I have a York central air conditioning system that is not working upstairs. The heat worked over the winter, the fan goes on and all but its still 85 degrees. No cool air coming out, just warm air. The system is only a year old. I know the heating people were here over the winter because one side of the upstairs was getting warmer than the other and they did something to make the heat flow better into the kids rooms. I cant help but think the guys may have done something to warrant another house call when it got hotter. Is there a switch or something that is easy to recognize that may have been tripped so I am not getting cool air, just warm?
I know, pretty lame but I am clueless with this kind of crap.
Also if the batteries in the thermostat are old will that effect anything?