Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
6/11/2017 1:05:01 PM EDT
Why would putting on a new thermostat make the AC not blow as hard?
6/11/2017 1:11:15 PM EDT
[#1]
Did it the thermostat have a diamond on it?  I gave my ex wife a diamond, and she quit blowing altogether.



On a serious note, it may not be calibrated properly.  Place a couple thermometers around the house and see if they agree with what your thermostat says.
6/11/2017 1:16:47 PM EDT
[#2]
Do you have a dual speed fan?
6/11/2017 1:23:56 PM EDT
[#3]
Quote History
Quoted:
Do you have a dual speed fan?
View Quote
No
6/11/2017 1:24:22 PM EDT
[#4]
The only way it would do that is if you wired it incorrectly and the fan [blower] was running on the heat speed which is usually low or medium low. Do you have several different spare wires at the T stat?
6/11/2017 1:24:51 PM EDT
[#5]
Quote History
Quoted:

No
View Quote
How old is the furnace?
6/11/2017 1:25:39 PM EDT
[#6]
First post joke 
6/11/2017 1:28:20 PM EDT
[#7]
Please explain "not blowing as hard" as this statement is subjective.

Is the air coming out of the registers not as forceful?

Is the temperature of the supply air not as cold?

What thermostat did you have? What thermostat did you replace it with?

What model furnace and condenser do you have?
6/11/2017 1:38:21 PM EDT
[#8]
Quote History
Quoted:
The only way it would do that is if you wired it incorrectly and the fan [blower] was running on the heat speed which is usually low or medium low. Do you have several different spare wires at the T stat?
View Quote
So a little context. I replace thermostats for work. We do home automation. Working in GA and AL area.

I don't usually have extra wires.

90% heat pumps
6/11/2017 1:38:44 PM EDT
[#9]
Quote History
Quoted:


How old is the furnace?
View Quote
Newer furnaces
6/11/2017 1:40:34 PM EDT
[#10]
Quote History
Quoted:
Please explain "not blowing as hard" as this statement is subjective.

Is the air coming out of the registers not as forceful?

Is the temperature of the supply air not as cold?

What thermostat did you have? What thermostat did you replace it with?

What model furnace and condenser do you have?
View Quote
Correct. Not as forceful. Sometimes the air doesn't seem as cold.

Sometimes I'll put their old thermostat back on to see if it goes back and it does not.
6/11/2017 1:45:50 PM EDT
[#11]
One time I wired a thermostat up backwards and cool air was coming from the outside unit.  Was pretty freaky.
6/11/2017 1:59:55 PM EDT
[#12]
Quote History
Quoted:
One time I wired a thermostat up backwards and cool air was coming from the outside unit.  Was pretty freaky.
View Quote
Wat?

Honestly, I think it's all your imagination.

Replace the filter if you think sn A/C blower unit isn't blowing normally, past that, the first place I'd check is the blower motor capacitor. One that is failing but still able to get the motor moving can still have a significant decrease in motor speed. +-6% of rating.
6/11/2017 2:12:10 PM EDT
[#13]
Quote History
Quoted:
One time I wired a thermostat up backwards and cool air was coming from the outside unit.  Was pretty freaky.
View Quote
That's called heat pump mode:

Sucks in btu's outside, spits them out inside. Refrigerant runs backwards.


Cooling mode:
sucks in BTU's inside coil, spits them outside



Just use reversing valve to flip objects in the refrigeration process.
6/11/2017 2:34:36 PM EDT
[#14]
Quote History
Quoted:
One time I wired a thermostat up backwards and cool air was coming from the outside unit.  Was pretty freaky.
View Quote
lol
6/11/2017 3:33:43 PM EDT
[#15]
What is the model of the indoor unit? 
6/11/2017 4:41:59 PM EDT
[#16]
Quote History
Quoted:

Correct. Not as forceful. Sometimes the air doesn't seem as cold.

Sometimes I'll put their old thermostat back on to see if it goes back and it does not.
View Quote
My advice to you is to look over all the simple homeowner stuff like filters, coils, and breakers. If you can't find anything wrong with these things, have your system cleaned and inspected by a pro.