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There is no air coming out of floor vents when the AC is on. Motor fan is running, I have replaced limit switch and fan switch, plus thermostat.

Hi,


Double or single wide ?



NO air at all out of ANY register ?



Thanks,
Robert

Robert wrote:Hi,


Double or single wide ?



NO air at all out of ANY register ?



Thanks,
Robert

It will blow cold air for a short time and then stops, but the blower is still running.

Double wide

The air keeps flowing, just not cold anymore or the air flow stops all together.


Thanks,
Robert

Robert wrote:The air keeps flowing, just not cold anymore or the air flow stops all together.


Thanks,
Robert

Air flow stops all together, btw thanks for the help

Hi,


When the airflow stops, does it stop completely flowing from every register in both halves of the home ?


Have you removed door panel and visually seen that blower motor was still running and blower wheel turning ?


There is a smaller motor that runs also (draft inducer motor).



IF the blower motor and wheel are turning/running full speed, but you have zero airflow from any registers, there is a blockage or a duct loose somewhere.


IF it is just on the side opposite the furnace, then most likely a crossover duct blocked, loose or torn.


Thanks,
Robert