Ac unit central

Is this a new tstat? How about trying cooling with fan in on position , what happens? What is the model number of your indoor unit please.

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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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its look like blower problem , 1st check blower speed controller, check blower motor , check its ball bearing etc , its does not have any link to external unit .

Have your ac man come and clean your coil on the unit.The smell may be trapped there.

1 posible cause.the thermostat supplies 24 volts to the outside unit to control the contactor if you hear a ligth huming on the outside unit this is the being activated. if this is the case then
check to see if any ants are in or around the unit see video, they will usually climb to dry areas before during or after a storm and for some reason they like the contactor if this is the case cut all power to the unit and clean contactor spray the area around the unit with an insecticide ( not the contactor) replace cover and test unit. Best of Luck.

Hello BWOOD Check the thermostat FAN button is in AUTO position not ON position.That might be it .The relay is in the blower unit but they RARELY become frozen/welded stuck on.

if the ac outside is working, but not the furnace, means there is a control problem with the furnace, check wires in the furnace, make sure there is a blower wire plugged into the contact marked cool on the control panel of the furnace

The thermostat is the controller.

Your blower fan turning on and off shows your thermostat is working. I am willing to bet you have the fan in the automatic condition. Check for a sticking contactor at the outside unit.

Is your unit a Split system where one unit is inside (attic, garage, utility room) and another outside?? Is the outside unit unit running?? Is your thermostat electronic or the regular slide mechanical type??