Question about 2003 Dodge Caravan

3 Answers

No heat - when temperature selector knob is turned it stays cold

My 2003 dodge caravan heater will not send hot air when the knob is turned to warm. I changed the thermostat and yes it has plenty of antifreeze. The motor gets warm - like normal and the fans cut on and the waterpump is working. I changed an input switch for the transmission because it started switching to first prematurely as I slow down, which didn't help but I noticed it doesn't shift into first early if I drive in 3 and not overdrive. I have had 3 caravans and this is the 3rd one that has had tranny problems - I had to replace the transmissions on the first two. At least there consistent. I am afraid I might have bumped something while I had my hand wedged down there replacing the switch.

Posted by on

  • wsquared1992 Oct 21, 2008

    Its the heater I need to fix I will deal with the transmission at a later date.

×

3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Dodge Master
  • 19,396 Answers

Check the hoses for any missing part, holes, etc.
If you do not find anything wrong in the air lines, then inspect connections to heater control module.

Posted on Oct 22, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 899 Answers

The heater hoses may be clogged if not then the heater core is clogged, what you can do is see if they can pressure the heater core to see if they can get it unclogged , if not then you will need a new heater core

electech

Posted on Oct 21, 2008

  • jason Oct 21, 2008

    see if it gets warm or hot under the dash on the passenger side at the foot area in a box where you can hear the blower motor fan

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,586 Answers

There shouldn't be anything down near the transmission that would affect your heat output. What I'm thinking is there is a possibility that the heater controls on the dash are malfunctioning, and when you select heat, for whatever reason the system isn't getting the signal to go warm. Would you be able to pull a heater control panel out of a salvage yard? If so, it shouldn't cost more than $10-12 and might be a worthwhile investment. If your controls are not sending the signal to have the air go warm, it'll continue to blow cool/cold.

You might also call a shop and see if they have the capability to scan the car for chassis failure codes, similar to what they do for the engine computer when you get a check-engine light - my Audi has this capability and I've seen it on other cars as well.

Posted on Oct 21, 2008

  • Jeremy Dellow
    Jeremy Dellow Oct 21, 2008

    If they can scan for chassis failure codes, it'll likely pinpoint the cause of the problem. I'd deal with an independent shop if possible though - they're just as competent as a dealer and usually less expensive.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How do I fix the heat


You have one of two problems. The heater core is plugged /
restricted or there is an inoperative internal blend door motor problem. Start the vehicle and let it reach operating temperature. Feel the hoses under the hood that go into the heater core. They should be close to the same temperature. If one is hot and the other luke warm/cold.... the heater core is plugged/restricted. If both hoses are near the same temperature, suspect a defective/non operational blend door motor that controls heat/cold/airflow attached to the heater box assembly

Dec 21, 2015 | 2003 Dodge Stratus

2 Answers

I have a 2006 Dodge Grand Caravan. Until recently the heat and air worked fine. The temperature gauge is registering to very hot but nothing but cold air blowing. after a few minutes the temp goes back...


First you need to put in a thermostat. On most vehicles it is not a hard or expensive job. The gauge going up to very hot is sign the thermostat is sticking and taking too long to open. The heat is fed to interior by hoses from same system as radiator / thermostat. If thermostat is staying open too much (because it can also stick open when going bad) it will take a long time to get warm. The heater box under dash has both the air conditioner and the heater box in it and if the door is stuck to A/C side you will not get heat. Door is usually opened by vacuum hose, cable, or electric motor. If you can look under dash and see the lever that moves the door you may find it is not moving when you move lever from hot to cold on dash. If cable driven you may be able to see cable not connected or door lever broken. But when engine reads warm on gauge - look under hood for round hoses (the size of washing machine hoses) that go from engine into passenger area and see if they feel warm. If hoses cold you are not getting warm water to system (clog in system or thermostat), if hoses warm then door to heat box not moving.

Jan 11, 2015 | 2006 Dodge Grand Caravan

1 Answer

Heater isnt blowing warm air in 2003 grand caravan


Assuming the radiator is full of coolant, you are describing a faulty thermostat. The thermostat is closed when the engine is cold to restrict coolant flow until it warms up.

Feb 01, 2013 | 2003 Dodge Caravan

1 Answer

Have a 1998 dodge caravan blows cold only new thermastst flushed system new anti freeze help


Most likely the problem is a broken blend door inside the heater box or a broken adjuster cable going to the blend door, the blend door inside the heater box is responsible for heater output depending on your temp adjustment on your heater control panel, most likely the blend door is stuck in the cold position allowing cold air to come through the vents verses allowing the blower motor to blow warm air past the hot heater core to produce heat, check the temperature adjuster cable behind your heater controls and make sure its connected and not broken, lastly make sure the blend door isnt broken and operating freely.

Dec 06, 2010 | 2000 Dodge Caravan

1 Answer

When the heater is turned on .. only cold air comes out. I changed the thermostat but this did not fix the problem. Hot air will come out occasionally but not consistantly and does not stay hot. Any help...


If heat comes and goes I would first suspect as defective the flap which lets outside air into the heater box with the movement of the temperature control slider or knob. this may well be hard to get to behind the glove box under the dash.

Nov 22, 2010 | 2005 Dodge Caravan

1 Answer

Cabin Heat is Intermittent / Fluctuates / Cycles


You may have air trapped in the lines to or from the heater core.
If you (still) have a real radiator cap on the radiator, remove it with a cold engine, start and run the engine allowing it to warm up while watching the water/coolant level. Make sure the heater control is set to its highest heat setting while doing this. If it is trapped air, you may see it 'belch' after the engine is warm and the engine thermostat is open. Refill as needed if this is the case.
It's more difficult without direct radiator access and may require several cycles of hot/cold to allow refilling through the overflow.

Dec 10, 2009 | 2002 Dodge Grand Caravan

2 Answers

My a/c won't blow cold and heater doesnt get hot


Is the heater working? Turn the A.C. off with the car at an idle. Turn the A.C. on and listen for the compressor to turn on. (should hear a click under the hood and the motor should change pitch. If no noise, the compressor is not comming on. The o-rings were bad about leaking on these cars, letting out all the freeon. If there is no freeon, the low pressure switch won't let the compressor run.

May 20, 2009 | 1997 Ford Taurus

1 Answer

I have the same problem with my windstar blower is fine but is coming cold air but no heat i dont know what to do can any one show me how to fix it thnx


First, feel the heater hoses going into the firewall under the hood. If they are hot, then you have hot engine coolant going into the heater core. If they are not hot, then you either have a bad thermostat or you are very low on engine coolant.

Next you need air flowing through the heater core so it can come out heated through your vents. If the iar is flowing somewhere else, your temp blend door is not moving because the bend door motor is bad or your temp knob on your heater controls is bad. The blend door motor is an electric motor.

------------------------------------------------
Air Flow Control
Air flow control is accomplished in the following manner:
  • Primary control is through the function selector knob , mounted on the heater function selector switch, which is part of the heater control .
  • The function selector knob has the following positions: OFF, PANEL, PANEL/FLOOR, FLOOR, FLOOR/DEFROST and DEFROST.
  • The heater function selector switch combines a vacuum selector valve with an internal electrical switch.
  • The vacuum selector valve directs source vacuum to various vacuum control motors (18A318) . Refer to the System Airflow Schematic and Vacuum Control Charts.
  • An internal single-pole electrical switch is also controlled by the selector. The switch controls the electrical supply to the heater blower motor switch (18578) .
  • The position of the function selector knob determines the manner in which the system will operate.
  • Each position of the function selector knob is detented for positive engagement.
Temperature Control
The temperature control operates in the following manner:
  • Temperature control of the heater system is determined by the position of the temperature control knob (between COOL-BLUE and WARM-RED) of the heater control .
  • This control knob is connected to a potentiometer mounted in the heater control . This potentiometer is electrically connected to the electric blend door actuator that operates the A/C air temperature control door.


e72a310.gif

  • Movement of the control knob from COOL (Blue) to WARM (Red) causes a corresponding movement on the air temperature control door and determines the temperature that the system will maintain.
System uses a reheat method to provide conditioned air to the passenger compartment.
  • All airflow from the blower motor (18527) passes through the A/C evaporator housing .
  • Temperature is then regulated by reheating a portion of the air and blending it with the remaining cool air to the desired temperature.
  • Temperature blending is varied by the air temperature control door, which regulates the amount of air that flows through and/or around the heater core (18476) , where it is then mixed and distributed.
--------------------------------------------------------------------------------------------------------------------------
inside you plenum box:

09f3f8a.gif

Mar 03, 2009 | 1998 Ford Windstar

1 Answer

No heat for my truck


You have a problem with the temperature control blend door actuator in the air ducting system, this part can't be replaced without removing the dash assembly.

Dec 16, 2008 | 2003 Jeep Liberty

2 Answers

Heater won't get hot on 2005 dodge caravan


there could be an air lock in the system, pluged heator core, a bad thermostate or control modual. try bleeding the air out through the bleeder screew if there is no heat after that have the control modual tested if its okay try having the cooling system flushed then if it still doesnt heat intall new termostate

Oct 22, 2008 | 2000 Dodge Caravan

Not finding what you are looking for?
Cars & Trucks Logo

92 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dodge Experts

yadayada
yadayada

Level 3 Expert

63575 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21981 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Dodge Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...