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I have a TMCC 6-28075 where the smoke fan did not work in the past, it would smoke but no fan.  Never got around to trying to fix it.  I have had it for about two years, bought from a member NIB.  Last night the fan just started to work out of the blue.  Tonight no fan.  I was running in command.  I did open it up, drilled the hole bigger to get better smoke, removed the fabric  sleeve from the resistor.  I still get smoke but no fan.  Should I just replace the whole smoke unit, $30 from Lionel, or hopefully my LHS.  The part # is 610 8057 200.  I am guessing just the motor could be bad, but it shows as unavailable.  Assuming it is the original smoke unit, it is 17 years old.  

Thanks

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I have used the MTH motors for those, it's a bog-standard motor.  Drop me a line if you need a motor, it's silly to buy a whole smoke unit for a $5 motor.  For this unit, it could also be the smoke fan regulator components, there are three small parts that regulate the AC for the DC motor, those are also available.

FWIW, it is a big can motor that powers this one, it's the Pittman DC motor.

Is the track power at or near 18 volts?  Did you add some smoke fluid?  About 10-12 drops should do it as it did have fluid.  Since this is an unregulated smoke output, track power directly affects smoke production, below around 14-15 volts, you'll be hard press to see smoke.

Another thing to try is holding the smoke on down for a few seconds, this boosts the voltage and should start the smoke.

That makes no sense, the fan should run anytime there is enough power to have any smoke out of the heater.  They're hard-wired together!  It ran like a top here, I did replace the regulator as it was toasted.

Are you running in command mode with 18 volts on the track?  Did you toggle the ban on with the AUX1-9 key sequence?  Is the fan switch on the locomotive on?

It's really odd that you have no sound on the rollers, I never have that issue if I have power.

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