Upstairs vs. Downstairs Cooling Issue

[Mantha81]

I have a 2 story house with one thermostat upstairs and one downstairs. Lived in this house for 3 years, no problems controlling both seperately. Now, when I turn on my downstairs, the upstairs AC blows great and super cold, but my downstairs hardly blows. Help please!

[CoolingWizard]

@Mantha81 ,

Try this, using your downstairs Nest Thermostat, set the system mode to OFF. Then select Fan and turn it on for say 15 minutes. Go to the air handler and see and see if you can hear the blower fan running. If it is not running, you need a service call to determine why it is not.  If it is running, then check the filter make sure it is not clogged up with dirt.  When and AC is starved for air, the I door coil will ice up and when that happens, no air flows over the coil. Also,,if the blower fan is not running the same thing will happen. 

AC Cooling Wizard

[Mantha81]

Hi, thank you so much for the response. The fan is running but nothing is iced over. What do you suggest?

[CoolingWizard]

@Mantha81 , turn the system to COOL, and go outside to the outdoor unit make sure the Compressor and the fan are running.  Reach down to the copper pipes, the smaller is the liquid line and should be very hot, and the larger one on foam, should be pretty cool.  

AC Cooling Wizard 

[zoeuvre]

Hi folks, 

@Mantha81, thanks for reaching out, and I'm sorry to hear about the situation. I want to check if you managed to see the response above. Please let us know if you still have questions or concerns, as we'll be willing to assist you more. 
 

I appreciate your help, @CoolingWizard. 

Best,

Zoe 

[zoeuvre]

Hi there,

I want to check and see if you are still in need of any help. Please let me know, as I would be happy to assist and answer any questions you may have.

Thanks,

Zoe