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No heat at all until thermostat opens - 2003 Chrysler Town & Country

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Since cars were invented with heaters, most all of them take from 3 - 5 minutes or more to warm up enough to make heat for the heater. The colder the outside temperature, the longer it takes, usually.
I remember in the mid 1950's a Buick I knew of had an electric heater in it. Never heard of one since. Be blessed.

Posted on Jan 01, 2014


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However when I turn the heat on it does not allow the car to heat up immediately, then when my windows are fogged up it takes time to clear the windows what could this be. thank you

It takes time for an engine to warm up. The heat from the heater comes from the water running through the engine. If the engine is cold, it will take a while for the heater to work. If the engine has a thermostat problem, it takes even longer. The thermostat is not supposed to open until the engine is heated up. If it stays open, the cold water takes a lot longer to heat up. A quick check is when the engine is cold, start it up and with the radiator cap off , have a look in at the radiator water. it shouldn't be flowing as the thermostat shouldn't be open. If the water is flowing on a cold engine, I would say the thermostat has jammed open and that's why its taking so long to heat up.

Nov 19, 2016 | Cars & Trucks

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03 beetle waterpump and thermostat hardly any heat.return line going to bottle has no cooland comming out.the steel fiting on the side of the head seems there a check valve in it

Turn on the heat in the car to full heat an full fan. Remove radiator cap start car and continue to fill overflow bottle/tank until heater starts to blow warm that's when the thermostat begins to open. Keep an eye on matter level -make sure it's full. Replace cap a wait 6/7minutes open cap slowly and with rag and gloves it will be hot. Slowly -continue to add more water. Until full. Replace cap. Shut off motor and wait until it cools about 45 minutes. Remove cap again and add water as needed. Then run
Motor making sure it is full. One more thing most important anytime filling radiator always turn heat on first. If not you will ruin your radiator as they don't swell open they swell closed as to not let water move thru it's internal passages.

Apr 02, 2015 | Volkswagen Beetle Cars & Trucks

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Temperature gage mid point will go back down and back up. heat ok.

You have a sticky "thermostat" valve.
It should stay "closed" until the engine warms up,
then open, to allow more coolant to cool the engine down.
If it is "slow" to open, your engine gets too hot, until it does open.
Then, the coolant cools down the engine, until the thermostat finally closes again.

Feb 24, 2015 | Cars & Trucks

2 Answers

My 2000 stratus fans run non stop so I have no heat. New rad, new termostate. What else could it be.

Even if the radiator fans run all the time, you would still have heat in the car. The thermostat prevents the engine coolant from flowing thru the radiator until it opens.
Could have low coolant and air pockets in the system.

Feb 21, 2015 | 2000 Dodge Stratus

1 Answer

Cooling system how does it operate

The cooling system in necessary to deal with waste heat produced by the internal combustion engine. Each size and type of engine and vehicle will have a unique set of parameters. Of course there is a rather small amount of radiant heat from the external components of the engine and also from the exhaust system. The most common cooling system is liquid to air. The coolant, which is moved about internally by a centrifugal pump in the engine, absorbs heat up to a predetermined point and then is able to transfer the heat out to the atmosphere via the heat exchanger. Coolant is commonly water based. Certain additives are used to both increase density and prevent galvanic action (corrosion). The thermostat is a variable orifice used to restrict the coolant flow into the heat exchanger (radiator) until a pre-set temperature is reached. At that time the thermostat starts to crack open to allow some coolant into the radiator for heat removal. If not enough heat is removed the thermostat opens wider allowing ever more heat removal at the radiator until the thermostat is wide open. This is the point where the radiator must be correctly sized to be able to dispose of all excess heat. Usually a fan is used to force air through the radiator which increases the amount of heat removed.

Dec 14, 2014 | Cars & Trucks

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I have a 1994 Jeep wrangler 6 cylinder. I replaced the cooland and therostat and it opens like it should at about 100 but the air is still cold. Is there something I overlooked?

Hello! Thermostat should be a 190 may have an air blockage...Remove radiator cap start engine and leave cap of until all air bubbles are out (even after thermostat opens)...Cap and test for heat...if there isn't any heat...When that thermostat opens and hot water flows through the upper hose of the radiator that hose will be hot and hard..If you feel the heater hose only one will be hot which means that nice hot water is not passing through the heater core...That could be due to blockage or the control in the car isn't opening the valve on the core...check to see if the heat control is opening the valve...If it is, I would suggest that you purchase a back flushing kit ($10) A plastic tee fits into the inlet heater hose and a garden hose is then connected to the tee...Drain the radiator, remove the thermostat, and turn on the this with heat control on high...The system will back flush out of the top of the radiator and hopefully clean the blockage...Reassemble ...Cap off the tee (cap is in kit)...Install thermostat (190) Is a better choice...Refill radiator...Start engine and leave the radiator cap off until all the air bubbles out............At that point you should have heat...Guru...Saailer

Jan 01, 2012 | Cars & Trucks

1 Answer

On my 2004 Grand Prix, my car has to be running for at least 45 minutes for some heat to work.The yellow light by the heater blinks while the blower comes on and goes off repeatedly until the light is...

It is possible that your thermostat is stuck open. Normally, the thermostat remains closed when starting cold, confining coolant to the engine block and cylinder head until it heats up. Once the coolant in the block is warm (usually within 10 minutes), the thermostat begins to open and let coolant flow into the radiator to cool it down some. A properly operating thermostat will continue to cycle until the coolant reaches the operating temperature of the thermostat--usually around 180 deg F. Then the thermostat will continue to adjust its opening to maintain that temp.

Thermostats can get stuck in both closed and open positions. When stuck closed, the engine will quickly overheat. When stuck open, the engine will take forever to warm up--especially in cold weather because the coolant is continually pushed into the radiator and cooled off before it ever has a chance to get warm. Changing the inexpensive thermostat may help correct your condition.

Jan 25, 2011 | 2004 Pontiac Grand Prix

1 Answer

I get half heat or less when i use the heat on cold days

Sounds like you have a possible problem with your engines thermostat, verify your coolant is full and in good shape, if your coolant is dirty from being left in the vehical over the manufacturers recommended service, drain the cooling system and flush it out until clean water comes out of the radiator drain valve or lower hose of you have disconnected it, refill with the recommended coolant in your owners manual and try to operate your heat if you are still having an issue you probably have a thermostat staying open or partially open replace the thermostat and your heat should work fine again....

Dec 10, 2010 | 2005 Ford Taurus

1 Answer

1990 nissan maxima has no heat after changing thermostat and water pump AC works

make sure system is well bled of air. Open radiator cap and start engine. Run until hot and thermostat is open (coolant flowing in radiator. Keep radiator full and also open any bleeder ports on thermostat housing or in hoses until no air comes out.

Sep 26, 2010 | 1990 Nissan Maxima

1 Answer

Thermostat on 2004 Honda Accord not opening, No Heat

is the heater core leaking?can you smell antifreeze?

Feb 26, 2009 | 2004 Honda Accord

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