no heat on right side

I've got a 98 528i

I'm suddenly not getting heat on the right side. I've checked the center verticle dial and it's all the way up, so I don't think it's that. I did just recently replace the blower final stage resistor. Could that have had anything to do with it? I changed it a week ago and have had heat on both sides all week, but last this morning was the first Cold day I've had (15 degrees F.).
Anybody have any thoughts??

Is there a fuse I can check etc.???

Thanks.


Leo