Question about 2005 Ford Explorer

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Blowing cold air

I replaced water pump thermostat housing heater core valve flushed heater core

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  • Contributor
  • 9 Answers

Maybe you have a problem with the matrix radiator.

Posted on Nov 28, 2014

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Posted on Jan 02, 2017

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SOURCE: heater blows cold air have replaced the thermostat

sounds like the controller went bad use temp checker see what your temp is at inlet of heater core from hose

Posted on Sep 08, 2009

alicantecoli
  • 22219 Answers

SOURCE: I HAVE REPLACE THE THERMOSTAT, HEATER CORE, HAD A

have you checked the inlet and outlet pipe for hot water going through

Posted on Dec 14, 2009

  • 518 Answers

SOURCE: 1999 Ford Taurus, no heat.

Try checking the two pipes that go into and come out of the heater matrix, is one of them hot? if it is there is an air lock within the matrix, Also is the thermostat opening fully? Sorry i know you said you have changed it twice already but take it out check settings when it should open and close, then boil some water and test the thermostat

Posted on Dec 30, 2009

kirkx
  • 2019 Answers

SOURCE: heater does not work. What can be the cause of the

I assume you actually touched the water hoses to make sure they are gotting hot?

But hot water to the heater hoses, does not mean the heater valve is opening and letting into the heater core. Most valves are operated by a vacuum servo these days, although some still use a cable. Have someone operate the lever back and forth, while you watch to see if the valve is getting movement.
If not, it could be the cable, or it could be lack of vacuum to the servo, or it could be the servo is leaking, or it could be you have a computerized climate control that is trying to regulate temperature and not working. The valve is usually out in the engine compartment, because it still get hot even when closed, and you don't want that inside the car in the summer. So you should be able to see if it is cable or vacuum. And you should be able to manually move the cable, or supply direct vaccum to the servo. If you then get heat, you know what it is then.
If you don't get heat even with the valve open, there could also be a temperature regulator. That would be likely under the dash, and is designed to allow exact temperature modualtion, like when you want one side different from the other. And then you run into computer controls again, where I don't have the model experience to help.

Posted on Mar 03, 2010

  • 2 Answers

SOURCE: heater blows cold air. I have replaced thermostat,

Not an expert by any means, but i know my ranger.. I had a small leak at the top of my radiator that still cooled the engine but didnt have enough pressure to get to the heater. The heater hoses travel up over the engine and just were not gettin anything to my heater core. That or make sure the heater control valve is operating.

Posted on Apr 16, 2010

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Blows cold air no heat.installed new thermostat and heater cole.hoses feel hot on one cold on other.


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Heater circuit of coolant system could be blocked by a trapped air bubble or a blockage in the heater core. Try having the heater core back flushed. Any good auto shop should be able to do this for you if you don't know how. To remove the trapped air bubble put a coolant flush valve in the heater core line that returns the flow to the water pump inlet. Connect a washing machine water hose to it then warm the car up, turn the heater temp control knob up to the max then open the flush valve on the heater return line to allow the air to be vented out--close the valve when the coolant flows out.(use caution he water blowing out of the hose will be hot. point it safely away into a bucket to catch the coolant) Check the thermostat for proper operation while you are at it so you know it is good. Put it in water on the stove and bring the water up to the thermostat set temp to see if it opens.

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1 Answer

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It could be the heater control valve make sure the vacuum line is connected to the valve and that it is working properly. If it is not replace the valve. Hope this helps.

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No heat , replaced radiator , water pump, rad. cap , hoses and flushed system twice.blows cool air.whats left?


Thermostat.? if you haven't? Do it first then try it. While the car is running for a while touch the heater hoses that lead to the firewall. if one is cold and one is hot? You have a blocked Heater core. Follow the hoses back to the engine. Unconnect them both. By using a garden hose flush out the heater core do one side and then reverse by doing the other hose Lots of junk will come out so be care ful. Mistake people make is "Flushing the system" That doesn't mean your flushing the heater core.
Seeing that you have done everything else it could be the thermostat which you didn't list or the heater core being clogged. When you finished installing the thermostat and flushing the heater core out. Replenish the coolant system . If you have a bleeder on the thermostat housing? use it . loosen it and top off the fluid until you see fluid comeout of the bleeder. The system being air bound would cause no heat..

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We live in a cold climate. Our 1998 GMC Jimmy Heater will not provide cabin heat. The engine warms normally. We replaced the thermostat just to make sure the coolant was warm enough. The blower operates...


UNHOOK BOTH HEATER HOSES AND FLUSH OUT HEATER CORE
DO IT FOWARD AND BACK FLUSH / COVER DIST. CAP OR YOU WILL
FILL IT WITH WATER / IF IT CLEARS OUT HOOK HOSES BACK UP AND
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1 Answer

The heat in my 93 talon dont work. the fan blows, and i have flushed the heater core. still no heat. it is getting cold in kentucky. please help.


If you have flushed the heater, I assume you did this by removing the hoses from the thermostat housing. If there's still no heat, check

1. the thermostat is actually present. If not, put one in. If the radiator core is in bad shape, or blocked, replace the radiator.

2. the thermostat is not jammed open. If so, replace it and use a new gasket under the cap.

3. Verify that the water pump belt is not loose.

4. Remove some dash panels to get access to the heater core valve. Check that the valve is actually turning when you adjust the dash control.

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Not an expert by any means, but i know my ranger.. I had a small leak at the top of my radiator that still cooled the engine but didnt have enough pressure to get to the heater. The heater hoses travel up over the engine and just were not gettin anything to my heater core. That or make sure the heater control valve is operating.

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try to back flush the heater core. and if that dont work check the blend door it see if it is working.

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you should have hot water on all rad. hoses when the motor is running at a norm. temp. the water is not going through the heater core like it should. you have cutoff valve bad low water are a stopped heater.try a hoter thermostat if none of the above are true.

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