Question about 2002 Ford Ranger Regular Cab

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Water wonr flow through moter...we had put new,water pump,trhemostat

The heater does work , ithought it was heater core,we have done all we know

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  • Ford Master
  • 75,235 Answers

Are the heater core hoses hot? If so then you will need to replace the air temperature control blend door and its electric actuator. If this is the problem you can speed the repair time (10 hours) by using a kit called a Heaterbeater. You can buy the kits on eBay.

Posted on Mar 28, 2014

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75235 Answers

SOURCE: engine overheating

No water pump issues I am aware off, are you sure you bled the air out of the cooling system? If not fill the overflow bottle all the way full, then use a floor jack and raise the front of the car as high as you can ( this allows air to go to top of radiator tank), then run the engine at high idle speed until the cooling fan ( I assume the fan works OK?) comes on, but avoid letting the engine get into the overheat area of the guage, if it does turn it off, run water over the radiator until it cools, check the tank and radiator, top off if you need to and repeat above procedure, if this doesn't work you have some other problem like no or little flow in radiator.

Posted on Jul 27, 2008

  • 566 Answers

SOURCE: Defroster and heat aren't working

hi from uk when engine temp is hot and heat set on max openhood and physically feel both heater hoses for temps ? if one is hot/warm and other cool ? then coolant is not circulating thro the heater matrix(radiator) as you have renewed most parts suspect without success? may i suggest your actual circulation thro the matrix is most likely to be the heater coolant valve which is elec operated as you turn the heat selector in dash both heater hoses connect to this for open/close to matrix of coolant so if valve is failed it is not servicable ? and not to difficult to locate if you follow h/hoses to heater ensure there is power to the actual valve b4 you consider replacing valve easy diy and not too expensive ? hope this helps you ?

Posted on Nov 10, 2008

Dissolu
  • 221 Answers

SOURCE: Heater Core coolant flow 97 F250 Powerstroke

The one that comes out directly from the engine block

Posted on Jun 23, 2009

  • 1114 Answers

SOURCE: heater not heating hot enough. heater core not

Good place to start is a cooling system flush and thermostat replaced.

Posted on Dec 28, 2009

  • 93 Answers

SOURCE: can hear gurgling water in heater core when I rev

you have an air lock in cooling system try bleeding it if it still does it could be exhaust gases in cooling system caused by a leaking head gasket have it checked at garage who have a chemical tester or sniff tester

Posted on Jan 21, 2010

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That sounds like a plugged heater core or heater hoses. At lower RPM there is not as much pressure from the water pump, so the coolant can't circulate through the heater core. Find the heater hoses (in and out) on the firewall. With the car running, engine warm to hot, squeeze the hoses - they should be hot and pretty tight. If they aren't, then something's probably blocking them. Then you'd just have to figure out if if it's the heater core that's blocked or the hoses. You can disconnect the hoses and blow compressed air in to the heater core. Probably a lot of crud buildup. It's messy but it can be done.

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Heater doesnt work blows cold air, replaced thermostat and flushed heater hoses appears to have no flow through heater core, but lines arent plugged on a 1995 gmc sonoma. Why is the hot air not flowing...


This is what I did to solve the exact same problem.I got a pump that you can hook to a drill that has garden hose connections on it.I made 2 hoses to pump into my heater core and hook to the pump. I bought some radiator cleaner at Auto Zone and put it in a 5 gallon pail with about 2 gallons of hot water.I pumped the cleaner from the pail into the OUTLET side of the heater core.(By going in the outlet side you are back flushing the core.) I put an old cloth over the top of the bucket and let the outcoming cleaner run onto this cloth acting as a filter for the dirt coming out of the heater core and let the pump run about 10 minutes. Believe me,A LOT!!!!!!!!!!! of dirt,rust etc. came out of my heater core. The heat now works excellent! Good luck.

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Went to dealership to repair heater core on 2002 a4 1.8T.they now tell me that after they installed the new heater core and bleed the system the watr pump failed and now needs to be replaced oh and by the...


The water pump failure sounds fishy to me. I avoid dealerships at all cost. They tend to overcharge , and fix unnecessary stuff.
The timing belt on the other hand should have been done at 100,000 km / 60,000 mi

Nov 06, 2009 | 2002 Audi A4

1 Answer

No heat, heater core is good,blower moter works


Check the operation of the heater control valve. If it doesn't open up no heat. If the cable moves the control on the valve take the valve off and check it manually. The lever may work but the valve still doesn't open.

Sep 30, 2009 | 2002 Mitsubishi Galant

1 Answer

No hot air from heater, blower runs fine


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.

Since you state the 2 things you ruled out, that leaves only the water pump. Is the car running hot? The thermostat may be sticking as well... but im leaning toward the pump.

Jan 21, 2009 | 1994 Cadillac DeVille

2 Answers

No heat! changed fluid, thermostat. Was going to check control valve but don't know where it is. if that is not the prob should I change the core


This problem is one i have encountered on a number of vehicle not just your brand. The problem seams to be in the controls switches and sending units. you have change lot of parts but did you check to see if you had flow through the heater core.Remove the heater hose's from the engine going to the fire wall. This is not precise in how you get the hoses off, however you do it? Once the hoes are off take a garden hose and try to run water throught the heater core. If you do not have a flow you need to find the closed valve. You may need to block off the hoses to the engine so you can run it for a vacume system. You may need to cut and put splices in the water hoses to do this. As a lot of engines you can not get to the end of the hoses.
This is not a simple fix as you would think. As i have found the heater hoses are getting warm or hot with the engine running but it is still cold inside the car. The word is no water flow no heat and if you have flow you have a vent door stuck closed. Air conditioner controls can have effect also. you may also may need to check the water pump out put to the heater core. This needs to be done with all the anitfreeze removed so as not to lose it on the ground. If you do remove the anitfreeze you can check the heater core flow by only removing 1 (one ) hose for the firewall to the heater. if you have hose off remember to put the garden hose in the radiator with it one as not to over heat the engine while it is running. you had heat before it a matter of tracking down where the flow has stop or the cause like a bad switch, broken wire or vacume hose.
good luck

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