I'm not a mechanic...just purchased a used Thomas C2 (built 12/07), on the dash is an ENG HTR switch. I see on the build sheet this bus has a Wabasto heater. Is this something that can be programmed to run before performing a pretrip? I also noticed the bus has a plug for a block heater in the front bumper.
Webasto heaters can be programmed to turn on with the addition of one of their timers. We use the white one called a NOI timer. (No Operator Interface). We set it and it stays.