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Try all fan speed settings to determine if you have air flow on any (particularly High speed). I don't know the specifics of your Echo, but typically high speed is a straight-through connection for power to the blower motor.
If high speed works but none of the slower speeds do, the issue is very likely the blower motor resistor or the resistor connector.
If none of the speeds work, there might be a bad fuse for the blower motor or the motor itself might be bad.
If you can hear the blower on all speeds but still no air is coming out the vents, the issue might be either a damaged diverter door that is not properly directing air flow or possibly something got sucked in to the blower motor squirrel cage and is severely restricting air flow.
-Rod
If what you mean is that the air comes out the defrost rather than the vents, this may be a vacuum leak, bad vacuum check valve, or bad blend door actuator.
Do you have heat? Does the fan turn on? are you getting air from the defroster vents close to the windshield? If you have heat make sure the defrost control is working. I'd open the outside air vent and turn the blower on high speed. If there is no heat, the heater control valve is not working. Double check the radiator fluid tank, make sure you have enough fluid (antifreeze) Low fluid levels can reduce the hot water flow to the heater coil inside the car. If there
is no air flow through the defroster vents you may have a problem with the fan control, or the fan motor. Good luck.
you may have had something fall down into the defrost vent and it has worked its way down and is blocking the air flow thats trying to come out the vents,near the blower motor.also does it sound like the blower motor is spinning on high speed or at a lower speed,you could have a slow turning blower motor.
Any HELP would be greatly appreciated Thank You
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