ever noticed your grids cycling with out a wate to start light? i went out and fired it up and noticed the grids cycling, but it dident give me a wate to start light. its not too cold here, mid 40's.

 

I was in Florida a couple of days ago and the grids where doing their thing also, I was a little surprised.

 

Sometimes my WTS light doesn't come on, but after the truck is started the grid heater starts cycling. I guess it's just a little too warm for the WTS light, but once the truck is running and pulling more cold air they come on.

 

yea mine does it sometimes and sometimes it doesnt

 

gotta remember, it is called a 'wait to START light', once it is started, the heaters energize as needed, but no 'wait to start light', cause it already started