How to Test a Thermostat | Thermostat Test Boiling Water

How to Test a Thermostat | Thermostat Test Boiling Water

Watch as Budget Build Garage shares a Quick Tech Tip on "How to Test a Thermostat". This short but very helpful explanation of how thermostats work for vehicles will give you the knowledge to diagnose a thermostat. Using hot water to test a thermostat is the simplest way to test the thermostat operation allowing you to better determine and diagnose a thermostat to see if you have a faulty thermostat, or maybe a thermostat stuck open. If your vehicle is showing signs of a bad thermostat, its time to test it with some boiling water.

[BudgetBuildGarage]

Thanks guys for watching!! What method do you prefer when testing a thermostat?

[rbbyinchins]

Simple, informative & to the point!!! No obnoxious music or cutesy irritating gimmicks. No flash and stayed on the subject at hand...no click bait. Just honest helpful information like it should be.. very refreshing...

[danb.]

ALWAYS test a Tstat BEFORE putting it in the vehicle ! I have had new ones fail right out of the box !

[RevtechAutoLLC]

Very informative. Here at Rev Tech we like to know exactly the fault. Sometimes we in the automotive industry tend to just replace it because it’s just what we do….these are some of the very basics that we miss or don’t try and end up wasting time learning what we forgot and costing the customer money and still don’t end up fixing the problem. Great video.

Thank you

[troysnyder]

Thanks so much mate! Simple, informative, and straight to the point!

[charleshoffacker]

Good quality video. Short, to the point, and good quality. Thank you!!!!

[JustinMentionedIt]

Just a tip tho, it can still appear to open and it be the problem, if the wax/guts is bad, worn springs or seals is bad it’ll cause issues but to the naked eye it’ll look like it’s opening and closing normally

[steveporter]

Fab just what I wanted to see, what it looks like in the open / closed state. Off to find a pan cheers

[dereklopez]

This narrowed it down a lot really helpful video thank you

[nelsonricardomontalban]

Thanks brother the was the best video ever it was very helpful and saved me alotta money... You're the best!!!!

[CorvetteTrev]

I got one in the mail, oem gm, and it was just out of the small gm box rolling around in the shipping bag, (not in a shipping box but a bag), so before wasting a bunch of coolant, even though I know these things. I just like to check, thanks. I didn't like it may have been knocked around shipping but works and looks good.

[drorlavi]

Very helpful, thank you very very much 🙏🏽🙏🏽🙏🏽

[tmoroppl]

Thanks for the lecture. Soo informative. Appreciate it.

[abdalqadr]

I like the usa flag behind you
Greetings for you from Iraq 🤗

[TheActualCaveman]

How long did it take to reach its fully open state?

[tankable]

Thank you for this. Learning how to do simple fixes and diagnostics to save money. This just saved me about $300 or more.

[DansGarageNC]

Good video, short and to the point. Thanks.

[unnamedchannel]

I checked mine today and it was jammed half open lol. Wondering why the bus was over heating. I suspect it is jammed in this position and not letting water through. We changed the water pump for good measure. Also going to change the fan clutch for good measure.

[bobrr]

tested 4 thermostats for my older classic. NONE of them opened at the stamped number! IE: 195 degree only partly opened at 205 degrees . had to hit boiling (212) before it opened more!! Finally, I checked a 180 deg. It opened at 195 deg and was fully open at 205deg. My engine requires a 195deg thermo. My car was always running hot. Don't know what's in there now, but ill be swapping it out! Thats how you check thermostats IMHO. 🙂

[manuelsalgado]

I’m testing my new thermostat but it doesn’t open with the boiling water. Any thoughts?