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View Full Version : My furnace blow hot air and after a while it blows it out cold.

fcastro
Nov 30, 2008, 04:01 PM
My furnace blows hot air and after a while it blows it out cold. What could be the problem?
hvac1000
Nov 30, 2008, 06:29 PM
Can you narrow the problem down. The problem could be one of 100 different things as it is stated now.