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My thermostat gauge hardly moves even when engine is hot

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  • Cars & Trucks Master
  • 14,384 Answers

Your coolant temperature gauge could be bad,it's by the thermostat housing.

Posted on Oct 27, 2012

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Posted on Jan 02, 2017

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  • 10 Answers

SOURCE: 1994 gmc safari,no heat

sounds like a blend door problem gm uses plastic clips to hold actuator rods that tend to break easiest thing to do is take it to a shop that offers free heater checks. and let them check it out

Posted on Jan 16, 2009

shadtremonky
  • 353 Answers

SOURCE: changed out thermostat on 02 mitshibu montero

check the lower radiator hose it may be collapsing at high engine speed

Posted on Jun 24, 2009

mhamlin63
  • 138 Answers

SOURCE: engine and hood extremly hot new thermostat

Make sure you're using proper amount of coolant in the water. You could have dirty fins or something blocking the front of the rad preventing it from cooling enough or might be rad clogging up. If gauge goes over half way then I'd worry. I'd remove rad and use rad cleaner or get it cleaned professionally.

Posted on Jul 01, 2009

bobiii84
  • 65 Answers

SOURCE: i have a 2004 GMC sierra 4x4.heater and air

Well usually a thermostat is a cheap enough part that I would change it out just cause. Actually I just did that recently with my truck :) Also you can check and see if maybe the temperature sensor is bad and giving a false reading, but I would start with the thermostat if you haven't replaced it. You can always test it in water to make sure it's opening but most times it's easier to just replace. Good luck!

Posted on Jan 13, 2010

  • 93 Answers

SOURCE: Temp gauge goes to hot and engine looses power.

hi.. your coolant temp sensor may be getting a bad reading, it also opperates as a compensator so it may effect the power of the vehicle.. check that the engine is actualy hot when it says and your car will probably run alot better if you change it anyway..

Posted on Feb 10, 2010

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Dec 01, 2015 | 2002 Acura RL 3.5

2 Answers

I have a 2006 Dodge Grand Caravan. Until recently the heat and air worked fine. The temperature gauge is registering to very hot but nothing but cold air blowing. after a few minutes the temp goes back...


First you need to put in a thermostat. On most vehicles it is not a hard or expensive job. The gauge going up to very hot is sign the thermostat is sticking and taking too long to open. The heat is fed to interior by hoses from same system as radiator / thermostat. If thermostat is staying open too much (because it can also stick open when going bad) it will take a long time to get warm. The heater box under dash has both the air conditioner and the heater box in it and if the door is stuck to A/C side you will not get heat. Door is usually opened by vacuum hose, cable, or electric motor. If you can look under dash and see the lever that moves the door you may find it is not moving when you move lever from hot to cold on dash. If cable driven you may be able to see cable not connected or door lever broken. But when engine reads warm on gauge - look under hood for round hoses (the size of washing machine hoses) that go from engine into passenger area and see if they feel warm. If hoses cold you are not getting warm water to system (clog in system or thermostat), if hoses warm then door to heat box not moving.

Jan 11, 2015 | 2006 Dodge Grand Caravan

1 Answer

HEATING ISSUES


One way to tell a bad thermostat in a car is if the car overheats frequently even if there is water in the radiator.Stuck open - no heat from heater, temp gauge hardly moves off of cold.
Stuck closed - overheats engine, temp gauge quickly climbs to hot.listen for any rubbing, grinding, or whining noises from the pump. look under water pump while running, if pump is going bad. water will come out of weep hole on the bottom of the pump. good-day!

Apr 07, 2014 | 2005 Kia Sorento

1 Answer

Tempperature stays on cold does not move


You should feel upper radiator hose to see if its even getting warm at all
If thermostat is stuck open then it will hardly even move
If it feels warm to the touch then its probably a defective coolant temp sender
Most of the time its a one wire connector located near thermostat
If so you can ground that wire to see if gauge moves
If it moves toward hot then just replace the sensor
I need to know which engine and I can give you specific instructions on how to test that circuit and even location of sensor

Mar 03, 2014 | 1999 Mercury Mystique

1 Answer

Where to find water temperature sensor on citreon dispatch 2002


The sensor will be near the engines thermostat housing if not in it the housing. To find that just follow the upper radiator hose to the engine

Jun 21, 2012 | Cars & Trucks

2 Answers

Why does my thermostat gage keep going from cold to hot constantly


I really would like some clarification on that.
If your inside gauge seems to read cold for a while and then just goes hot it generally means either the gauge is sticking or much more likely the thermostat is sticking because it is about to go bad. Actually it has gone bad already if it is staying closed. Now most thermostats have a little bypass hole to let air and small amounts of water through to circulate all the time. this allows the hot water to actually reach the thermostat when it is mounted somewhat from the heat source. If that hole becomes plugged it will give the same effect since the entire engine has to get hot before the thermostat can even start opening. Once it starts opening it gets a rush of super hot water that slams it wide open.
If you don't notice any problems with the engine like water boiling over or any other strange behavior then it is likely the actual gauge in the dash sticking or the sensor malfunctioning.
What you want to do is take a laser temp gauge and get a temp reading off the radiator when the engine is reading hot. this will give you an idea whether or not it is lying to you. bring it over and ill lend you mine. ;)

Apr 19, 2010 | 1999 Acura Integra

1 Answer

1994 Lebaron Convertible No Heat, High Temp Gauge


The heat is made in the engine so if the engine is overheated and nothing else is hot, the water is not moving.
I would have suspected a thermostat also.
I would guess now that you have a dead water pump.

Karl at topgunwon.com

Dec 21, 2009 | 1994 Chrysler LeBaron

2 Answers

How to check thermostat on a 1999 silverado z71


When the truck is cold, with the engine off open the hood and search for for the upper radiator hose, look for a place on the hose to put your hand on it, a place that it's not close to any moving parts, (radiator's fan, and pulleys in front of the engine) now that you have fine a good spot on the hose to check the thermostat, go ahead star the engine and just wait while you keep your hand on the hose.
Ones the thermostat gets hot, it will open letting hot antifreeze flow into the radiator that's when your hand will feel this hot change on the radiator hose. It's a good time to take a look to your temperature gauge, it's too hot or too cold?
if the gauge moves higher than normally does, and you didn't feel a hot change on the hose, that means you have a bad thermostat that it's not opening on time or it's not opening at all,
if the gauge it's below than normally does, that means the thermostat it's open all the time

Nov 01, 2009 | 1999 Chevrolet Silverado 1500

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