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Upstairs vs. Downstairs Cooling Issue

Mantha81
Community Member

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!

5 REPLIES 5

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@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

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner. If my answer solved your problem, click Recommend this Answer below, and If it helped you, please give a Kudo.

Mantha81
Community Member

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

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@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 

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner. If my answer solved your problem, click Recommend this Answer below, and If it helped you, please give a Kudo.

zoeuvre
Community Specialist
Community Specialist

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
Community Specialist
Community Specialist

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