Hello everyone. I have a smoke issue with a Premier BNSF 20-2787-1. I bought it used of ebay and everything works, except the smoke. Actually , there was a small amount of smoke when you blew into the smoke stack, which told me the heater worked, but no fan. I removed the shell, inspected the smoke unit by dis-assembling it and saw that the fan moved freely and was not stuck, the wick was not burned or blocking the airway. I inspected the circuit board on the PS2 board to see if anything looked burned (surface mount transistors/chip/resisters) and everything looked good. I checked the solder joints, that all looked good. I re-seated the smoke unit wire harness and checked the wires from PS2 board to smoke unit and that all looked good. I have a Southern Pacific AC4400 which is the same engine (3 volt PS2 board) and compared the wire colors, and connection layout on both engines and they were the same. Put everything back and re-tested.
Then I noticed that when I turned off the smoke function with my remote, when engine is running/idling the heater stops and the fan is spinning (working). Yes, you read that right.... When I turn on smoke function thru remote, the fan is stopped (not spinning) and the heater is on and produces smoke. I then turn off the smoke function thru remote, the heater is off, and fan is spinning. !@#$%!!!!! I never seen this before. I did a feature reset, no change, then did a engine reset (deletes engine from remote), re-added engine in remote, same thing. Any help would be greatly appreciated, great site and thanks for your help.
