Question about 1998 GMC Jimmy

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Heat only works when temp gets about 220, just change the thermostat, will low coolent be the issue

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You should see heat well prior to this heat, is your coolant level exceeding low? I have seen situations where the coolant level is so low it will not get to the heater until it warms up (by warming up the coolant has expanded thus filling up the heating system more.
I hope this may have helped,
Tom

Posted on Oct 03, 2009

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1 Answer

Low coolent temp


Low coolant temperature is caused by the thermostat being stuck in the passing position. It usually does this when the thermostat fails. You will need to change your thermostat which isn't a big job depending on where it is located on your vehicle.

Jun 18, 2014 | Saturn SC2 Cars & Trucks

1 Answer

Overheating


Most common reason for overheating is 1. low coolent lvl 2. faulty thermostat (stuck closed). 3. Faulty water pump preventing coolent from circulating through engine.

Check coolent lvl in radiator when engine is cool by removing the cap and filling it up till you can see the coolent, replace cap and try. If you have the proper lvl of coolent. Replace your thermostat, which is located under the thermostat housing (right underneith where your top radiator hose connects). Fill with coolent and see if that helps. Next test is to start the car and let it run till it gets to normal operating temp or near (180 to 220 degrees F) Pinch your upper radiator hose and see if you can feel a gush, or flow of water rush through the hose when you release your pinch hold on the hose, (by pinch, I mean to try and totally squeeze the hose together) If you don't feel the rush of coolent through the hose, then your waterpump is faulty. If your car quits overheating, but your heater hoses don't get hot, then they are probably stopped up at the point where they connect to the engine. Its a common area for gunk, rust, and corrosion to build up.

Dec 09, 2013 | 2000 Pontiac Grand Prix

1 Answer

Lost heat


Didn't mention that your car is overheating, so I will assume that your coolent is FULL and your waterpump and thermostat are working correctly, and that your car does get to normal operating temp (around 180-220 degrees F).. If the above is true, then disconnect the heater hoses from the engine and see if its clogged up with rust and/or corrosion. This spot is famous to get gummed up, restricting coolent flow through your heatercoil.

Dec 09, 2013 | 2002 Kia Spectra

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Hi guys I am new on this, I will start all over, I got this big problem for me, I got this 2002 huyndai elantra gt, 1 week ago I was driving and the heat stopped working, no radiator leak, everything...


Ok, here is my take on your problem. As you may already know, it takes a car a few min. to actually warm up to operating temp. When the coolent reaches operating temp. the thermostat opens to circulate the coolent in the radiator. Now, as your drive, the air pushing against your car will actually blow some air through your heating system ducts and into the passenger compartment. Is it possible that your blower fan isn't working? Because while you are stopped, there would be no air forcing its way through your ducts, thus no heat. As your drive, your car gets up to operating temp, heats up, and the air pressure as your drive will blow some heat out into the passenger compartment? On a side note, if your thermostat is stuck in the open position, it would take it forever to warm up since it is circulating ALL the coolent even tho it isn't at operating temp. A thermostat stuck open will take 30 min or more before you actually feel any warmth, if at all in the winter.. your thermostat opens and closes constantly as the engine is running to keep it at its normal temp, usually around 160-180 degrees. If you live where it gets really cold, a thermostat stuck open likely will never get warm. If your blower motor works, and your engine don't overheat, im 98% sure its your thermostat.

Dec 05, 2013 | Cars & Trucks

1 Answer

I think I need a thermostat for my 2009 Pontiac Torrent, Heat comes and goes, I checked and I have coolent


Its possible the thermostat is not working correctly, but quick changes with the heat is usually from being low on coolant or a problem with the blend doors under the dash.
Your temp gauge should be going up and down if the thermostat is not working right. And it would take a few minutes for a change to be noticed. As the thermostat closed the engine would heat up, then cool down if it opened.

Jan 23, 2013 | 2009 Pontiac Torrent

1 Answer

Dodge shadow poor heat


Possible causes include low coolent level ( I know it sounds wrong, but if the coolent level is low hot coolent won't circulate to the heater core)

The thermostat may be stuck open, if it is the engine won't reach proper operating temp. Only solution is to replace, but it is easy to do and thermostats are inexpensive.

Heater core may be plugged, this is more likely if stopleak has ever been used to stop a radiator leak. Solution would be backflushing the heater core.

The valve that controls the flow of coolent to the heater core could be stuck or defective or the vacuum switch that controls the valve might be defective.

Jan 22, 2013 | 1994 Dodge Shadow

1 Answer

1998 ford taurus no heat,replaced thermostat,heater core and the blend door motor seems to be working, flushed radiator, and still no heat, any suggestions?


You might have to purge the coolent system cause when you change stuff like that you normally have to bleed the the colent system. So what you have to do is run the car untill your temp gets to 195 degrees the cut the car off and let the coolent drain down and then refill and geep doing that untill you have heat.

Jan 09, 2010 | 1998 Ford Taurus

1 Answer

INTake replaced but still having issues


me I would check the thermostat it may be sticking if it wereto stick shut it would cause the gauge to act iratic and even if you have just replaced it it still may be bad my advice it will cost a few dollars more buy it from the dealer they always seem to work and last longer if not that may be plugged up radator hope for the thermostat

Mar 04, 2009 | 1999 Chevrolet Venture

1 Answer

Coolent light and check engine light


Your thermostat will not affect the heat in your car. This is controlled by the heater core which is pulled from coolant from the engine where the coolant will be the hottest. Your thermostat opens and allows the coolant from the engine to circulate into the radiator and the coolant from the radiator flow into the engine. A thermostat is cheap and easy to replace. The sensor should be a fairly inexpensive and easy replacement as well. I would change out the sensor first because bad thermostat would create an overheating problem.

Nov 20, 2008 | 2000 Pontiac Grand Prix

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