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Is the furnace doing anything at all when turned to heat? Is the blower running?
the blower works but no heat comes out just cool air and it only works with the fan in the "on" position on the thermostat but not in "auto". but no matter what there's no heat. the air conditioner blows cold.just cant get any heat out of it.
the cold air works perfect
I need you to take the cover off the thermostat and find where the wires hook in. Take the wire under the W terminal and place it under the R terminal with the wire already there. If the installer didn't do anything weird with his wire colors then the wire under W should be white and the wire under R should be red. Tell me if the heat starts up when this is done.
Can you check the jumper pins on the top right corner beside where the wires hook in and tell me if number 3 pins have the jumper in place or not?
There should be a jumper pin connected here. If there isn't and the red wire is hooked to RC then the heat will not work. If you switched the red wire to RH then only the heat would work and not the cooling. With the jumper in place on number 3 pins then RC and RH will both power at the same time.