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BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22680
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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Thanks. New house as of April. Have the EMM3 zone system.

Customer Question

Thanks. New house as of April. Have the EMM3 zone system. Not at home but troubleshooting an issue.
Submitted: 2 years ago.
Category: HVAC
Customer: replied 2 years ago.
I have a 2.5 ton that pushes my main living areas. I have a 3 ton that pushes 3 separate zones (don't ask me--I didn't design/build it!). : )Anyway, the zones are master, kids rooms, bonus/upstairs. The bonus won't stay cool during the hot afternoons until I turn off the kids. Then it cools down normally/reasonably quickly. If I don't do that, it gets into the low 80s. Seems strange...
Customer: replied 2 years ago.
I'm a fairly handy/DIYer, so don't think it will be tough to troubleshoot.
Expert:  BillyHvac replied 2 years ago.
does the master have the same effect?
do you know where the dampers are?
use reply
Customer: replied 2 years ago.
I can't test the master effect til we have a hot afternoon. Prob in next few days. I did check the panel, and the orange is flashing. Would a DATS failure cause a zone to not cool, possibly?
Customer: replied 2 years ago.
didn't see the dampers but will dig a bit deeper tomorrow.
Expert:  BillyHvac replied 2 years ago.
I am wondering if the affected area had the damper installed after the the other instead of parallel.
If the dampers were in series it would explain why the unit cools when other shuts down
Customer: replied 2 years ago.
Ahhh. I get what you are saying, i think. Will be interesting to uncover the issue.
Expert:  BillyHvac replied 2 years ago.
I have seen many systems installed by convenience and not design.
If you can locate dampers and rough sketch design I can assist further.
Customer: replied 2 years ago.
Actually have a friend coming over that is in the business coming by at 9:30.will advise what the issue is or if further assistance is needed. Thanks!
Expert:  BillyHvac replied 2 years ago.
Excellent...on site and seeing is much better.
I wish you the best. Disregard computer generated prompts
Customer: replied 2 years ago.
If you don't mind I will keep this open. My guy and his daughter were sick so didn't make it out. Hopefully he can get out soon.
Expert:  BillyHvac replied 2 years ago.
Not a problem at all.
Just keep on your end and do not reply until ready.
Disregard computer generated prompts.