No air coming out of vents


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Old 07-06-17, 12:14 PM
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No air coming out of vents

Last night I noticed I was not getting any air out of my AC vents. Googled the problem tried a few things to see if I could identify the problem. First I turned off the unit to let it thaw. This seemed to work after a few hours there was quite a bit of water to clean up. As that continued I turned the thermostat Fan to On. Alas no luck, no air coming out. When I turned the AC on after letting the unit thaw for 12+ hours the outside fan unit blows air and appears to work but no air is coming out of the vents. Is there anything else I can do before calling a pro?
 
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Old 07-06-17, 12:34 PM
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Welcome to the forums!

The HVAC guys will want to know what type of system you have. Do you have an air handler? I'd be looking at the fan motor in the air handler [inside unit]
 
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Old 07-06-17, 01:36 PM
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No airflow will cause the coil to freeze, Pull the blower door off and push the safety switch in. See if the blower is running.
 
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Old 07-06-17, 01:42 PM
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It sounds like you have a problem with the fan (blower) in your furnace/air handler. If you have a furnace, try setting your thermostat to heat and turn the thermostat up to make the furnace turn on. Do you get any airflow then? If you do, then you may have a bad blower motor (many furnaces use a 2-speed motor, one speed for heat, the other for cooling).

If the blower doesn't come on in either heat or cool mode, you may have a bad capacitor (if you have a PSC blower motor). With the power turned off, look to see if you have a capacitor (round or oval metal "can") near the motor (may be attached to outside of squirrel cage).
 
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Old 07-06-17, 02:23 PM
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If you have a furnace, try setting your thermostat to heat and turn the thermostat up to make the furnace turn on. Do you get any airflow then?
I did get airflow after leaving it on for a few minutes.

Pull the blower door off and push the safety switch in. See if the blower is running.
I did that and saw the blower was mumming and moving like it was on. I have air again. I guess the problem was freezing. Thanks for all of your help!
 
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Old 07-06-17, 08:13 PM
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I guess the problem was freezing. Thanks for all of your help!
You need to verify that you have a strong airflow out of the registers. If it is strong then you may be low on refrigerant and require a recharge.

Make sure the filter is clean.
If it froze once..... it will again.
 
 

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