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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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My AC is blowing cold air but it's not cooling the house,

Customer Question

My AC is blowing cold air but it's not cooling the house
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: the thermostat is set at 60 and it's 85 in here, and the filter was just changed yesterday
JA: Do you plan on doing the work yourself?
Customer: if I can
JA: Anything else we should know to help you best?
Customer: the AC unit was just replaced and I just had my vents deep cleaned
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

1. Feel of large copper line at outdoor and tell me if it is cool, cold or atmospheric temp

Customer: replied 1 year ago.
maybe slightly cooler than my hand
Expert:  airheatman replied 1 year ago.

Should be "beer can cold". If not if compressor is running you are most likely low on refrigerant. Do you have a thermometer to check air temp going into unit inside and air temp coming out of vents?

Customer: replied 1 year ago.
No I don't have one, the air outside is 90 and the air it's blowing is cool air but it's not blowing very hard through the downstairs vents and hardly blowing at all upstairs
Expert:  airheatman replied 1 year ago.

Any signs of ice on the indoor coil? If the indoor is electric look from underneath

Customer: replied 1 year ago.
no signs of ice
Expert:  airheatman replied 1 year ago.

Did you have both indoor and outdoor replaced?

Customer: replied 1 year ago.
Expert:  airheatman replied 1 year ago.

You may have more than one thing going on here.First of all, if refrigerant charge is correct the suction line should be cold and sweating, not just slightly cool.

Refrigerant however should not effect your air flow if the coil is not icing.

If you had this installed by a contractor, I would get on phone and get them back out there.

Customer: replied 1 year ago.
I would except he's out of state until tomorrow, I just thought I'd jump on here and see if I could get an answer because it's so hot in here
Expert:  airheatman replied 1 year ago.

I understand. You don't by any chance have refrigerant gauges do you?

Customer: replied 1 year ago.
I wouldn't know where it is, my indoor unit is in the basement
Expert:  airheatman replied 1 year ago.

I meant gauges to connect to unit to see what our operating pressures are.They are the first step in troubleshooting as once they are connected they tell us a lot of things about what may be the culprit.

Customer: replied 1 year ago.
I don't :(
Expert:  airheatman replied 1 year ago.

It appears you may have more than one issue.One being why our airflow is not good and one being why refrigerant line is not cold.

There is no duct loose or anything that might be effecting air flow is there?

Customer: replied 1 year ago.
Not that I know of I did just have the vents professionally deep cleaned, is there some easy way to know if a duct is loose?
Expert:  airheatman replied 1 year ago.

You can do a visual by looking to make sure duct cleaning people did not break any ductwork loose or leave anything disconnected.

Customer: replied 1 year ago.
Where exactly would I look? Don't they run through the entire house?
Expert:  airheatman replied 1 year ago.

Usually in attic or basement .Concentrate especially on the areas where the accessed to clean.