This is the first winter with my truck. How do I know if my block heater is working. I had it plunged in last night and it seemed to start easier this morning, but I don't really know. Someone told me that when it is plugged in that the heater would blow hot air right away, is that true?

Is there any way to check and see if it is working, any tests I can do.

Thanks for all you help!

Shawn