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Put the thermostat in a pot of water on the stove and boil it. Using a thermometer, check the temp. at which the thermostat opens and closes (most vehicles 185 - 215 degrees Fahrenheit). If no thermometer is available, then just the fact that the thermostat opens and closes around boiling tells you it's working (just not the specific operating temp. which matters in some vehicles and environments).
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How do you know if thermostat is defective?
For the cost of a new one, if you suspect it might be bad just replace it.
Water heater thermostat defective?
Of course a water heater thermostat would be defective as water heaters / hydronic boilers would use an Aqua Stat
What can cause insuffcient engine warm up?
A defective thermostat.
What could cause a 2002 Mazda protege 5 to overheat?
Low coolant?Cooling fan not working?Defective thermostat?Radiator clogged or air flow resitricted?Defective radiator cap?Defective water pump?Airbound? Low coolant?Cooling fan not working?Defective thermostat?Radiator clogged or air flow resitricted?Defective radiator cap?Defective water pump?Airbound?
Why do you not have heat in a 1998 Mercury Mountaineer after changing the thermostat?
you might have installed it upside down or the new thermostat might be defective or the wrong temperature range it could also be something unrelated, possibly a blown fuse
What causes a Lexus sc300 overheat?
a. blown headgasket. b. defective thermostat. c. defective radiator. d. no oil, no coolant.
How do you check for a bad thermostat?
U take the thermostat out, get a pot of water, put the thermostat in it and start it to boiling. When the water reaches the temp that the thermostat is designed to operate at it should open , if not , it is defective
Why is the thermostat on your 206 on red when your car is cool?
The Coolant Temperature sensor is defective.
1997 Kia Sportage that suddenly overheats and the AC stops working?
Low coolant?Cooling fan not working?Defective thermostat?Defective radiator cap?
Honda passport is whistling overheating and gurgling in the reserve tank any idea everything is new?
Stuck Thermostat, or defective cooling fan/thermal relay, would be my guess.
Why does a new Chevy crate engine overheat?
Could be defective thermostat, bad fan clutch, insufficient fan shroud, plugged or inadequate radiator, or underperforming water pump.
Why doesnt heater get very warm in 96 jeep?
Thermostat and/or heater core may be defective
