We have a Bryant Evolution system. Its only about a year and a half old. Was installed by the homebuilder. About 2 days ago it I noticed the reading on it said "cooling at 42" and we can not manually change the temp. to cool back up to 73 degrees. The up button for the temp. will not work to move the temp back up. We managed to go into vacation mode and set that and it read cooling at 72 but then during the next day while on vacation mode still the "cooling at" read 42 degrees again. Were wondering if button could be broke somehow or if it could be some panel problem or if this has happened to anyone else. Any help on warranty into on therm would help. Says five years. Thanks! Jeanne

OK, I had a similar issue with an Infinity stat. I could not reset the filter usage percentage. It would dismiss, but never reset to zero. Very odd.

While it was in the reset screen, I turned power off for the furnace and turned it on 10 min later. It worked the next time.

Make sure the temperatures are right in the programmed mode of operation.