with a technician from the Co that installed my unit, and the issue lies in the "Utility saver mode" for the 2 stage heat pumps, and having the high stage locked out. In the Advanced Setup menu (hold the "Advanced" button for 10 seconds to access this menu, look for the "Utility Saver" menu item. Select it and your system probably shows that "Utility Saver" is enabled, which only allows your heat pump to run on the low stage and not the high stage. If you change the the setting to be disabled, this will allow your system to run at the high stage and should solve your problem.

I have not changed the settings on my system yet to confirm this solution. That will have to wait until I get home this evening.

Your old stat is wired for a traditional thermostat and not a communication stat like the new infinity you have. There is a module plug on the furnace board that will need to be connected to the new thermostat for it to work. The wires that are wired now are from a terminal strip inside the furnace. Please contact your local Carrier dealer. They may be able to get that harness for you

Contact the company that installed the unit. Its new, under warranty, Anything you do could void the warranty. If they do not take care of the problem without charges contact Carrier and tell them what's going on. The company who installed the unit is responsible for making it run correctly. Good luck. kstfas