by spirit2586 on December 9th, 2006

spirit2586

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2001 Jeep Cherokee with a/c. I cannot find the Heat blend door and all I get is cold air out of the heat vents. Water temp at the heater hose is 190.Thanks spirit2586.

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Answers. 14 helpful answers below.

  • by cgallen on June 25th, 2008

    cgallen

    Neil somehow managed to get the truth eliminated from the site. No denial that the IP was purloined from HeaterTreater or comments on the engineering deficiencies of the knock-off product, just personal attacks. The patent process is long and drawn out and our patents are Pending as stated on our Ebay listings. I have no interest in providing pointers to allow more copy-cat engineering. The HeaterTreater is a professionally designed and tested solution with 100% A+ feedback on Ebay. Here is a re-post of the deleted information.


    Note that this guy bought one of our products, attempted to copy it, and is now selling his "improved" solution on Ebay in violation of our patents and normal business practices.

    He is correct that it is easier to install a single assembly. However, that assembly cannot be manufactured to the exacting specifications required to assure accurate operation at a low cost. With an aluminum assembly there is a generic problem with warping and accuracy of the welded assembly. In our early prototyping efforts we attempted this approach and found significant problems with manufacturing accuracy and variation in the Chrysler box specification over multiple year models.

    The HeaterTreater does require an additional five minutes to tighten two set screws. The difference is that this allows the fix to be custom fit to the specific GC and adjusted for perfect operation efficiency. Any warping and/or manufacturing variation, and any Chrysler molding variation is compensated out of the equation by custom fitting the doors. The doors are covered with a compliant thick PVC foam material that is certified for automotive applications and will 100% seal the doors during HVAC operation.

    Other solutions may be cheaper and on the surface easier, but you get what you pay for. We are working on multiple applications for our solutions and want to keep substandard applications of our IP from creating doubt about the methodologies on the internet.

    Texster68

  • by Neil on May 23rd, 2008

    Neil

    It sounds like you have the usual Jeep Grand Cherokee heater problem! What usually happens is that the passenger side loses heat than shortly after the driver side will lose heat. And you do not have control of the air conditioning temperatures, it just blows out cold air no matter what the temperature is set at. This is the usual symptoms for the blend door failure. For more information on the fault codes, etc checkout the Blen Dor Store on Ebay.
    An easy blend door replacement kit with only two parts to install. No Dashboard Removal. The Blen Dor kit is guaranteed for as long as you own the vehicle. For more information try a search for Blen Dor or visit the Blen Dor Store at http://stores.ebay.com/blendorstore

  • by cgallen on June 25th, 2008

    cgallen

    The Jeep Cherokee has a different HVAC system and plenum box than the Jeep Grand Cherokee. However, the Cherokee suffers from the same root cause problem as the Grand. The blend door is on a vertical axis and the actuator motor is visible on the bottom of the heater box under the passenger side dash panel. You can remove the motor and check the operation of the blend door by manually turning the axle. Most likely you will find that the door is not working properly and needs to be replaced. HeaterTreater has developed a solution for the Cherokee as well as the Grand Cherokee and you can find the product on Ebay or on our web site at www.heatertreater.net, or click on the Google ad next to this posting. Like all of the HeaterTreater solutions, the Cherokee/Wrangler fix is easy and 100% effective.

    Texster68

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  • by Neil on July 14th, 2008

    Neil

    Again my competitor is being very deceitful about my products. He is also being very deceitful to the public. He is claiming that he has DONE a recirculation door repair kit with no dashboard removal. That is not true. His recirc door is a replacement door with a recirc door housing repair. And YOU WILL STILL NEED TO REMOVE THE DASHBOARD according to his Ebay store writeup. No Dashboard Removal does not mean you HAVE TO REMOVE the dash. That is what I would call being deceitful to the public.
    He admits he CAN NOT design and engineer a 99/04 Jeep Grand Cherokee Dual Control repair kit with NO dashboard removal. He throws words around like Attempted (failed?) – Impractical (Not a good engineer?) – Plastic drive components cannot withstand forces. (What forces, how much force?).
    And Again, his other jeep blend door and recirc door products, ideas and methods have also been on the Internet long (Years) before they started producing those designs.
    Could it be that cgallen just produces other peoples ideas? (Stolen?)
    He is worried that better products are on the market that he can’t compete with, unless he does his deceitful smear campaigning.
    Check Ebay for the Blen Dor Store and make an Honest decision.

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  • by cgallen on July 21st, 2008

    cgallen

    cgallen is now down to calling people dump for trying something that he knows nothing about.
    -NEIL

    I can safely say that I have never called any person or idea "dump". If by chance what he meant was "DUMB", I have no comment...make up your own mind. HeaterTreater products are professionally designed solutions from degreed engineers. Check our Ebay listings, customer feedback, and web site for details.

    cgallen

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  • by Neil on July 14th, 2008

    Neil

    Again my competitor is being very deceitful about my products. He is also being very deceitful to the public. He is claiming that he has DONE a recirculation door repair kit with no dashboard removal. That is not true. His recirc door is a replacement door with a recirc door housing repair. And YOU WILL STILL NEED TO REMOVE THE DASHBOARD according to his Ebay store writeup. No Dashboard Removal does not mean you HAVE TO REMOVE the dash. That is what I would call being deceitful to the public.
    He admits he CAN NOT design and engineer a 99/04 Jeep Grand Cherokee Dual Control repair kit with NO dashboard removal. He throws words around like Attempted (failed?) – Impractical (Not a good engineer?) – Plastic drive components cannot withstand forces. (What forces, how much force?).
    And Again, his other jeep blend door and recirc door products, ideas and methods have also been on the Internet long (Years) before they started producing those designs.
    Could it be that cgallen just produces other peoples ideas? (Stolen?)
    He is worried that better products are on the market that he can’t compete with, unless he does his deceitful smear campaigning.
    Check Ebay for the Blen Dor Store and make an Honest decision.

  • by Neil on May 23rd, 2008

    Neil

    It sounds like you have the usual Jeep Grand Cherokee heater problem! What usually happens is that the passenger side loses heat than shortly after the driver side will lose heat. And you do not have control of the air conditioning temperatures, it just blows out cold air no matter what the temperature is set at. This is the usual symptoms for the blend door failure. For more information on the fault codes, etc checkout the Blen Dor Store on Ebay.
    An easy blend door replacement kit with only two parts to install. No Dashboard Removal. The Blen Dor kit is guaranteed for as long as you own the vehicle. For more information try a search for Blen Dor or visit the Blen Dor Store at http://stores.ebay.com/blendorstore

    No comments. Post one | Permalink

  • by sammy d on October 22nd, 2007

    sammy d

    the blend door is accessable if you remove the glove box door. the servo motor is there for the drivers side. passengers servo behind the heater/ac box.

    this is for cherokee with dual zone climate control.....if yours is not dual zone, look here any ways. good luck.

    sam d.
    vancouver

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  • by Behrr77 on January 23rd, 2011

    Behrr77

    It's located behind the glove box. You have to take out the glove box, and then you see the drive motor that controls the blend doors. take it off. it's held on by two phillips head screws. Then to directly access the doors you will either have to cut a small hole in the plastic, or spend some time taking the dash apart to remove the wholee aparatus that holds the blend doors inside of it.

    No comments. Post one | Permalink

  • by RabbitReady on July 29th, 2010

    RabbitReady

    Blend door failure is your problem 100% guaranteed!

    My Grand Cherokee had the exact same problem and I found the easiest fix for it was to cut open the air conditioner box behind the glovebox area and install new doors from JGCParts. The old ones were made from plastic and had broken so I had no control over the temperature. The JeepHeater blend door panels from I bought are made from aluminum and looked rock solid. I got it all done in about an hour and it worked perfect.

    You can find them on Ebay or here http://www.jgcparts.com/JeepHeater.html

    The dealer wanted almost $1300.00 to fix this!!! No friggin way I was going to pay that much money. The internet has a few others selling "solutions" that look like a mess to deal with. It has nuts and bolts and a lot of people have problems with some screw falling loose and then the heater is out again. I wanted a good fix so they weren't the ones for me but you make your own choice.

    JGCParts has the best prices and their service was excellent. Two thumbs up for this product!!

    No comments. Post one | Permalink

  • by Bobbbb on December 22nd, 2006

    Bobbbb

    the blend door is most likely right next to the heater core box. its a tough one to find, i had to find it with my hand. slide your hand back and forth til something moves

    No comments. Post one | Permalink

  • by jeepster68 on May 23rd, 2008

    jeepster68

    The most common cause of these symptoms is broken blend doors. The HeaterTreater is an after market kit that solves heater and AC for the Jeep Grand cherokee and Laredo. It is much cheaper than the dealership fix and is easy to install. For diagnosis and info, check out www.heatertreater.net or search ebay for "heatertreater".

    No comments. Post one | Permalink

  • by Neil on May 23rd, 2008

    Neil

    It sounds like you have the usual Jeep Grand Cherokee heater problem! What usually happens is that the passenger side loses heat than shortly after the driver side will lose heat. And you do not have control of the air conditioning temperatures, it just blows out cold air no matter what the temperature is set at. This is the usual symptoms for the blend door failure. For more information on the fault codes, etc checkout the Blen Dor Store on Ebay.
    An easy blend door replacement kit with only two parts to install. No Dashboard Removal. The Blen Dor kit is guaranteed for as long as you own the vehicle. For more information try a search for Blen Dor or visit the Blen Dor Store at http://stores.ebay.com/blendorstore

    No comments. Post one | Permalink

  • by Neil on June 16th, 2010

    Neil

    First, cgallen and pugmarks are the Heater Treater guy!

    ASK HTer for his Patent application serial number. Everyone that applies for a patent will have an application number.

    HTer will most likely not give you a number. But if he does give you a number or if he does not, the U.S. Patent Office has a web site where you can search for patents, patent applications, trademark registrations and people's names that have applied for or have a patent.

    HTer thinks someone would copy his failed set screw design.

    How many of HTer's customers have to re-tighten those failed set screws before he realizes his design has failed?? Or will he just keep telling people that he will stand behind his product and tell you to re-tighten the loosened set screws.

    Hter is falsely stating that the back passenger's side white plastic drive connector will not withstand the force of the actuator motor. His reasoning is that he has tried and failed to design a viable dual control system.
    He will show you pictures of broken drive connectors and describe to you how he has tried and failed. He will tell you that the back white plastic drive connector is not strong enough to withstand the force of the actuator motor. Hoping you will believe him and not purchase the Blen Dor products. (He does the same thing to the $5.00 recirculation door repair)

    HTer's first failed attempt was to use set screws to hold the blend door on the drive connector. I really do not think and engineer would attempt to put set screws into a plastic shaft thinking the steel set screw would not cut a groove or break the plastic shaft. Just as the set screw cut a groove in the drive connector, it will also cut a groove in his aluminum shaft.

    HTer's other failed attempt was to force a tension fit connection onto the white plastic drive connector. Can you image how tight that steel tubing would have to be, to hold his heavy steel door from loosening and falling, causing the same heat problem again.

    If HTer really did that, instead of just stating false information to potential customers.
    He would have needed to hammer the steel tubing over the plastic drive connector.
    Can you image hammering that steel tubing in a small 5 x 3 access hole.
    How long do you think the drive connector would last, beating it with the steel tubing and a hammer?
    How long would the actuator motor on the other side of the heat box last without breaking.
    No wonder the drive connector broke!!
    He broke it hammering on his steel blend door.
    Even if you did get a tension fit steel tubing on without breaking the drive connector and or breaking the motor, the steel tubing would loosen after the first or second calibration of the HVAC system and cause the door to fall. (Bogus Professional ??) A Professional Engineer would not have attempted to do such a thing.

    The blend doors break because the stop limit pin fails.
    Heater Treater uses this same failed stop limit pin idea.
    Hter's stop limit pin does not break, but it fails in the other direction.
    The stop limit Point on the blend door housing FAILS because of the soft plastic of the blend door housing can not withstand the force and the steel stop limit pin will indent into the stop limit point on the housing.
    Causing the tension to be transferred a little at a time to HTer's set screws.
    Heater Treater admits that his set screw design is not strong enough to take any rotating force. When the stop limit point fails that rotating force will eventually loosen or cut a groove in HTer's aluminum shaft.

    Failure of the Stop Limit Point on the Blend Door Housing

    The indents in the blend door housing's upper and lower Stop Limit points, happened during the testing of the narrow steel roll pin.
    The decision was made to use a stainless steel roll pin for the new stop limit pin, as it is the easiest, quickest and the least expensive means for attaching a stop limit pin to the new drive connector.
    After twenty five mock calibrations Which would be approximately six months in real time the testing was stopped.
    It was evident that the indent being as deep as it was at the 25th calibration (6 months). In one year the depth would approximately double. The stop limit point on the blend door housing had failed.

    The reason the stop limit point failed is that the stop limit pin for the blend door shaft is a narrow round pin, which will cause it to indent easily into the soft plastic 1/8" wide stop limit point.
    The actuator motor calibration tension will transfer to the blend door shaft as the round stop limit pin indents deeper and deeper.
    Eventually the full calibration force of the actuator motor will be transferred to the blend door shaft.
    The Stop Limit Pin alone was not a reliable option as the black plastic housing is soft enough to be indented by the stop limit pin.
    The decision was made to design the blend doors themselves to be stronger than the force it would take to completely stop the actuator motor, with NO stop limit pin. The stop limit pin would only be used in conjunction with the blend doors as a secondary means of absorbing the tension from the actuator motor.

    The Blen Dor design does NOT rely on the failed stop limit pin idea.


    For more information on the 99/04 Jeep Grand Cherokee blend door and recirculation door repairs - visit the http://blendorstore.com/

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You're reading 2001 Jeep Cherokee with a/c. I cannot find the Heat blend door and all I get is cold air out of the heat vents. Water temp at the heater hose is 190.Thanks spirit2586.

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