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Thermostat is not moving from 160 - 2002 Chevrolet Tahoe

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Replace it?

Posted on Nov 05, 2012

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2002 Chevy S10 blows warm air on all settings unless it is set for the vents I replaced the thermostat as had code for bad thermostat


You may have a problem with the blend door motors on the side of the heater box. As one other person said: "Look at the controls right above the driver's feet area toward the heater box". If they are moving properly all the way, when you move the selectors on the dash, then there may be a problem inside the heater box. If they don't move all the way, then the blend door motors may be bad or binding. Another common problem on these is the control head on the dash not working properly. The control head can be diagnosed with a scanner that can read codes for it. Hope this helps out.

Oct 28, 2012 | 2002 Chevrolet S-10

1 Answer

I have a 1995 ford contour SE 5 speed. it is running hot almost red lining.no fluids are leaking, no antifreeze smell inside, windows do not fog up when heat is on but heat is blowing cold air, fans are...


Could be a thermostat problem, or potentially a blown head gasket.


if you take the oil cap off and check under neath the cap (inside of cap) if there is sludge buildup i would get the gasket checked.


Also try check in the radiator, if it looks like there is gunk or **** in the radiator it may be just enough to block the thermostat sensor. Usually if its a thermostat problem the temperature dial doesnt move.


Firstly would check for head gasket, thermostat and note how fast it heats up, when does it overheat (on idle, driving on highway, driving round town, etc)

Oct 24, 2012 | 1995 Ford Contour

1 Answer

Thermostat


If stuck closed, the thermostat will cause this. See p238 here
http://www.turboninjas.com/camry/eg1.pdf



It is not necessarily caused by the thermostat, though.


A failed temperature sender will prevent the fans from operating, with the same result. Check the cooling fans come on when temp rises.


A head gasket leak to the water jacket will also cause overheating. There is a test to see whether there is any combustion gas in the water.


http://www.youtube.com/watch?v=1_SIwHMLmkM


Your radiator may be silted up too. Then with a 95, if it is still on the original water pump, the impeller may be getting corroded, and is not moving the water around any more.

I'd eliminate the possibilities one by one in the order above.

Sep 07, 2012 | 1995 Toyota Camry

1 Answer

Over heating problems


The radiator fan is probably not working. The fan is controlled by a temp switch, located on the intake manifold, just below the thermostat housing. murf427

Aug 04, 2012 | 2002 Jeep Grand Cherokee

1 Answer

2001 lincoln ls v6 engine overheats when air condition is on?


replace your thermostat and check the waterpump. The ac "pulls" heat out of the air in the car thereby making it cooler, at the expense of making your coolant heat up even quicker than normal. Try this to see what's going on.. Open the radiator cap, start the engine and wait until the car gets up to operating temperature. You should be able to see the water circulating through the radiator...if the fan comes on, and the water isn't moving, then replace the thermostat. If it still isn't moving after that, the water pump may be no good. Id bet on the thermostat. They're cheap and need to be replaced every so often. If the water is circulating and the fan never turns on, then you check the fan motor, relay, etc. There is also a temperature sensor located somewhere next to the thermostat. It's rare to have to replace that, but if it's faulty, then the fan won't turn on and thus overheating occurs. I am assuming here that if you drove your car up a hill without the ac on, it will overheat or get hotter than normal...So....go test your circulation first and let me know what you find. Oh yeah, when you do the circulation test, turn your heater in the car on full blast too...does it get hot inside the car?

Jul 06, 2012 | 2001 Lincoln LS

1 Answer

97 acura 3.2 tl temp gauge doesnt read anything stays at cold doesnt move at all, whats could it be???


Your thermostat which closes when cold to let the engine warm up and opens when the water gets hot and lets it circulate through the radiator. If they stick closed your engine overheats in short order. When they stick open it takes forever and a day for the heater to warm sufficiently. This also makes the engine use more fuel. If your thermostat is indeed stuck open it is easy to tell. With the engine cold, take the radiator cap off and start the engine. If it is stuck open water will immediately circulate as seen at the radiator cap opening. If the thermostat were operating normally you would not see water moving for 5 or more minutes of idling. You should always drain the coolant, flush and refill every 2 years. Never ever grab that garden hose and put tap water in your radiator. They come from the factory with distilled water (about $1 a gallon at any grocery store) which has no minerals in it. The minerals in tap water promotes rust and scale build-up in the cooling system reducing it's efficiency. Don't use tap water unless you WANT to have problems.

Jan 03, 2012 | 1998 Acura TL

1 Answer

The fan work 1/2 mint and he get off , no thermostat , any way to release the air from the radiator , any pic .


There is a bleed valve located on the intake manifold with a small water line running to it. You can burp the air from the system from there. I don't have any pics of it though. It maybe located on the cover that is usually over the thermostat or near there. Toyota has a bad habit of moving it around depending on how they feel that year.

Oct 30, 2011 | 2007 Toyota Corolla

1 Answer

Slight overheating after driving 15 miles. there seems to be no loss of antifreeze. radiator is full. overflow is full. the radiator was replaced 5 months ago both hoses also.


You could go back to the place that did the radiator / hose work to have them check it out. You may pay more for the solution - but it will be complete. You could check (or replace) the thermostat on your own, or continue searching for a possible fault. This can get even more expensive if you start replacing parts.

To check the thermostat - remove it from the vehicle when cold. Be careful to prevent spilling / loss of coolant when removing from car. The thermostat should be closed. Place in a small pot and fill with water to completely cover the thermostat. Heat the pot on stove set to "high". The thermostat should open depending on the temperature value (185 degrees , etc.), but all thermostats should open before the water comes to a boil (212 degrees). If it opens fully, the thermostat is OK. You could reinstall it - or since it is already apart, install a brand new thermostat instead. If it does not open, it should be replaced with a new one.

Check the fan. With the engine running, the fan should be spinning if a mechanical type. If electrical, the fan will turn on and off as determined by a separate electrical thermostat for the fan. When the engine approaches operating temperature, the fan will be switched on. When cooled sufficiently, it will switch off. If the mechanical fan is equipped with a clutch - the fan should be able to be rotated with the engine off. It should offer some resistance - but should turn never the less. The part of the fan in contact with the drive belt shouldn't move if there is a clutch. Under no circumstances should a mechanical fan spin freely, nor should it wobble. Electric fans should spin freely however.

An important note about fans: After driving the car and shutting the engine off, it is not unusual for the electric fan to start up - even without a key in the ignition. Never attempt to touch a car's electric fan blades unless the engine is COLD. Never reach into the fan area or protective shroud of car's mechanical fan when the engine is running.

Another thing that could be causing a problem is the water pump. If it is failing, the coolant will not effectively circulate between the radiator and engine block. This will cause the engine to overheat.

An obstruction in the cooling system will have a similar result. Some "leak stopping additives" can reduce coolant flow in the system to cause similar overheating issues.

Good luck!

Oct 07, 2011 | 1998 Pontiac Bonneville

2 Answers

Replace thermostat. Engine temperature gauge hardly moves and heat into passenger compartment luke warm. Unable to locate thermostat in engine compartment.


The thermostat is where your lower radiator hose meets the engine block. There are three bolts to remove to get to it, if your engine is a V6

Nov 29, 2010 | 1991 Nissan Pickup

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