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Showing posts with label Heater core. Show all posts
Showing posts with label Heater core. Show all posts

Wednesday, April 3, 2013

Chrysler Town & Country Heater Not Heating Properly

NO heat mode door wont change


2005 Town & Country  heater that isn't heating correctly. The engine temp gauge comes normally, but the air in the cabin stays cold, until I get lucky doing one of several things: 

Tried sliding the temp controls back and forth.
Tried turning the fan control switch off and on, pausing about 5 secs on off, 
Tried going to defroster for 10 sec, then back to vent, or I turn the van off and restart, or I step on the gas somewhat hard while driving..

Any One of those options will usually get hot air blowing and the heater working normally, and it will work correctly for the remainder of the time the engine is warm, but when the van is shut off, and restarted say the next day, it does the same thing. 


Vehicle Details:

Make: Chrysler
Model: Town & Country Touring
Year: 2005
Engine: 3.8L


Expert's Reply On This Problem:

First Understand How The Hot And Cold Air Gets In To The Vehicle:

The Bled door and blend door actuator are the main parts:
The blend door controls the mixture of hot or cold air and is located in the airbox tucked up against the firewall on the floor just under the radio. 
The blend door is moved by an actuator (servo) motor and moves according to the position of the manual heat control position. 
You can check for blend door actuator operation by turning the ignition on, engine off and have everything else off that makes noise such as the blower fan. 

How To Check The Operation Of Blower Fan?

Get down low near the floor, turn the heat control dial in either direction and listen for the motor to actuate. It should move for a few seconds depending on how much of a temperature change you are trying to accomplish. You can do the same thing for the actuator motor for the vent control. 

What If There Is No Motor Noise Heard?

If the blend door doesn't make any noise then it could be bad wiring (unlikely) or the motor itself went bad. If one motor works and the other doesn't then consider replacing the bad motor alone. It isn't too difficult. Both motors are on the driver's side of the airbox above and right of the gas pedal. 

Ok, And What If Motor Is Working Properly?

If the motor seems to be working then either the heater core is clogged or the the blend door is probably broken.

Ok,But How To Confirm If Heater Core Is Working Or Faulty?

You can check the heater core by feeling the input and output coolant hoses on the firewall in the engine compartment. Both should be hot. If one is cool then the core is probably clogged. If it seems OK then the blend door is the probable culprit. 

How Does Identify blend door?

The door is about the size and shape of a long envelope with a shaft on one end that connects to the actuator motor. The shaft seems to be the weak point and it snaps. When it does, the door falls into a default position, which is full cold and it blocks all warm air from the heater. The problem is you cannot get to it or even see it, it is buried inside the airbox.


But as You Mentioned That You Can Heat After Trying Various Things,This States That May Be Heater Core Or Blend Door Actuator Is Not The Issue.

On That Basis The Further Troubleshooting Details Are As Follows:


Intermittent heat problems like yours are usually caused by low coolant level on these vans. So first get the coolant level checked and inspected.
But if the engine temperature seems perfectly normal and coolant level is fine.

Then it actually sounds like there is air in the cooling system causing the lack of heat if the problem happens on both sides at the same time. Running the engine longer and having it at higher RPM's will force the air out of the heater core and coolant in, and then you have heat until it cools down again.


Ok,So From Where To Start?

I would start with bleeding the cooling system. Here's the basic procedure to bleed the cooling system.

With the radiator cap off make sure the coolant level is near the top. Start and run the engine until it's at full operating temperature. Raise the RPM's to about 2,000 and hold it there for 10 seconds or so, do this periodically while it's warming up and especially after the thermostat is open and staying open. Once the upper radiator hose is too hot to hold on to, no air is seen coming from the radiator, then you can do a final top off and cap it. At that point see if you have heat, if you do then it was very likely just trapped air in the heater core.


Ok,And What If There Is No Air In The System?

If there is no air in the system and you are losing heat on both sides at the same time then it sounds like the control head has failed. There is a blend door and actuator for each side of the van and it's extremely unlikely that both of the actuators and doors would act up at the same time and then start working again at the same time.

This Details Will Help.
Thanks.,

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Labels: actuator, blend door, CHRYSLER, Heater core, heater problem, no heat

Sunday, January 27, 2013

Dodge Ram has No Warm Air

NO WARM AIR FROM CABIN VENTS


Thermostat tested good and coolant level is fine.Also there is no engine overheat issue noticed while driving.


It Does get slightly warmer turning it from full cold to full hot.


At our Auto repair garage we have seen lots of such similar and relative cases,when AC and heater both functions but not completely and correctly.

Your case is also one of them.

In your case also the heat is there but not completely warm its getting.

So suppose its ineffective to control temperature at all then i believe the problem is related to  blend door but as per what you described your problem I really don't think that is certainly in your case. Because when turning from cold to hot you get bit of warmness.

The blend door is the door in the heater box that controls temperature. It is driven with an electronic actuator controlled by the control head on the dash.
In your case you receive bit of heat,these confirms that blend door is functioning.So this tells us that the door, control head and actuator are most likely ok.


Also in your description you mentioned that coolant level is fine.
I exactly dont how you checked the coolant level.But if you are confident that its full then on some cases its leaking coolant,also get the coolant leak issue confirmed by getting the coolant line pressure test done.
On some cases we see that problem results due to air in heater core causing these.

If air is caught in the heater core it leads to lack of heat problem. Air can be stuck either from a leak resulting in low coolant level or lack of bleeding the system after a cooling system repair.

But if coolant level is tested full and you don't hear any gurgling sounds from the dash on acceleration then you can rule out air in the heater core.

On such types of problem mostly the possible reason is low coolant or faulty thermostat or issue with blend door or faulty blend door actuator.But if all these most common possibilities if checked ok,then

Most probably on your case its a restricted heater core. Over time dirt,dust and corrosion can develop on the specific cores within where the coolant passes and it puts a stop to coolant from flowing appropriately.
In the same way if there isn't sufficient hot coolant flowing by the core then it can't properly heat the air. As your vehicle model it uses modern heater core brands. And as per modern day heater core design you cannot always depend on being able to feel a temperature variation between the hoses anymore.

To correct these problem i suggest flushing the heater core and that should take care of your problem.
Inspect and clean the heater hoses correctly.There will be two hoses.
The heater hoses located at the firewall and follow them forward. One will go to a tube at the water pump, remove it at that joint. The other hose goes along the right valve cover and will have a coupler inline, remove it there.Before removing the hoses understand its positioning.Refit it same way as it was fitted before.

For flushing,servicing and cleaning the heater core follow the procedure:---

How to Flush Heater Core?


Run water through the heater core using a garden hose, watching the water flowing out.At beginning the dirty water will flow out,let it flow. Once it starts to flow clear water then stop and flow water in the opposite direction. When it starts to run clear again switch back to the other direction. Flush till you get any dirty dustiness in the water.

Then re-install the hoses, bleed the cooling system and you should find that your heat is back.Please make sure no air gets trapped or remain in the heater core.Bleed the cooling system line completely.


These details will help.
Thanks.


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Labels: Heater core, no heat, no warm air from vents

Saturday, November 26, 2011

How to replace Heater core on 2005 Dodge truck?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.

image

Removal & Installation


  1. Disconnect the negative battery cable.
    CAUTION
    After disconnecting the negative battery cable, wait 2 minutes for the driver-s/passenger-s air bag system capacitor to discharge before attempting to do any work around the steering column or instrument
  2. On diesel models, remove the passenger side battery and battery tray.
  3. Remove the instrument panel by performing the following procedures:
    1. Remove the air bag control module (ACM) and bracket from the floor panel tunnel.
    2. Remove the trim from both cowl side inner panels.
    3. Remove the steering column-to-instrument panel opening cover.
    4. Remove the 2 hood latch release handle-to-instrument panel lower reinforcement screws and lower the handle to the floor.
    5. Disconnect the driver-s side air bag module wiring harness connector from the lower instrument panel reinforcement.
    6. Place the wheels in the straight-ahead position and lock the steering wheel. Remove the steering column without disassembling it.
    7. From under the driver-s side of the instrument, disconnect or remove the following items:

      Parking brake release handle linkage rod from the parking brake mechanism located on the left cowl side inner panel.
      Instrument panel wiring harness connector from the parking brake switch located on the parking brake mechanism.
      Three wiring harness connectors (body wiring harness, headlight, dash) from the 3 junction block connector receptacles located closest to the dash panel.
      Head light/dash-to-instrument panel bulkhead wiring harness connector screw and disconnect the connector.
      Instrument panel-to-door wiring harness connector located directly below the bulkhead wiring harness connector.
      Infinity sound system wiring harness connector (if equipped), located at the outboard side of the instrument panel bulkhead connector.
      Stop light switch electrical connector.
      Vacuum harness connector located near the left side of the heater/air conditioning housing.
    8. Under the passenger-s side of the instrument panel, disconnect the radio antenna coaxial cable connector.
    9. Loosen both sides of the instrument panel cowl side roll-down bracket screws about 1 / 2 inch (13mm).
    10. Remove the 5 upper instrument panel-to-upper dash panel screws; remove the center screw last.
    11. Roll down the instrument panel and install a temporary hook in the center hole on top of the panel. Attach the other end to the center hole in the top of the dash panel. The opening should be approximately 18 inches (46cm).
    12. Disconnect the instrument panel-to-heater/air conditioning housing assembly wiring harness connectors.
    13. Using an assistant, remove the instrument panel from the vehicle.
  4. If equipped with air conditioning, perform the following procedure:
    1. Discharge and recover the air conditioning system refrigerant.
    2. Disconnect the refrigerant lines from the evaporator. Plug the openings to prevent contamination.
    3. Disconnect the refrigerant lines from the accumulator. Plug the openings to prevent contamination.
    4. Remove the accumulator.
  5. Drain the cooling system into a clean container for reuse.
  6. Disconnect the heater hoses from the heater core tubes.
  7. Remove the PCM from the dash panel and move it aside. Do not disconnect the PCM harness connector.
  8. In the engine compartment, remove the heater/air conditioning housing assembly-to-chassis nuts.
  9. In the passenger-s compartment, remove the heater/air conditioning housing-to-dash panel nuts.
  10. Pull the heater/air conditioning housing assembly rearward far enough to clear the studs and air conditioning drain tube holes.
  11. Remove the heater/air conditioning housing assembly from the vehicle.
  12. Remove the upper-to-lower heater/air conditioning housing screws and remove the upper housing.
  13. Remove the heater core from the lower housing.

    Click image to see an enlarged view
    Fig. Exploded view of refrigerant line
    Exploded view of refrigerant line

    Click image to see an enlarged view
    Fig. View of the instrument panel
    View of the instrument panel

    Click image to see an enlarged view
    Fig. View of the heater/air conditioning housing assembly
    View of the heater/air conditioning housing assembly

    Click image to see an enlarged view
    Fig. View of the heater core
    View of the heater core
To install:
  1. Install the heater core in the lower housing.
  2. Install the upper housing and the upper-to-lower heater/air conditioning housing screws.
  3. Install the heater/air conditioning housing assembly to the vehicle.
  4. Push the heater/air conditioning housing assembly forward far enough to engage the studs and air conditioning drain tube holes.
  5. In the passenger-s compartment, install the heater/air conditioning housing-to-dash panel nuts.
  6. In the engine compartment, install the heater/air conditioning housing assembly-to-chassis nuts.
  7. Install the PCM to the dash panel.
  8. Connect the heater hoses to the heater core tubes.
  9. Refill the cooling system.
  10. If equipped with air conditioning, perform the following procedure:
    1. Install the accumulator.
    2. Connect the refrigerant lines to the accumulator.
    3. Connect the refrigerant lines from the evaporator.
    4. Evacuate and charge the air conditioning system refrigerant.
  11. Install the instrument panel by performing the following procedures:
    1. Using an assistant, install the instrument panel to the vehicle.
    2. Connect the instrument panel-to-heater/air conditioning housing assembly wiring harness connectors.
    3. Roll-up the instrument panel and install a temporary hook in the center hole on top of the panel and the top of the dash panel. The opening should be approximately 18 inches (46cm).
    4. Install the 5 upper instrument panel-to-upper dash panel screws; install the center screw first.
    5. Install both sides of the instrument panel cowl side roll-down bracket screws to about 1 / 2 inch (13mm).
    6. Under the passenger-s side of the instrument panel, connect the radio antenna coaxial cable connector.
    7. Under the driver-s side of the instrument, connect or install the following items:

      Vacuum harness connector located near the left side of the heater/air conditioning housing.
      Stoplight switch electrical connector.
      Infinity sound system wiring harness connector (if equipped), located at the outboard side of the instrument panel bulkhead connector.
      Infinity sound system wiring harness connector (if equipped), located at the outboard side of the instrument panel bulkhead connector.
      Instrument panel-to-door wiring harness connector located directly below the bulkhead wiring harness connector.
      Headlight/dash-to-instrument panel bulkhead wiring harness connector and install the screw.
      Three wiring harness connectors (body wiring harness, headlight, dash) from the 3 junction block connector receptacles located closest to the dash panel.
      Instrument panel wiring harness connector to the parking brake switch located on the parking brake mechanism.
      Parking brake release handle linkage rod to the parking brake mechanism located on the left cowl side inner panel.
    8. Install the steering column.
    9. Connect the driver-s side air bag module wiring harness connector to the lower instrument panel reinforcement.
    10. Install the 2 hood latch release handle and the handle-to-instrument panel lower reinforcement screws.
    11. Install the steering column-to-instrument panel opening cover.
    12. Install the trim to both cowl side inner panels.
    13. Install the air bag control module (ACM) and bracket to the floor panel tunnel.
  12. On diesel models, install the battery tray and battery.
  13. Connect the negative battery cable.
  14. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  1. Disconnect the negative battery cable.
    CAUTION
    After disconnecting the negative battery cable, wait 2 minutes for the driver-s/passenger-s air bag system capacitor to discharge before attempting to do any work around the steering column or instrument
  2. If equipped with air conditioning, perform the following procedure:
    1. Discharge and recover the air conditioning system refrigerant.
    2. Disconnect the suction line jumper from the evaporator
    3. Remove the filter/drier and bracket-to-heater/air conditioning housing and cowl panel screws; then, move the filter/drier, bracket and refrigerant lines toward the center of the vehicle.
    4. Disconnect the wire harness connector from the fin sensing cycling clutch switch.
    5. Disconnect the wire harness connectors from the blower motor resistor and the high speed blower motor relay.
  3. Cover the alternator to protect it from coolant spillage.
  4. Drain the cooling system into a clean container for reuse.
  5. Disconnect the heater hoses from the heater core tubes.
  6. Remove the right headlight assembly, the grille panel, the right cowl grille support panel and the right radiator core support assembly.
  7. Remove both lower heater/air conditioning housing flange-to-blower housing screws.
  8. In the passenger-s compartment, perform the following procedures:
    1. From the top of the distribution duct, disconnect the blend-air door motor link.
    2. Reach through the glove box opening and remove the heater/air conditioning housing-to-dash panel stamped nuts (2) and screw (1). The fasteners are located below the distribution duct.
    3. Reach through the glove box opening; then, remove the 2 heater/air conditioning housing-to-dash panel stamped nuts. The nuts are located above the distribution duct.
  9. In the engine compartment, remove the heater/air conditioning housing-to-dash stamped nut.
  10. Carefully, separate the lower heater/air conditioning housing from the blower housing.
  11. Pull the heater/air conditioning housing from the dash until the blend-air door link is clear of the dash panel hole.
  12. Remove the heater/air conditioning housing assembly from the vehicle and place it on a bench with the top cover facing upward.
  13. Disassemble the heater/air conditioning housing assembly by performing the following procedure:
    1. Remove the blend-air door pivot shaft nut.
    2. Remove the blend-air door link-to-rear mounting flange boot.
    3. Remove the blend-air door link, the boot and the lever as a unit.
    4. Remove the high speed blower motor relay mounting bracket-to-heater/air conditioning housing screw and remove the relay and bracket.
    5. Remove the top cover-to-heater/air conditioning housing screws and the cover.
  14. Remove the heater core tube support bracket-to-mounting boss screw and remove the heater core from the heater/air conditioning housing assembly.

    Click image to see an enlarged view
    Fig. View of the air conditioning fin sensing cycling clutch switch-1999-01 Dodge Ram Van/Wagon shown, others similar
    View of the air conditioning fin sensing cycling clutch switch-1999-01 Dodge Ram Van/Wagon shown, others similar

    Click image to see an enlarged view
    Fig. Exploded view of the heater/air conditioning housing and related components-1999-01 Dodge Ram Van/Wagon shown, others similar
    Exploded view of the heater/air conditioning housing and related components-1999-01 Dodge Ram Van/Wagon shown, others similar

    Click image to see an enlarged view
    Fig. View of the heater core-1999-01 Dodge Ram Van/Wagon shown, others similar
    View of the heater core-1999-01 Dodge Ram Van/Wagon shown, others similar
To install:
  1. Install the heater core to the heater/air conditioning housing assembly and heater core tube support bracket-to-mounting boss screw, then, tighten the screw to 20 inch lbs. (2.2 Nm).
  2. Assemble the heater/air conditioning housing assembly by performing the following procedure:
    1. Install the top cover and the cover-to-heater/air conditioning housing screws.
    2. Install the high speed blower motor relay and mounting bracket, then install the relay and bracket -to-heater/air conditioning housing screw.
    3. Install the blend-air door link, the boot and the lever as a unit.
    4. Install the blend-air door link-to-rear mounting flange boot.
    5. Install the blend-air door pivot shaft nut.
  3. Install the heater/air conditioning housing assembly into the vehicle.
  4. Push the heater/air conditioning housing into the dash until the blend-air door link falls into the dash panel hole.
  5. Carefully, assemble the lower heater/air conditioning housing to the blower housing.
  6. In the engine compartment, install the heater/air conditioning housing-to-dash stamped nut.
  7. In the passenger-s compartment, perform the following procedures:
    1. Reach through the glove box opening; then, install the 2 heater/air conditioning housing-to-dash panel stamped nuts. The nuts are located above the distribution duct.
    2. Reach through the glove box opening; then, install the heater/air conditioning housing-to-dash panel stamped nuts (2) and screw (1). The fasteners are located below the distribution duct.
    3. At the top of the distribution duct, connect the blend-air door motor link.
  8. Install both lower heater/air conditioning housing flange-to-blower housing screws.
  9. Install the right radiator core support assembly, the right cowl grille support panel, the grille panel and the right headlight assembly.
  10. Connect the heater hoses to the heater core tubes.
  11. Refill the cooling system.
  12. Uncover the alternator.
  13. If equipped with air conditioning, perform the following procedure:
    1. Connect the wire harness connectors to the blower motor resistor and the high-speed blower motor relay.
    2. Connect the wire harness connector to the fin sensing cycling clutch switch.
    3. Install the filter/drier and bracket-to-heater/air conditioning housing and cowl panel screws.
    4. Connect the suction line jumper to the evaporator
    5. Evacuate and charge the air conditioning system refrigerant.
  14. Connect the negative battery cable.
  15. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

----------------
For more help,please check this direct link:---

How to replace heater core for All car models?

Click the link below:---
http://technoanswers.blogspot.com/2011/11/how-to-replace-heater-core-for-all-car.html




Water pump replacing procedure for all vehicles?

http://technoanswers.blogspot.com/2011/11/water-pump-replacing-procedure-for-all.html

All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html


For Instructions regarding All types of car heater problem repairs.

All types of Car heater Problem troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-heater-problem.html


Labels: auto repair solutions, car heater core, car heater problems, car overheating, dodge heater core, Heater core, how to replace heater core, plugged heater core, replacing car parts, water pump
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