New motor put in coleman furnance model # EB15C blows cool air and runs at fast speed but barley blows air out vents
Furnace stopped running motor locked up on the hottest day of summer. new motor and compositor changed. blower wheel spinning fast, motor running. cold air coming from vent but blowing very weak. little to no air flow.
Heating & Cooling - Coleman
Answers & Comments
Check your filter. If dirty lack of air with no return. You may also want to check if your coil over the furnace is clogged. Also, check the rotation of the blower motor you put in. Put paper up to return and see if it pulls it inward. If it is not pulling in on return then your rotation on the motor is reversed.
Does your return hold a piece of toilet paper? Fan possibly rotating backwards.
If the shaft from the motor is not securely connected to the fan, although it is turning, it may be slipping. Check that the set screws are tight between the motor shaft and the squirrel cage fan.
Otherwise, it sounds like you have duct problem. A rodent may have chewed a hole in the duct, or the connection between the and the delivery duct, or the connection between the delivery duct and the floor or wall grate has become disconnect. (This last is common, a screw holding the duct to the floor grate has come loose or the duct tape has come loose from gravity pull down on the duct to grate connection. If you have a basement or crawl space you have have to inspect that the duct work has not come apart.