If the PID has a built in
SSR, you will have to run the 12vdc fan power through the SSR output relay contacts. If, however, your PID has SSR control
you will have to use a separate SSR. The controller I built has SSR control, so I had to use an external SSR. My build thread is here
. I have a diagram in pdf format somewhere. I'll try to find it after work.
El Cheapo Royal Oak charcoal grill (heavily modified and repaired), Chargriller Pro, Webber 22.5" Silver, Webber Smokey Joe, Hibachi, UDS, ECB Square
My name is Monty, dad, or grandpa...depending on who you are.