Thanks DaveYou can't have two controls running the same motor at the same time, you have to switch either one in...
That's what I was hoping, I just wanted some opinions because I don't want to burn out the motor since moving an iron stove to be able to replace the motor is not a great time.You can probably get away with just adding the external control in series with the power supply leads. But you would need to set one control at max to use the other one. At any rate, that very simple method is easy enough to try that it is worth the effort. And if it does not work, then you can add a switch to bypass one or the other. BUT I doubt that you will need to do that.
I keep thinking about that and I can't think of a reason it wouldn't work. I never tried it but again, can't think of a reason it would not work. I also see it as a nothing to lose and everything to gain.You can probably get away with just adding the external control in series with the power supply leads. But you would need to set one control at max to use the other one. At any rate, that very simple method is easy enough to try that it is worth the effort. And if it does not work, then you can add a switch to bypass one or the other. BUT I doubt that you will need to do that.