Parts list for the 3400-818 Coleman electric furnaces. 16.1KW or 55,000 BTU.
Unlike many newer Coleman furnaces, the Coleman 3400 series was not built to be air-conditioner ready. To make the furnace A/C ready, an A/C control box and upgraded blower assembly were usually added. If this furnace was paired with an air conditioner of a different brand, the A/C control box and blower assembly may be of that brand. For example, adding a Nordyne air condition was common practice.
Click here to view an installation manual which includes wiring diagrams.