answersLogoWhite

0


Best Answer

Faulty thermostats can manifest themselvs in several ways. Some stick open, some stick closed and some stick in one position for a while then suddenly open or close. The ones that stick open will never allow the engine to completely warm up and you will get cold or cool air coming from the heater. The ones that stick closed will cause the engine to warm normally but then the temprature continues to climb and you can loose coolant and possibly harm the engine. The ones that stick for a while are interesting because the vehicle will run cold then turn warm quite rapidly or more likely the thermostat will stick closed and not open until the vehicle is quite warm and possibly you have started to loose coolant. In any case, the easiest way to detect a bad thermostat is to replace it. If the problem goes away, it was the thermostat. If you REALLY need to know if the thermostat is bad, remove it from the vehicle, put it in a pan of water and bring the water to a boil on the stove. Watch the thermostat. If it opens smoothly when the water gets to the designated temprature then the thermostat is ok. If the thermostat opens suddenly, fails to open or is open when you remove it from the vehicle, the thermostat has failed.

User Avatar

Wiki User

โˆ™ 2011-09-13 04:59:17
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar

Add your answer:

Earn +20 pts
Q: How do you know if a thermostat is bad in a 1994 astro van?
Write your answer...
Submit
Related questions

How do you know when thermostat is bad in 1997 Pontiac sunfire?

how do you know when thermostat is bad in 19997 Pontiac sunfire


How would you know if your thermostat is bad in a ford escort?

how do you know if the thermostat for the ford escort sport 1999 is bad


Can a bad thermostat cause coolant loss in 1994 Dodge Caravan?

No.


1994 Chevy Caprice over heats?

low fluid,bad thermostat, cooling fans are not coming on,bad water pump


How do you know if your home thermostat is bad?

if the indicator light is not getting switched off or on


How do you know when your thermostat is bad?

when the car overheats or you have poor heat coming out of the heater.


How do you know if your thermostat on your Nissan 240sx is bad?

your temp guage will sky rocket if its bad, you may even have coolant a coolant leak (comming out of the the housing of the thermostat). replacing it is easy and cheap.


Why your 1994 fire bird the heater does not blow hot?

most common would be low coolant or bad or open thermostat


If the head gaskets or the thermostat isent bad the why would a 1994 ford probe over heat?

It may be the water pump.


How do you know if the thirmistate is going out?

You will know of your thermostat is going out when your car overheats, then turn on your heater really hot on full blast, then the temp will instantly drop. This is a sign of a thermostat gone bad.


How do you know when a thermostat has gone bad?

Car overheats, your heat in your car stops working


What are the symptoms of a bad thermostat on a 1997 Chrysler Sebring Lxi?

what are the symptoms of a bad thermostat on a 1997 Chrysler Sebring Lxi what are the symptoms of a bad thermostat on a 1997 Chrysler Sebring Lxi


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.


How do you know if your cars thermostat bad?

One Coolant Hose is hot and thew other is cold...


How do you know when you have bad thermostat?

If your engine takes a much longer time for the thermostat heat guage to reach its required level of operatiing temperature then the thermostat may be stuck in the open position which means that it will need to be replaced.


What would cause a 1994 Honda civic to overheat?

Inoperative cooling fan(s) Bad thermostat Bad fan switch sending unit Bad fan relay Blocked radiator cooling tubes (internally)


Would a bad thermostat cause overheating in 1997 ford probe?

Yes a bad thermostat would cause overheating in any car. A thermostat regulates the temperature.


How do you know if water pump is bad is it easy to change?

No water pump is easy to change. You know it is bad if it is leaking, noisy, or if there is no flow of water when looking into the radiator with the engine running. Replace the thermostat at the same time as the pump if it is bad.


How do you know when your thermostat is bad on 2001 Honda Accord?

Any sign of overheating, just replace the thermostat. On a 8 year old car it should be replaced and the cooling system serviced.


Volvo S40 common problems?

Thermostat and thermostat sensor (ect) bad


How do you know if the thermostat in your 1997 dodge neon needs replaced?

Overheating or no heat from the heater are sure signs it is bad. You car is 12 years old, just replace it if you have a suspicion it is bad. You can test the thermostat but why bother? You will have to remove it to perform the test. Just replace it.


Are there ignition relays that could burn out and prevent starting on 1994 Chevy astro van?

yes, they are in the distributor. Take the cap off, remove the rotor and there it is. The problem could be a bad coil


How wood you know if the thermostat is bad?

Remove it from car, then place in cup of boiling water, if it opens and closes properly then it still works, if it doesnt move at all, its bad.


99 grand am is over heating could it be the a bad thermostat?

Could be the thermostat not opening


Can a bad thermostat make ac blow hot air?

No. The thermostat is not likely to be the cause.

Study guides

๐Ÿ““
Create a Study Guide