I have a Lionel SD 70ace heritage #1209. I recently opened the smoke unit up as it kept tripping the controller when turned on. The batting was stuck to the resister and charred. Replaced the batting and put everything back. Turned smoke unit on and the fan does not work now, it does smoke passively. Additionally, when I press the smoke level on the legacy remote it doesn't make the "sniff" noise.
I re-opened the smoke unit and made sure all wires were connected. Then used 9 volt battery on the fan motor and it worked. Any thoughts? Bad motor? Bad board? Appreciate any help.