water temp gauge

[MJTrippy]

just today all the sudden the temp gauge doesnt move past 110, and i have been driving it for about a hr now and still doesnt move, normal in this weather it goes to 190 but now it doesnt move, checked fuse, (not blown).... dont know what to do and what can i check to fix it????

[ricksza]

Check you coolant level. Do you have normal heat out the vents? If you have normal heat, but low temp readings, probably temp sensor. If low heat also, probably bad thermostat.

[MJTrippy]

yea it still has awesome heat i mean it blows like normal hott air but the gauge still reads low, where is the thermostat? and the temp senser? and yes the coolent level is where it is suppa be thanks....

[blazee]

If you heater is working good it's probably your temperature sending unit and not the thermostat.

FYI:

The thermostat is in the housing where the upper radiator hose enters the top of the engine.

And I believe your temperature sending unit should be on your driver side cylinder head right above the number 3 and 5 sparkplugs. It will have a small wire connector going to it.

[MJTrippy]

Originally Posted by blazee

If you heater is working good it's probably your temperature sending unit and not the thermostat.

FYI:

The thermostat is in the housing where the upper radiator hose enters the top of the engine.

And I believe your temperature sending unit should be on your driver side cylinder head right above the number 3 and 5 sparkplugs. It will have a small wire connector going to it.

hello now where is the sending unit like how many wire's are going to it? and whats it look like from the outside


thanks

[BlazerLT]

Originally Posted by MJTrippy

just today all the sudden the temp gauge doesnt move past 110, and i have been driving it for about a hr now and still doesnt move, normal in this weather it goes to 190 but now it doesnt move, checked fuse, (not blown).... dont know what to do and what can i check to fix it????

Thermostat needs to be changed.

It is stuck open.

[MJTrippy]

where is the Thermostat and now the temp droped to 100 wile it was off and wont even move now no mater how long the motor is on

[blazee]

Originally Posted by BlazerLT

Thermostat needs to be changed.

It is stuck open.

You didn't read the whole thing it's not the thermostat, it is the sending unit.

[BlazerLT]

Originally Posted by blazee

You didn't read the whole thing it's not the thermostat, it is the sending unit.

I read the friggin post.

Just because there is heat doesn't mean the thermostat is not stuck open.

[MJTrippy]

ok now where is the sending unit, like what does it look like i cant see it? how many wires it got on it..... and how do i test it

[blazee]

Originally Posted by BlazerLT

I read the friggin post.

Just because there is heat doesn't mean the thermostat is not stuck open.

did you read the part that says his heater blows hot and the temperature gauge doesn't move? Yes if the thermostat is stuck open it will run cooler, but the temperature gauge will show more than 100.

[MJTrippy]

ok it blows cool air when fist turned on but after about 10 min after driving around like any other day the heat gets hott and temp would read about 190 and blow hott, now still blows hott after driving around 10 min but now the temp gauge dont move now, wont move off of 100

[blazee]

"your temperature sending unit should be on your driver side cylinder head right above the number 3 and 5 sparkplugs. It will have a small wire connector going to it." If you take a look it is pretty easy to see, it is a few inches above the back two sparkplugs on the driverside and about half way between them. looking down it will look like a stud (almost like a sparkplug) with a wire harness plugged into it.

[Turbocpe]

It would be good if you could have someone hook up a scantool to your Blazer so that they can read what temperature the engine is reporting to the computer itself.

Sure would save replacing parts that aren't needed.

Judging by the info here, I would suspect the sending unit or gauge, especially if you have "awesome heat" still.

[BlazerLT]

Originally Posted by blazee

did you read the part that says his heater blows hot and the temperature gauge doesn't move? Yes if the thermostat is stuck open it will run cooler, but the temperature gauge will show more than 100.

That in no way takes a stuck openthermostat out of the equation.

I am not saying that it is not the sender, but let's not jump to conclusions and state that the stat is fine.