depends on the grade of heater, the standard heater didn't have any control, but it's a simple fix to get a shut-off from your FLAPS and install it under the hood, available with cable or manual control - example

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics