Question about 1999 Dodge Durango

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One heater hose hot the other cold. can i open heater valve manually?

Nothing yet????????????????????????????????

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1 Answer

Replace it

Posted on Dec 01, 2014

5 Suggested Answers

6ya6ya
  • 2 Answers

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

  • 512 Answers

SOURCE: no heat to passenger area

it sound as if there is the possibility you have a heater core that is plugging up.....restricting the coolant flow and in turn providing no heat....that will require th removal of the heater/acox

Posted on Nov 25, 2008

dennymulford
  • 1055 Answers

SOURCE: heater doesnt get hot

is their a control valve in the heaater hose?
if so it could be stuck

Posted on Mar 04, 2009

GasparMacari
  • 166 Answers

SOURCE: radiator cool, engine temp = 140

sounds like your radiator is clogged, it will bring problems to you soon, you need to flush it really good, i dont think you need to replace it but it sounds like a typical clogged radiator, have it flushed, it you cant ur gonna need to replace it soon, if you keep running that car it might lead you to a temp problem while runing and u might end up hurting your engine...
u also need to check if your thermostat is working properly. go on google and look for the procedure, ur gonna have to take it off and do a test with hot water and a thermometer and see if its working properly.
hope this helps.
have fun!

Posted on Oct 31, 2009

  • 645 Answers

SOURCE: heater control valve location 2000 Durango

In the 2000 Ford F150, you'll find the heater control valve by looking right above the battery. You'll find a little black hose leading to it. ---------------------------------------------------------------------------------
Renault CAN Clip

Posted on Dec 10, 2012

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1 Answer

How do i replace the heater control valve in a 1998 chev.c1500 v6 pu


The heater control valve is located on the passenger side rear of the engine. It has a vacuum line hose that opens and closes the valve. Remove the vacuum line hose, start the engine with the temperature set to cold and see if there is any vacuum on the line. Then set the temperature to the HOT position and see if there is any vacuum on the line. Vacuum should be present on ONE setting only. If nothing happens check for proper vacuum to the control assembly. The valve is vacuum operated, if no vacuum is present the valve won't work.

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I have a problem with cold air from heat vents.


The bypass valve may be stuck open. Try working it manually to see if it is sticking . Valves are usually vacuum or electric . If vacuum actuated, check vacuum lines for cracks or holes. If electric, make sure wiring is intact and properly connected. You may be able to disconnect acuator and manually open valve. Valve may need to be replaced also.
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Dec 16, 2014 | 2004 Hyundai Elantra

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Heat blow cold air


probably heater door that allows heat into the interior not working or whatever controls you have that opens this door defective...1st make sure ur getting heat into your heater core by feeling both hoses which should both be hot, if one not hot then perhaps the valve that opens the water flow through the heater is not opening...sometimes u can see this visibly whereas you can then try to manually open it...

Dec 12, 2013 | 2000 Pontiac Grand Am GT

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1997 toyota tacoma-heater works sometimes but not other times


check heater valve usually in the heater hose to make sure its open both heater hoses should be hot.then listen to here if the blend air door in the heater box is moving and there is nothing stuck up under the dash on pass side blocking the duct,move the hot cold selector back an forth you should hear it open an close also check for vacume leak by heater vale and at the duct assy

Dec 11, 2013 | 2007 Toyota Tacoma

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

1995 jeep cherokee heater problems


Get jeep up to operating temp
Turn on heater to max heat
Hood feel 2 heater core hoses goint into upper passenger side of engine compartment firewall.
They should feel too hot to hold
If it's not hot, could be 6 things
1. heater control valve is bad
2. Vacuum to heater control valve is bad
3. clogged heater core.
4. Bad thermostat
5. Bad waterpump
6. Needs more coolant (check when system is cold)

Do these things:

1. Disconnect vacuum line from control valve and feel under valve to manually move valve to open position. This should let hot water flow through core. If you now have heat inside, replace the heater control valve. Or you can disconnect the plunger on the heater control that is hooked on to the silver bar on the bottom of it. With it disconnected you can manually move it to the open position. It will always remain on.

2. When system is cold, disconnect both heater hoses going to heater core. hook up a water hose to one side of heater core and flush out any gunk. When you get done, the water should run clear. If you see lots of gunk come out, that was probably the problem. Replacement is like $20-30

3. When system is hot and engine running, squeeze the upper radiator hose (using gloves) when you release it you should feel a surge of water. Proves your water pump is working. If no surge, check thermostat. If thermostat checks good, look at the weep holes at the bottom of the water pump for traces of antifreeze. If you see a trace or stream of coolant, indicates bad pump.

4. As far as testing the thermostat, watch as your engine heats up on the gauge. when it gets to a certain point you will see the temperature rise, then lower, then rise again. This means your thermostat opened properly, cooling the system temporarily, then heated it back up. Replacement is around $5

Try these and see how it goes.

Feb 01, 2012 | 1995 Jeep Cherokee

1 Answer

I have a 1998 Buick Park Avenue Ultra. I get cold air from the heater. One hose to the heater core gets hot, one stays cold. I have already back-flushed the heater core and also disconnected the...


If one hose is hot and the other is cold it is because the coolant is not circulating through the heater core. There is nothing else that can cause this. (no valves in the system, etc.)

Make sure that the heater core outlet hose (the one that is cold) is not kinked or pinched to prevent proper flow. If this is OK then replace the heater core. I have seen heater cores that look like they are passing water well enough when flushed with a hose but were too resricted to pass the low-pressure water from the water pump.

Dec 05, 2010 | Buick Park Avenue Cars & Trucks

2 Answers

I have an o2 altama and the heater does not work just cold air any suggestions


With the engine warm and the heat turned on, feel the hoses going through the firewall to the heater core. If one is hot and the other cold, you have a clogged heater core which must be backflushed to clear a blockage.

If the hoses are both cold, move up the hoses until you find a valve. This is the heater control valve. If it is hot on one side of the valve, that valve is clogged or shut. Investigate why the valve is not passing coolant - a clog or the actuator is broken/disconnected.

If both sides of the heater control valve are cold, replace the thermostat. While you have the thermostat housing open, make sure there are no blockages in the connection pipes.

Feb 04, 2010 | 2002 Nissan Altima

2 Answers

Heater is blowing cold air is there a fuse? Or is there a cable that opens to switch it over from cold to hot?


There should be a heater control valve located under the hood in a hose. One hose goes into the firewall which flows through the heater core inside the rear of the dash and another hose coming out and back to the engine. It is probably a bad control valve or maybe the cable is stuck which opens and closes it when you move the knob on the dash. Have someone inside the car move the lever from hot to cold and see if the cable to the heater control valve moves. The rest depends on how handy you are. Should be an easy repair for your local shop.

Nov 30, 2009 | 1994 Oldsmobile Cutlass Supreme

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