That video doesn't answer my ?............what prevents it from NOT OPENING? What guarantees that it will open?

 

around 0:18 secs in, it says that when a regular thermostat overheats, it shuts close. then at 0:33 secs it explains the 2 additional things a fail safe tstat has that when it overheats, it keeps it from closing. thought the video was pretty clear...or maybe i'm not understanding your question.

 

Guess I never heard of a t-stat shutting when overheated.......It's always been my understanding that overheating, caused by a failed t-stat, was due to the t-stat failing to open.

 

that's actually what I thought as well...

 

.....and I still think that's the way it is.

 

A guy on here was using one and he said when his Jeep overheated it worked perfectly. Temp came down to 130-150 an never went over that. Said He pulled it out when he got home an sure enough it was locked open.

Dunno why someone would lie about it. That's why I put the superstat in because the advance idiot told me that's how it worked. Locked open in overheating situations

 

There's no 'open locking' mechanism on Stant t-stat.

 

I'm aware of that now. Thank you.

 

Something didn't work perfectly 'cause it overheated.......and now his heater doesn't work either 'cause his t-stat is locked open. LOL

 

Something did work perfectly, the Failsafe tsat. It locks open to let the coolant circulate freely. It was me who made the claims about the failsafe. it kept me from cooking the head when my radiator became blocked by debris in front of it while driving down the road. Any other thermostat would lock closed letting the engine destroy itself, however the failsafe saved me a big repair and towing bill. Dam roadside cleanup crews and their overly large bags!

 

just curious where did u buy the failsafe from? i can't seem to find any info on them online for the Cherokee (XJ).

 

Bought it at autozone for like 15 bucks something like that

 

Other than that MotoRad "Fail Safe" CLAIM, what evidence is there that any other type t-stat, "WHEN OPEN", will close if it becomes overheated?????

 

The man explained the failsafe locked open when his Jeep tried overheating... what proof more do you need my friend?

 

http://en.wikipedia.org/wiki/Thermostat