Question about 1996 Toyota 4Runner

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1996 4runner.heater gets hot for a few minutes,then gradually starts to cool, well not stay hot

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Thermostat might be stuck open or water pump is shot,

Posted on Dec 07, 2012

Testimonial: "thank you ,never thougt about that.Should have known beter.could call on you again,never owned any car older then 1971.mike"

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Posted on Jan 02, 2017

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2 Answers

1993 ford ranger


Any chance you got an air bubble in the system? Try loosing the return hose from the heater and make sure your getting fluid through the heater core.

Feb 24, 2014 | Cars & Trucks

1 Answer

My 2008 dodge ram temp gauge goes from normal to high ,check gauge lite comes on in a few minutes temp gauge goes back to normal but heater will only blow cold air I,ll shut heater off wait a few minutes...


Souds like it's way low on coolant. The heater will blow cold air when the cooling system is so low that there is no water (coolant) running through the heater core. Then the thermostat opens, it trys to be normal but the system is low so it gets too hot in just a few minutes. If its that low, there must be a leak somwhere.

Nov 05, 2013 | 2008 Dodge Ram Pickup 1500

1 Answer

DEFROST AND/OR HEATER TAKES LONG TIME TO HEAT UP. THEN IT'LL STAY HOT FOR 15 TO 20 MINUTES THEN GET COLD. THEN IT'LL SLOWLY GET HOT AGAIN. SEEMS TO STAY HOT LONGER AT HIGHWAY SPEEDS.


Sounds like a sticking/stuck thermostat.
Does your truck have cooling fans? If so, they should NOT be running when cold. If they are, you have a bad thermo sensor. If you have a temperature guage, what is it doing when you go from cold to hot to cold again?

Dec 14, 2010 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

1999 chevys10 4cyl. little heat, how do i know if it's the thermostat


First make sure the cooling system is full. The best way to test the thermostat is with a scan tool. This will plug into the diagnostic connector and give you the actual temperature when the thermostat opens. It should open at 192 degrees F. Without a scan tool you will need to resort to the old feel method. Start the engine cold and check the upper radiator hose as the engine warms up. It should feel cool and then hot when the thermostat opens. It should not gradually get warmer. Also feel the heater hoses. They should be about the same temperature. If one is hot and the other cold it means the heater core is plugged up.

Mar 22, 2010 | 1999 Chevrolet S-10 Pickup

1 Answer

My 2001 lincoln ls v6, the heater works fine except it doesnt blow out hot air. only cold, the car temp gauge is working normal too


It's possible the cooling system is just a little low on coolant. There could also be a valve in the heater hose that is failing to open and let the coolant flow through the heater core. It could also be the heater core itself. Did it start doing this gradually or did start all at once? If it came on gradually it most likely the heater core or low coolant, if it happened suddenly it's a valving or heater control problem. Good Luck.

Dec 28, 2009 | 2001 Lincoln LS

2 Answers

4.6 liter has one heater hose warmer than the other. may be plugged core,or is ther a fuse to climate control switch?


Look for a heater valve on one of the hoses if there is no valve i would say its a plugged heater core.

Dec 11, 2009 | 1999 Ford F150 Regular Cab

1 Answer

On a hot day the radio reception will stay clear for only a few m


It is the overriding by intersteller priority dimensional language conversion filtering. Nothing to worry about, It can be easily defeated and modulated by tightening your removable Radio Antenae.:-) Good Luck_Ned_

Oct 19, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

Intermitant temperature


Check to make sure your thermostat works right by monitoring the warming up of your engine. With a completely cold engine, start and run the engine for a few minutes, then put your hand on the top radiator hose to monitor if and when it gets warm as the thermostat opens more and more and note the gauge reading( if it works) the top radiator hose should be unbearably hot within 5-8 minutes. If the therm. opens right it should close right aswell, staying open a little while eventhough the radiator may have cooled may be what you are experiencing causing the rapid cooling and is nothing to worry about. The Hose should not get warm very soon after starting the engine. Regarding you gauge, lets take one step at a time, verify proper op. or the therm.

Jan 20, 2009 | 1986 Toyota 4Runner

3 Answers

HEATER DOES NOT STAY HOT IT STARTS THEN IT GOES COLD


Check the heater core for a clog or the heater control valve. The easiest was to check these is allow heater to run for a few minutes and check the two hoses coming from under the hood against the fire wall. They should both be hot. If they are not, you have one of the above problems. Start with the heater control valve and replace it. It is much cheaper than than a heater core. Next, you will need to pull the lines from the firewall and see is rust starts coming out of the lines, if so, you may be able to flush the system and clear the blockage. After that, if it does not work, it will require replacing the heater core, which is no easy or cheap feat.

Let me know if there is anything more I can help you with.

Please remember to rate this solution.

Sep 24, 2008 | 1999 Ford Taurus

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