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by JonC
Fri Nov 30, 2018 2:54 pm
Forum: Help and Advice
Topic: Troubleshooting Steps for Zone airflow issue
Replies: 1
Views: 4986

Troubleshooting Steps for Zone airflow issue

Hi, I'm trying to troubleshoot an airflow issue of a 14 yr old house. I have an NCM-300, 2 zones. Zone 1 is upstairs. Zone 2 is downstairs. My downstairs zone seems to have airflow fine. My upstairs airflow has stopped. I checked the duct infront of the flapper, and it was closed, and seems to stay ...