Hello. My furnace is blowing cold but still works.? Hi we recently purchased a house. Its gotten really cold these ultimate...

Hi we recently purchased a house. Its gotten really cold these ultimate couple weeks. The thermostat we have jacked up to 80 degree to keep the house at 65 degree.. It blows nothing but cold nouns.. however theres a smaller pipe presume the exhuast? anyways its hotter then hell. Im trying to digit out what I can do. as i dont have the money to sport an HVAC tech atm. my relations is cold. Please help =)
Answers:    Sounds close to there are some crossed wires on the motor, making the devotee run backwards.