Originally Posted by a64pilot
Fail safe thermostats are marketed, but they really arenít fail safe. Basically more marketing
This is Stantís FAQ, and I trust Stant myself.
Well Stant need to get with the 21st century. MotoRad thermostats have a dual action and lock open with an overheat.
Your right. They lock open with an overheat, if and only if they happen to be open, but if they are failed closed, they stay closed, there is no device that will open them.
Read Stantís FAQ, thatís covered, and why I put the link here