I hope someone out there can help me under the control logic and components on my 1994 Lennox G20RE gas furnace.
My fan runs at normal speed when it runs alone.
When the furnace is in the "heat" mode, the fan only runs at minimum speed.
It then overheats and begins to smell like it's burning up. Hot air comes out of the ducts at a minimal airflow rate, especially the overhead return? Ducts.
What component on the BCC2 panel controls that circuit?
Thanks for any help you can offer!