Question about Chevrolet Cavalier

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The temp gage went to extreme hot then dropeed to extreme low then hot, then cold,,,,,then check enging light came on what do i do

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  • Anonymous Mar 29, 2014

    hot and hand cold gos crazy

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Temp.sending unit bad.

Posted on Jul 31, 2010

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2001 Kia spectra thermostat. My heat went out and I am trying to trouble shoot the problem


Will Temp Gage Register any Temp? or is it just an Idiot Light?
If this is the case then You will need to run till it reaches Approximate Operating Temp, Generally 15 mins will get you there @ idle,Feel Hoses from Radiator, Are they HOT? then if you can reach Heater Hoses { usually 1/2 in/ 34 in hose } Are They HOT?, Are You getting Air out of the Vents? Is it Hot or Cold? Check AntiFreeze LVL's in Expansion Tank, Is it Full? or Empty? If Empty Fill With Recommended fluid Mixture

Jan 30, 2014 | Kia Cars & Trucks

1 Answer

Heat goes in and out and the temp gauge goes up and down


Your temp sensor has nothing to do with your heater. The temp sensor needs coolant in order to work properly. So first check the coolant level because if it is low your heater will act the way you describe. Once the coolant gets low enough the heater will blow cold. Another possibility is the radiator cap. After the engine has warmed up it expands when it cools down it contracts. As it is contracting if the cap is weak air can be drawn into the system and cause air pockets to form and will cause the same problem

Feb 09, 2013 | 2000 Pontiac Grand Prix

1 Answer

I have a 2007 Chevy Expreess 1500 van. When ambient temperature drops below say 80f outside I get a P0128 check eng code. If during the day the ambient temp raises above 8-85f the light will go out...


P0128 is a generic code to indicate that the engine isn't reaching proper temp. If it has
the Vortec 4.3 like my S-10 is (I am having a similar problem). Check the overflow
tank as the tube will come off and allow air into the system, also check the radiator
coolant level under the cap. The third item is the intake manifold gasket, check for
seepage. If all these things are good I would replace the thermostat (my S-10 had one
sticking which could actually be seen on the temp gage, it wasn't reaching the normal
195 degrees). If you have the temp gage on your dash watch for low temperature to
indicate a bad thermostat, luckily it sounds as if yours is sticking open as mine did.
Hope this helps.

Mar 26, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

2000 s-type jag 4.0 / engine temp light came on and needle went from cold to hot on the gage.than started making a clicking noise.besides coolant what else can be wrong?


check themortast check coolant sensoir and then check water pump water pump 75.00 had same problem hope u can do your own labor

Jul 04, 2010 | 2001 Jaguar S-Type

1 Answer

Air Condition not very cold.


The pressure on the low side it not very meaningful by itself.
What matters is the difference between the high and low.
The low normally can be up to 120 psi or so, and the high side can be twice that.
But when the AC is running, the low side should drop to less than when it is off.
But there could be lots of reasons for it not being very cold.
The pump clutch could be failing to engage. The release valve should be not opening. The air flaps could be letting heater air in instead of cold. The AC condenser fan fan or relay could be bad.
Etc.

Jul 10, 2010 | 2002 Pontiac Sunfire

1 Answer

What is the check gauges light


CHECK GAGES light (1) indicates a potential engine failure(low oil pressure, low coolant, coolant overheating) has occurred.
· Check gages and shut down engine. Gages should read as follows: Oil pressure 5 to 10 psi (34 to 69 kPa) at idle; Water Temp gage below 230 degrees (110 C).
· Check engine oil level (Para 2-11) if OIL PRESS gage indicates low reading. Check coolant level (Para 2-11) if Water Temp gage indicates high reading. Notify Unit Maintenance if levels are low.

If CHECK ENGINE light (2) is on, check engine oil pressure gage (3) and water temperature gage (4). If both indicate normal, proceed with mission and then notify Unit Maintenance. If either one does not indicate normal, stop engine immediately and notify Unit Maintenance


Oct 16, 2009 | 1999 GMC Jimmy

1 Answer

Temperature/heat wont work/dashboard lights on and off


It sounds to me like you're low on coolant. When you checked the coolant level, did you actually open the radiator cap and make sure the radiator is full? The plastic tank you generally add coolant too is actually an 'overflow' or 'reserve' tank. There is a hose that runs from that tank to the top of the radiator so if the radiator gets low on coolant, more coolant -should- run in from the overflow tank. However in practice this does not always work. I have a Jeep that leaks coolant and experiences this exact same problem. Coolant will not run from the reserve tank into the radiator because the hose is plugged up, and whenever the radiator gets low on coolant the temp gauge will go real high and then drop, and the heater doesn't work well. This is because the cooling system of your car is supposed to be a closed system, full of coolant and no air. When coolant leaks out, the space it used to occupy is now occupied by air, which does not transfer heat well. When 'air' is passing through your cooling system, no heat can be transferred from your engine to the heater and radiator, resulting in a hot engine and no heat at the heater. Then when a pocket of water passes through the system, the temperature gauge quickly falls as the water absorbs the heat from the engine. The hot water that cools the engine is where the heater gets it's heat from as well, so when water passes through the heater core, the heater works, but when it's filled with air, it doesn't.

Feb 12, 2009 | 2001 Pontiac Sunfire

1 Answer

97 GMC Safari Van - Heater takes forever to blow hot air. Could this be a thermostat problem?


Hello,

Humm I make the assumption that you don't have overheating problems. Yes, sounds like a thermostat is stuck open. If you have a gage on the dash you may also notice that the engine temp takes a long time also. Sometimes when you sit a light for a while the temp edges up and starts to get warm....then when moving down the road a higher speeds the temp cools off again. this does this because the thermostat may be stuck open and it cools the heated water in the engine when moving. Also, check the coolant level in the radiator. (only do this when cold!!!!!!!!) ok????? NOT HOT! low coolant can affect how the heater performs. (low volume)

Hope this helped. :)
Chris

Jan 03, 2009 | 1997 GMC Safari

1 Answer

Temp guage goes to max (right) when engine is cold.


change the themostat when you remove the old themostat you should see it stuck in the open postion . before i install the new one i fill the the block with coolant install the new stat run the mtr and heater core until hot iwould also replace the cap

Jan 01, 2009 | 2001 Dodge Ram 1500 Truck 2WD

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