Block heater as easy as it sounds?
Ok, so I'm a total noob when it comes to diesel engines. I know what a block heater is, but never owned anything with one on it. Our bus has a block heater I believe (I assume that's what the 110 input on the front is, pic attached). Is it as simple as it sounds, plug it in and it keeps the crank case warmed up to make cold starts easier? Anything I need to look out for?
It's going to be in the mid 30s this weekend and I would like to work on the electrical more, so I'll be starting it after each circuit is unhooked. Would it be worth it to plug it up for a while before I start that process Sunday morning?