CP SD90 6-30026

Need to look at the type of smoke unit.  To have fan not run but element on? would mean some sort of electronic fan control. Model number matters.  G

CP #9108 SD90 Lionel 6-30026  TMCC/ ODY

What's weird is that the +/- buttons do nothing, other buttons like sound etc. will cause the fan to run for a second or two, and holding R down causes the ran to run continuously while you hold the R down. I don't feel any heat coming out. I guess try another receiver...

Check the fan 5V power supply on the smoke unit.  My guess is either the fan power supply is dying or the voltage regulator module for the smoke is dying.  My top suspect for no heat in those is usually the voltage regulator module.

Thanks, I'll check that. I guess I posted the set #. This is the engine...

All good now. In poking around, trying a different radio board to improve the reception and so forth, the engine started to respond like new with the old radio board. Now I remember when I was pressing +/- before, I was not getting the steam sound from the engine. So the signal strength was the issue I guess. I measured the smoke resistor voltage and it is about 7 vac. So I rebuilt the smoke unit, took off the covering over the resistor and new 008 batting. Drilled out the intake hole to 1/4 inch and the gasket. Smokes incredibly well now. I hope there was not a badly soldered pin on a connector. I've been thru that before, but I'll just see how it goes. If the issue returns, that'll be the path I'll take.

Thanks for the help.