I have a Coleman 3300-9051 electric furnace w/AC. The blower continually runs.
Where do I find a repair manual and/or what could be the problem. How do I test it.
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Probably just a stuck relay. Happened to me on my HVAC blower motor this Summer.
There will most likely be a main control board for the furnace and the relay is probably there. As far as testing, you'd have to remove it and supply the voltage that the furnace does, to the right pins, while testing the other pins for continuity/disconnect. You'd need info specific to your furnace/relay to do that (as well as knowing and following the appropriate electrical safety rules) I wouldn't just replace it without testing as they can cost $35+.