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Question

My air handling unit for my ac unit turns on but the fan blower doesn't appear to be blowing any air.

Submitted: 65 days and 17 hours ago.

Category: HVAC

Value: $15

Status: CLOSED

Posted by Billy 65 days and 17 hours ago.

Info Request

Is the blower running but no air coming out? Or is the blower not running?

65 days and 17 hours ago.

Reply

I can hear the air handling unit on but no air is coming throught the vents

Posted by Billy 65 days and 17 hours ago.

Answer

Ok, the indoor coil is frozen. Turn cooling to off and fan switch to on. Wait 45 minutes. You will gradually start getting airflow through the vents, but wait the 45 minutes for full thaw. While waiting check the air filter since a plugged filter is the number one cause for freeze up. If it freezes again let me know and we can go over the other possibilities. I will leave this question open in case you require follow up

65 days and 17 hours ago.

Reply

While I am waiting to see if this works what would cause the problem

Accepted Answer

3 things freeze a coil. Restricted air flow due to filter, plugged indoor coil or weak blower. The second is being low on refrigerant. Third is being set too low.

Edited by Billy on 9/18/2009 at 3:14 PM

Accepts:
Expert:	Billy
Pos. Feedback:	99.7 %
Answered:	9/18/2009

HVAC Mechanic

State Licensed Mechanical Contractor, Heating, Cooling, Oil Burners, Heat Pumps, Boilers, Geothermal

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Question

My air handling unit for my ac unit turns on but the fan blower doesn't appear to be blowing any air.

Info Request

Is the blower running but no air coming out? Or is the blower not running?

Reply

I can hear the air handling unit on but no air is coming throught the vents

Answer

Reply

While I am waiting to see if this works what would cause the problem

Accepted Answer

3 things freeze a coil. Restricted air flow due to filter, plugged indoor coil or weak blower. The second is being low on refrigerant. Third is being set too low.Edited by Billy on 9/18/2009 at 3:14 PM

Related HVAC Questions

3 things freeze a coil. Restricted air flow due to filter, plugged indoor coil or weak blower. The second is being low on refrigerant. Third is being set too low.

Edited by Billy on 9/18/2009 at 3:14 PM