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We have a 1995 fire bird we had the heater core replaced a new thermastat. The car is over heating because the coolant is not circulating it has poor performance also

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  • 20 Answers

The best options for this are there is a air pocket in the lines somewhere, or you have a clog somewhere. The best bet for you is to bring it into a quailfied shop and have them take a look and see if its a simple air pocket or a more difficult issue a clog. Also you may have other issues but these are the simplest and most common issues.

Posted on May 13, 2014

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6 Suggested Answers

6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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motor1258
  • 6674 Answers

SOURCE: No heat. Temp gauge barely moves, but hoses to/from core are hot

Did you run engine from cold, with heater (not defrost) on , rad cap off & wait for rad fan to come on 2 or 3 times before you put rad cap back on? Rev engine slightly and hold it there for 30sec. to 1 min. every once in a while while doing this to aid in increasing flow & remove air locks. If both hoses in & out are hot to touch, then you should be getting heat, and I would start looking at blend/air door etc on heater to make sure it's going to it's proper position.

Posted on Jan 02, 2009

  • 19 Answers

SOURCE: no heat

It sound's like one of two thing's, first open the glove compartment look behind to the left you will see a clear vacuum line going to a goldish in color accuator remove it once the vehicle is at normal operating temp. if you get heat then you have a problem with the vacuum switch, just plug the vacuum hose, you will have to reconnect it in the summer to get the AC working. The other problem could be the heater control valve, located under the hood inline on the hoses going to the heater core, upper passenger side of the fire wall.

Posted on Mar 01, 2009

gordanddar
  • 477 Answers

SOURCE: temp guage showing hot, not getting any heat for 1992 Mercury Cap

If the hoses to and from the heater core are hot , and you say the heater core is hot , then the only answer is that the air duct that flows into or out of the heater core plenum ( housing ) is not opening.
Heater control on dash borad inoperative.
Not sure about 92 capri , some cars have a cable linkage , some work on vacume motors.
Try to find a haynes manual for your car , they will walk you through almost every step of anything you may ever want to do to your car.

You seem to know what you are doing , but I gotta ask ........the heater core you felt was up behind the dash inside the passenger compartment of the car right ?

Posted on May 10, 2009

blubanshee
  • 48 Answers

SOURCE: heater core replacement

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You have to remove the entire front of the heater case to change thecore. This usually looks a lot easier in print than it actually IS.Theinstructions say to remove the lower part of the dash for access; usually youdon't have to remove the entire dash for this type of service, althoughsometimes it makes things easier if you loosen and remove any components notmentioned in the procedure that are in your way.
This kind of repair can be frustrating, as it involves working in tightplaces and with 1/4 drive extensions and universal sockets to get all thefasteners out, but it IS possible.Here is what I have for the factoryprocedure. I don't know of any shortcuts to make the process easier; if you can'tget it off, perhaps removing the dash completely for more room would be aviable option...


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Posted on May 27, 2009

bobiii84
  • 65 Answers

SOURCE: Have no heat. Have replaced heater core,

I don't know your vehicle, but does it have a blower door tucked in where the heater core is? If it DOES and that's broken then it could be the whole problem. It would mean it isn't switching from the A/C side of things to the heat side of them. Hope this helps, good luck! Also, just looked up the proper name for what I'm talking about, it's called a "blend door" and I think your car has one. It's what I would check, again, good luck!

Posted on Jan 20, 2010

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1 Answer

I have a 2000 jeep wrangler when I turn on the heat or defrost I can hear it running but I get no heat. What could cause this heater coil, thermastat or something else maybe?


Is coolant level full? To check if the heater core is circulating coolant, feel both heater hoses where they enter the firewall-both should be hot when car is at normal operating temperature. If only one is hot, look for a heater valve in the heater line-make sure it is open so the heater core circulates. Not all vehicles have such a valve, in fact, I think most don't have the valve, but you could check. The valve may be cable operated or vacuum operated to open and close. If no valve, and one hose is cold, there may be an air block in the heater core. Crack a line loose to get coolant circulating.
If both hoses are hot, it is probably the doors in the heater case not operating properly. Watch the door actuators when you move heat from cold to hot, and when moving from defrost to another setting. The temperature blend door is probably on the passenger side of heater case. These doors may be cable operated, vacuum operated, or electrical motor operated. If you watch for their operation, you might see or hear the problem with them not opening or closing properly.
Good luck.
If both heater hoses are hot

Jan 01, 2013 | Cars & Trucks

1 Answer

My 1995 Honda passport blow cold air from heater I had thormostat and coolant replace and nothing still cold air what can I do to correct it?


the engine is working fine, there is no heat. the coolant is not circulating into and out of the heater core. so you have a circulation problem.

1) there is an air bubble in the core,
2) there is a bad valve in the heater hose operated by the switch which turns the heat on,
3) or the heater core is plugged.

work on those , probably the last one as it is most expensive and difficult to repair.

Dec 29, 2010 | 1995 Honda Passport

3 Answers

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

Nov 04, 2010 | 2000 Ford Expedition

1 Answer

Heater is blowing cold air , i`ve changed the thermastat,what else can it be


If your engine is reaching normal operating temperature, you have one of 2 possible issues, either the hot coolant is not circulating in the heater core, or your ventalation system is not allowing the cabin air to circulate thru the heater box. To determine which issue is causing you the problem, raise your hood and locate the 2 hoses going thru the firewall on the passenger side, (note: do not confuse these with the 2 a/c coolant lines that go to your evaporator), one of the hoses is an inlet for the heated coolant, and the other is a return. Let the car warm to proper operating temp, then feel both hoses, they should both heat up. If not, the heated coolant is not getting to the heater core. If they do, then you have a problem with the circluation in your duct system that is not allowing the air to be circulated in the heater box. Good Luck! I hope you find this to be very helpful!

Dec 19, 2009 | 1998 Ford Escort

1 Answer

No heat


Over heat is caused by poor circulation of coolant. This problem can be: 1- The thermostat is not opening ( bad) causing coolant stagnant. 2- Water pump is bad, not circulate coolant. 3- Radiator is clogging up. It is full but water can not going through small clogging up tubes inside to have heat dissipated through the fines.
Since you also have no heat then I think the bad coolant causing the heater core clogged up also, unless the heater valve has a problem not allowing cooling flowing through the bypass hose to the heater core. Correct all 3 things above then you should be OK. Good luck.

Dec 12, 2009 | 2005 Nissan Sentra

1 Answer

1995 cadillac deville 4.9 eng no heat


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

Thank you for using FixYa! A FiXyA rating is appreciated!!

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1 Answer

Does not blow hot air (heat)


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

To attempt to clean the core, you must flush the system multiple times. If this does not work, the core cannot be cleaned and must be replaced.

Jan 16, 2009 | 1995 Jeep Grand Cherokee

3 Answers

I have changed the theromast twice and flushed the coolant system.The heater core is not leaking.. the blower is still blowing cool air.


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Jan 13, 2009 | 2003 Ford Expedition

1 Answer

POOR HEATING


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Jan 13, 2009 | 1995 Toyota MR2

2 Answers

1994 pontiac firebird HAS NO HEAT


Okay. warm up vehicle, get radiator hoses hot.  Turn on heater, fan on low.  Grip both rubber heater hoses close to the firewall, from the engine compartment side.  They should be too hot to hold for long.  If they are not hot, then you have a lack of coolant circulation to the heater hoses.  If they are hot then access heater core, behind glove box area.  Blend door which moves as you chose HOT or Cold, should be cable controlled, move the controls and be sure the door is actually moving. Keep me posted 

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