How to Troubleshoot a Bad Thermostat

a great video - well made

Something doesn't make sense about your explanation. If you expect the lower hose to be cold, then it would mean the thermostat must be placed between the radiator and the lower hose, to block the hot liquid from getting into the hose.
But because both hoses are blocked by the thermostat, it means initially both are cool, and then when it opens, both get hot.
Or maybe it's different on that car you showed.

Always showing cold on gauge cld bad thermostat put my ford explorer in limp mode

What's the easiest way to change the thermostat in a 2006 Ford escape limited edition???

My thermostat clearly isn’t moving but I’m over here checking 25 times because I have anxiety

Thankth!!!

Very informative and well explained, thank you!

my top hose of the radiator is very hot and the bottom hose is cold what's wrong?

Wow. You should be a science teacher. This is so cool. Thanks for the knowledge. 🫡

very imformative, thanks. I've been noticing that my coolant has gone low a few times in the last 6 months for no apparant reason. Havn't really smelled a leak from the hoses or checked under car to see if it's leaking out, but now even after filling it up my car is running hot very shortly after starting to drive. My guesses are temp sensor, thermostate or water pump. It's a piece of crap 2017 mercedes e300 and i've literally replaced almost every part. Any ideas where to start i don't want to bring it to dealer. One other thing, it also gives me trouble starting it at times. It'll just turn over but not start. Thanks.

Thank you great Video, this will help me to replace thermostat on toyota sienna

Heatervents05dodgeonlycoldblockedquickfix

Dodge ram05 heaterventsstuckonlycoldair

What about if the temperature is goin all the way up where it should be. That could also be the thermostat?

dumps into overflow jug upon shutting down after running while..thoughts? plz

neither of my heater core hoses warm up & it never throws any heat...thoughts? plz

neither of my heater core hoses warm up & it never throws any heat...thoughts? plz

Must see thermostat video

What if both hoses are cold and coolant shoots out the tank even with a cold engine ?

I put coolant in my car still running hot , but I noticed splash marks under the hood is this a symptom of bad thermostat?

So if both hoses on my radiator are hot is my thermostat not working?

He sounds Mexican. If he is listen about vehicle. Trust me.

I've had My 2011 pk ranger 4wd xlt 3.0td for about 4werks and have notice it has always got a cold bottom hose. Usualy I'd think the thermostats or waterpump stuffed ,the temp gauge sits nicely just under half no matter what I'm doing, so I'm starting to think its just that good at cooling the water as it passes through the radiator 🤷‍♂️. Tell me how the top hose gets hot water in it if the thermostat is stuck closed?

Great explanation sir

What would/could be the cause of an LT1 over heating when parking?
The car starts overheating fast when I'm slowly manuvering (Few feet forward, few feet back etc) into a parking space
Car is fine at all other times
Water pump, thermostat, and coolant are all about 1 year old
I bled the system
Fuses and box LOOKED ok
Just put on a new ac delco rad cap
Unplugged the WP to test the fans and the drivers side works but NOT the passenger side
Neither the AC or the heat hasn't worked for over a year btw

very good explanation

As always
Heloooo ur friend is heeree😄😄
My car water pump start leaking so bad yesterday 🤭 my engine ls1 5.7🤧🤧😪