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Hello and welcome to JustAnswer! Ill be happy to assist you today. Let's start by restarting the thermostat. Can you remove the face of the thermostat and remove the batteries. Leave them out for 1 minute then reinstall.
After you put the face back on turn back to cool and turn the temperature down so that it is calling for cool. The 'wait' may come on again, but should go off after 5 minutes and system should start cooling. If not, let me know.
Okay, so you have the newer model with no batteries. That's good - Is the display blank when you take it off the wall?
No, leave it installed - so even when 'wait' goes off the system still won't come on? Nothing happens at all inside or outside?
Okay sorry - I thought you meant that 'wait' wouldn't go off. Let's determine if the problem is the thermostat or elsewhere. We know the thermostat is getting power since it lights up, so that's good. If you remove the face of the thermostat again you should see the low voltage wires connected to terminals. If you feel comfortable, you can take a short piece of wire (or a paperclip) and touch one side on RC and the other side to Y. This is low voltage so won't hurt you. When you "jump" RC to Y the system should come on. If it doesn't then the problem is something other than the thermostat.
No, it should've kicked on immediately - Is the indoor unit accessible?
Okay, look around the unit and see if you see any water in a pan or on the floor anywhere. It's possible you have a float switch keeping the unit from coming on.
Hmm - What type of heat do you have? Gas or electric?
Okay, is there a small peep hole in the lower panel of the furnace? If so, look in and see if there's an LED flashing. If so, see if it's flashing a code or just flashing continuously. Do you feel comfortable opening the panels on the furnace?
That sounds like refrigerant is coming through the lines - are you sure the outdoor unit isn't running?
Okay, but the blower in the gas furnace isn't running? If not, go ahead and remove the panels on the furnace if you feel comfortable. There's a door switch that should cut power to the unit/thermostat so the outdoor unit should shut off. Let me know when you get there.
Okay, do you see the blower wheel? If so, reach in and spin it by hand - does it spin freely? Or is it hard to turn or shaky when it's turning?
Oh, okay - The blower is behind the next panel, which is behind the control board. You see the Honeywell filter cabinet? Remove the filter and you should be able to reach through there to spin the blower wheel.
Not sure which side the motor itself is on, but can you reach it? If so, is it really hot or cool to the touch?
Okay, signs are pointing to a bad blower relay. How comfortable are you with playing electrician?
Perfect - would you mind if we pick this back up in an hour? If that's okay, can you take a good closeup picture of the control board and post it?
Okay, I'm back - look closely at the top terminals on the board that has a wire going to it (likely a black wire) that's marked 'Cool' (the word 'cool' will be printed on the actual circuit board next to the terminal). Let me know if you see this.