Gas or Propane furnaces contain heat exchangers that produce heat when the gas or propane is burned or combusted. The combusted or by products of the fuel being utilized in the furnace produces fumes that should be vented to the outdoors. As the heat exchangers wear...
What can cause a indoor furnace or air handler to make abnormal noises? Here is an actual list of obstacles or issues I have found inside systems, blower compartments and duct work: Dead mouse stuck in a blower wheel! Blower Wheel is actually coming apart at the frame...