Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater
Assuming you have A/C on this system, I would look to see if the evaporator is plugged with dust from a failed filter.
That causes the exact symptoms that you describe, assuming the filter is clean and all supply and return vents are open as the system was designed to operate.
Let me know what you find or you rthoughts and I can give you instruction on how to clean. One indication it's the evap being plugged is buildup on the blower blades. That will need to be cleaned too.
Posted on Jan 28, 2009
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Posted on Jan 02, 2017
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