Question about 2001 Plymouth Neon

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No heat changed thermostat flushed engine new coolant

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  • Plymouth Master
  • 3,640 Answers

Did you release air from cooling system when replacing coolant!! if air is trapped in system it will not heat up proper. turn fan on high heat locate bleeder for cooling system, open bleeder with car running. if there is any air in system you will see it come out of bleeder. keep checking for heat. when you get heat bring coolant to proper level. leave top off of coolant recovery tank while bleeding system. put cap back on when done.

Posted on Nov 17, 2009

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

breddi2
  • 126 Answers

SOURCE: over heating

Would have to suggest water pump at this point if all else has failed.

Posted on Apr 25, 2009

sawdust46694
  • 398 Answers

SOURCE: new thermostat,waterpump,coolant,block flushed rad

take the thermostat out and heat it up in a pan of water to see if it will open when it gets hot.
you should see it open when it gets hot.use a cooking thermometer to watch the temp. it should open between 180 and 225 deg.

Posted on Aug 04, 2009

  • 811 Answers

SOURCE: We have a 1999 Chrysler 300 M we have good ac

check valve at and before fire wall penetration should be in line with heater hose 

Posted on Oct 04, 2009

wracefans24
  • 1985 Answers

SOURCE: 98 sable -no heat. changed thermostat, new

Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Posted on Jan 02, 2010

arauzvictor1
  • 466 Answers

SOURCE: no heat in car ,new coolant ,new thermostat

You must purge the system at the top of the thermostat has a stopper to remove the air from the system because if you do not do no good circulation of coolant that would be a first step, then checks if the valve that leads from coolant to the heater works well because if there is not open to the passage of coolant heater. Thanks

Posted on Feb 28, 2010

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If the coolant and thermostat is over 2 year old then it is time to do a coolant flush to get all the deposit out.

After flush fill the coolant reserve tank slowly. I recommend put the car on an oil change ramp to prevent air pocket.

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If you flushed the coolant with the thermostat in, chances are you didn't flush the coolant. Regardless, it's easiest to check the controls inside first. Does the blower fan work? Does the air flow change from floor to vent, to dash as it's supposed to? Does the A/C change temps when knob is turned from cold to hot? Post results.

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WILL A BLOWN HEATER CORE CAUSE A CAR TO OVERHEAT


No a heater core alone will not cause a vehicle to overheat. The heater cores sole purpose is to transfer heat generated by the engine to the blower motor so that you can get heat from your car vents. A person could technically remove the heater core from the vehicle and connect the hoses together to bypass it, and the car will run as if nothing happened, minus the lack of heat in the vents.

If the car is overheating, there are three mai issues that could be happening. 1) The radiator is blocked and not allowing coolant to be cooled off before returning to the engine.
2) The water pump is broken. The engine relies on this pump to move the coolant throughout the engine. It may not leak as long as the gasket is alright but the impeller ( small fans on the inside of the water pump ) could not be turning.
3) Lastly and most commonly is a faulty Thermostat. The thermostat is the valve which opens and closes at certain tempuratures and decides if hot coolant stays in the engine or circulates to the radiator to be cooled off. If the thermostat fails, unless you have a failsafe one, will fail in the closed position keeping the hot coolant in the engine and causing it to overheat.

The thermostat is by far the cheapest of the issues so consider changing that first along with a coolant flush before considering putting a new rad or waterpump. You can usually get a thermostat, 2 jugs of coolant and a flush kit for about 50$ at pretty much any parts store. Becareful however not to drive a overheating vehicle as gasket burning and head warpage can occur, which will require rebuilding th head.

Good Luck

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2003 nissan sentra no heat, over heating


If the engine has overheated, chances are pretty good that you now have a warped or cracked cylinder head and a blown head gasket. Those engines are very unforgiving when it comes to being overheated.

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1 Answer

Flushed radiator. Changed thermostat because prior to flush. engine wasn't heating up properly. During drive, the 1st step in flush procedure, engine heated properly and heater worked properly. Drained and...


Air in the system. Run the engine with the cap off, rev the engine up and this will help purge the air. Fill as needed and keep check on it for a few days.

Jan 22, 2011 | 1995 Jeep Grand Cherokee

1 Answer

The heater works sometimes and sometimes it does not. I have replaced the thermostat twice in a month due to being told I could have purchased a malfunctioning one the first time. My heat came on and...


Your engine is overheating because the coolant is not flowing properly. If you have clogs in the cooling system changing the thermostat is not going help very long. Depending on what the material is that's causing the clog it will eventually prevent your new thermostat from working as designed. Buy a radiator flush kit and flush the system. If your heater core is clogged it may prevent heated water from entering it (that is where the heat is radiated from).

Jan 16, 2011 | 1999 Ford Expedition

3 Answers

We just replaced the radiator and the thermastat but the needle still goes to hot


replace the temperature sending unit. Its right there by the thermostat. You can get this at any auto parts store. just need an open end wrench to change it. they do go bad(found out the hard way several years back). I hope this helps you

Jan 13, 2011 | 1999 Plymouth Voyager

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Luke warm heat in a 2002 expediton


Start with Flushing out your cooling system. Flush it out with Preston Radiator flush, you have your preference of ether the super flush which takes 3-6 hours or the 10 min flush which is good if you don't have the time to flush out your cooling system.

After you have flushed out your cooling system, replace your thermostat and you should be good for another cold winter driving. What happens is that after a few years of the coolant not being serviced, the coolant crystallizes and clogs up the heater core and radiator causing poor circulation. Poor circulation will cause poor heat and or overheating issues to the engine.

Before you go through all that inspect to make sure you have the right amount of coolant in your cooling system.

Good luck and thank you for using fixya

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How do i change the coolant/flush radiator in 2004 ford freestar


Open the petcock on the bottom of the radiator and allow the old coolant to drain.

Close the petcock.

To refill you will first fill the degas container to the cold fill range, leave the cap off the canister. Turn all of the heater controls to warm and turn fan to full. Idle the engine until the thermostat opens. Top off the coolant and put the cap back on. Idle at 3000 RPM for several seconds and then idle again for a minute or so. Check the level and then repeat this 4 times, or until heat is coming from the front and rear heat units.

If you want to flush the system you will have to remove the thermostat and hook up your flush system to the radiator hose at the thermostat housing. Follow the instructions on your flush system then put the thermostat back in. Follow the instructions above to refill.

Dec 12, 2009 | 2004 Ford Freestar

1 Answer

No heat in my 2002 madza mpv.


Two most common causes of your problem are low coolant ( air in the heater core) and a thermo stat stuck open. If you have a temperature gauge and it is reading on the low side. Like 140 Deg or less, you need a new engine thermostat. Feel the top of the radiator tank after the car has been driven. If it is too hot to touch, the thermostat is no the problem. As the system has been flushed and filled I suspect there is enough coolant. Last item on the list is the coolant valve for the heater core. Many cars have a water valve located in line with the supply pipe to the heater core. This valve may be in the engine compartment or under the dash. Check the heater temperature control and follow the cables. One cable most likly goes to this valve. Maybe a cable retaining clop has fallen off

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