Had a new Payne 80% efficiency furnace installed 5 days ago Worked fine for 3 hours. House dropped 7 degrees below set temp. Finally at 10:30 kicked on blew cold for 30 seconds, shut off, came on 1.5 minutes later and blew warm for about 4 minutes, then blew cold for about 5 then shut off. Did not run long enough to bring temp up to where it should be. Service came out next day, reset furnace, checked thermostat, put cheaper thin filter in, opened up all our vents ran for 3 cycles ok and then back to the same problem. Now it comes on willy nilly but only for the 30 sec, 4 minute, 5 minute thing so house never warms up. He is supposed to be back today but needless to say this is getting old and cold real fast.
