Floorboard heat does not work. - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Liberty Forums > KK Liberty Forum > Floorboard heat does not work.

The Cure for your Tie Rod Roll!Steering and more from Ruffstuff!Introducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Reply
Unread 01-18-2014, 12:32 PM   #1
donniesoup
Registered User
1980 FSJ Cherokee 
 
Join Date: Jun 2011
Location: brighton, mi
Posts: 6
Floorboard heat does not work.

The heater will not blow out of the floorboards. Instead it blows out of the defrost. When on defrost it blows out of defrost. Has anyone had this problem? Is this a vacuum issue? Can anyone tell me how to fix this? Thank you.

__________________
2011 liberty 70th anniversary
1980 cherokee

Do what you should now so you can do what you want too later!
donniesoup is offline   Reply With Quote Quick reply to this message
Unread 01-18-2014, 12:46 PM   #2
Bmxer524
Registered User
2011 KK Liberty 
 
Join Date: Aug 2011
Location: Lindenhurst, NY
Posts: 1,509
Mine does it. They told me it's "normal"....hate dealers. If you set it between the floor and floor/top vents, it should work pretty normally...
__________________
2011 KK - Skyslider - JBA Adjust-A-Strut - OME 731 - Bilstein Shocks - JBA UCA- 245/75-16 Duratracs
Bmxer524 is offline   Reply With Quote Quick reply to this message
Unread 01-18-2014, 04:13 PM   #3
donniesoup
Registered User
1980 FSJ Cherokee 
 
Join Date: Jun 2011
Location: brighton, mi
Posts: 6
I've tried that too. Doesn't work. I would take it to dealer but out of warranty. Have 84k on it.
__________________
2011 liberty 70th anniversary
1980 cherokee

Do what you should now so you can do what you want too later!
donniesoup is offline   Reply With Quote Quick reply to this message
Unread 01-18-2014, 10:17 PM   #4
Bmxer524
Registered User
2011 KK Liberty 
 
Join Date: Aug 2011
Location: Lindenhurst, NY
Posts: 1,509
Wow really racking up the miles lol. If you find a fix or what's wrong let me know!
__________________
2011 KK - Skyslider - JBA Adjust-A-Strut - OME 731 - Bilstein Shocks - JBA UCA- 245/75-16 Duratracs
Bmxer524 is offline   Reply With Quote Quick reply to this message
Unread 01-20-2014, 12:44 PM   #5
LibertyRS
Registered User
2012 KK Liberty 
 
Join Date: Dec 2011
Location: Birmingham, MI
Posts: 300
Same issues on my 2012 with 37xxx, haven't had time to deal with it. Big boots and wool socks
__________________
2012 Jeep KK
Stormtrooped
ZZzz
LibertyRS is offline   Reply With Quote Quick reply to this message
Unread 01-30-2014, 10:00 AM   #6
JeepCares
FCA Customer Care
 
JeepCares's Avatar
 
Join Date: Jan 2012
Location: MOPAR World Headquarters
Posts: 3,613
Info from the 2011 KK FSM:

24 - Heating and Air Conditioning/Controls/ACTUATOR, Blend Door/Description
DESCRIPTION


The heating-A/C system uses a reversible, 12-volt direct current (DC) servo motor which mechanically positions the blend-air door. The blend door actuator (1) is located on the driver side of the HVAC housing.

The blend door actuator is interchangeable with the actuators for the mode-air doors and the recirculation-air door. Each actuator is contained within a black molded plastic housing with an integral wire connector receptacle (2) and integral mounting tabs (3) that allow the actuator to be secured to the HVAC housing. The blend door actuator output shaft (4) is connected to the linkage that drives the blend-air door. The blend door actuator does not require mechanical indexing to the blend-air door, as it is electronically calibrated by the A/C-heater control.

24 - Heating and Air Conditioning/Controls/ACTUATOR, Blend Door/Operation
OPERATION

The blend door actuator is connected to the A/C-heater control through the vehicle electrical system by a dedicated two-wire lead and connector of the HVAC wire harness. The blend door actuator can move the blend-air door in two directions. When the A/C-heater control pulls the voltage on one side of the motor connection high and the other connection low, the blend-air door will move in one direction. When the A/C-heater control reverses the polarity of the voltage to the motor, the blend-air door moves in the opposite direction. When the A/C-heater control makes the voltage to both connections high or both connections low, the blend-air door stops and will not move.

The A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the blend door actuator and the blend-air door. The A/C-heater control learns the blend-air door stop positions during the actuator calibration procedure and will store a Diagnostic Trouble Code (DTC) for any problems it detects in the blend door actuator circuits (Refer to 28 - DTC-Based Diagnostics/HVAC - Diagnosis and Testing) .

The blend door actuator cannot be adjusted or repaired and must be replaced if inoperative or damaged.

24 - Heating and Air Conditioning/Controls/ACTUATOR, Mode Door/Description
DESCRIPTION


The heating-A/C system uses a reversible, 12-volt direct current (DC) servo motor which mechanically positions the mode-air door. The mode door actuator (1) is located on the driver side of the HVAC housing.

The mode door actuator is interchangeable with the actuators for the blend-air door and the recirculation-air door. Each actuator is contained within a black molded plastic housing with an integral wire connector receptacle (2) and integral mounting tabs (3) that allow the actuator to be secured to the HVAC housing. The mode door actuator output shaft (4) is connected to the linkage that drives the mode-air door. The mode door actuator does not require mechanical indexing to the mode-air doors, as it is electronically calibrated by the A/C-heater control.

24 - Heating and Air Conditioning/Controls/ACTUATOR, Mode Door/Operation
OPERATION

The mode door actuator is connected to the A/C-heater control through the vehicle electrical system by a dedicated two-wire lead and connector of the HVAC wire harness. The mode door actuator can move the floor, defrost/demist and the panel-air doors in two directions. When the A/C-heater control pulls the voltage on one side of the motor connection high and the other connection low, the mode-air doors will move in one direction. When the A/C-heater control reverses the polarity of the voltage to the motor, the mode-air doors moves in the opposite direction. When the A/C-heater control makes the voltage to both connections high or both connections low, the mode-air doors stop and will not move.

The A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the mode door actuator and the mode-air doors. The A/C-heater control learns the mode-air doors stop position during the actuator calibration procedure and will store a diagnostic trouble code (DTC) for any problems it detects in the mode door actuator circuits (Refer to 28 - DTC-Based Diagnostics/HVAC - Diagnosis and Testing) .

The mode door actuator cannot be adjusted or repaired and must be replaced if inoperative or damaged.

24 - Heating and Air Conditioning/Operation (See attached picture)
OPERATION

Both the manual temperature control (MTC) and the automatic temperature controlled (ATC) heating-A/C systems are blend-air type systems. In a blend-air system, a blend-air door controls the amount of conditioned air that is allowed to flow through, or around the heater core. This design allows almost immediate control of output air temperature.

NOTE: Typical blend-air type HVAC system shown.

The heating-A/C system pulls outside (ambient) air through the fresh air intake (4) located at the cowl panel at the base of the windshield and into the air inlet housing above the heating, ventilation and air conditioning (HVAC) housing and passes through the A/C evaporator (7). Air flow is then directed either through or around the heater core (2). This is done by adjusting the position of the blend-air door (3) with the temperature control located on the A/C-heater control in the instrument panel. Air flow is then directed out the floor outlet (8), instrument panel outlet (10) or the defroster outlet (1) in various combinations by adjusting the position of the mode-air doors (9 and 11) using the mode control located on the A/C-heater control. The temperature and mode control uses electrical actuators to operate the air doors.

The velocity of the air flow out of the outlets can be adjusted with the blower speed control located on the A/C-heater control.

The fresh air intake can be shut off by pressing the Recirculation button on the A/C-heater control. This will operate the electrically actuated recirculation-air door (5), which closes off the fresh air intake. With the fresh air intake closed, the conditioned air within the vehicle is pulled back into the HVAC housing through the recirculation air intake (6).

The A/C compressor can be engaged by pressing the A/C (snowflake) button on the A/C-heater control when the mode control is set in any floor to instrument panel position. The A/C compressor will automatically engage when the mode control is set in any Mix to Defrost position. This is done to help reduce fogging of the front windows by removing humidity from the conditioned air prior to it coming into contact with the windows.

The defroster outlet receives airflow from the HVAC housing through the molded plastic defroster duct. The airflow from the defroster outlet is directed by fixed vanes in the defroster outlet grille and cannot be adjusted.

The side window demister outlets receive airflow from the HVAC housing through the defroster duct and molded plastic demister ducts which are integral to the instrument panel. The airflow from the side window demister outlets is directed by fixed vanes in the demister outlet grilles and cannot be adjusted. The demisters direct air from the HVAC housing through the outlets located on the top corners of the instrument panel. The demisters operate when the mode control is positioned in the floor-defrost and defrost-only settings. Some air may be noticeable from the demister outlets when the mode control is in the bi-level to floor positions.

The panel outlets receive airflow from the HVAC housing through the center panel duct and the two molded plastic panel ducts, which are integral to the instrument panel. The two end ducts direct airflow to the left and right instrument panel outlets, while the center panel duct directs airflow to the two center panel outlets. Each of these outlets can be individually adjusted to direct the flow of air.

The floor outlets receive airflow from the HVAC housing through the floor distribution ducts. The front floor outlets are integral to the molded plastic floor ducts, which are secured to the sides of the HVAC housing. The floor outlets cannot be adjusted.

NOTE: It is important to keep the air intake opening clear of debris. Leaf particles and other debris that is small enough to pass through the cowl opening screen can accumulate within the HVAC housing. The closed, warm, damp and dark environment created within the housing is ideal for the growth of certain molds, mildews and other fungi. Any accumulation of decaying plant matter provides an additional food source for fungal spores, which enter the housing with the fresh intake-air. Excess debris, as well as objectionable odors created by decaying plant matter and growing fungi can be discharged into the passenger compartment during heater-A/C operation if the air intake opening is not kept clear of debris.

This A/C system uses an A/C expansion valve to meter the flow of refrigerant to the A/C evaporator. The A/C evaporator cools and dehumidifies the incoming air prior to blending it with the heated air. To maintain minimum evaporator temperatures and prevent evaporator freezing, an evaporator temperature sensor is used. The sensor is located downstream of the evaporator and supplies an evaporator temperature signal to the A/C-heater control.
typical-blend-air.jpg

__________________
Ryan
Jeep Social Care Specialist
JeepCares is offline   Reply With Quote Quick reply to this message
Unread 02-05-2014, 07:53 PM   #7
NAMoulton
Registered User
2010 KK Liberty 
 
Join Date: Dec 2013
Location: Harrisonburg, VA
Posts: 512
I have this issue sometimes too. I go from defrost to feet all the time and I have to turn the fans off, then change the flow direction, then turn it back on in order for it to change flow directions. I think it's because the motor mechanism thingy is too weak for the air flow.
NAMoulton is offline   Reply With Quote Quick reply to this message
Unread 11-18-2014, 02:15 PM   #8
captpetey
Registered User
2009 KK Liberty 
 
Join Date: Jan 2013
Location: ortonville, mi
Posts: 9
driver's side blend door

Does anyone know how to move/replace the driver's side blend door? The diagram that JeepCares posted is great, but i'm not sure where to go from there. I have hot air on all passenger side vents, but only cold air on my side. All the directional/mode doors are working properly, but the temp is split domn the middle. my wife doesn't care, she's warm, but my side is freezing!
captpetey is offline   Reply With Quote Quick reply to this message
Unread 11-19-2014, 09:41 AM   #9
lfhoward
Registered User
2008 KK Liberty 
 
Join Date: Nov 2012
Location: Morrisville, PA
Posts: 765
I just found this thread over on LOST about HVAC issues like you are describing. It has some solutions. http://www.lostjeeps.com/forum/phpBB...p?f=88&t=76917
__________________
2008 Liberty Sport 4x4 Automatic
lfhoward is offline   Reply With Quote Quick reply to this message
Unread 11-27-2014, 08:26 PM   #10
s2killa
Registered User
2011 KK Liberty 
 
Join Date: Nov 2013
Location: Morris County, NJ
Posts: 96
glad I read this that I was the only one going crazy
__________________
Instagram-DHR_S2KILLAA
11 Liberty KK l Daystar 2" l Rock Crawler 15x8 3.75" l M/T Baja MTZ 31x10.50
s2killa is offline   Reply With Quote Quick reply to this message
Unread 12-02-2014, 11:36 AM   #11
captpetey
Registered User
2009 KK Liberty 
 
Join Date: Jan 2013
Location: ortonville, mi
Posts: 9
So, after reading the links here and on the Nitro Forum, I cleaned/flushed the heater core... and I am willing to claim at least a temporary VICTORY. The driver's side still is not as hot as the passengers, but I don't think it ever was or ever will be. It is plenty warm for me, and more importantly the defroster works so I can see out the front at 6am to get to work. I have read that the issue often does return, but it only takes about 1/2 hour to clean out, so that's a lot better than taking the whole dash apart!
captpetey is offline   Reply With Quote Quick reply to this message
Unread 01-14-2015, 09:01 AM   #12
Peteroo
Registered User
 
Join Date: Oct 2010
Location: Milwaukee
Posts: 44
Just heard from my dealership that this is my problem...also not covered on my extended warranty..fml. time to crawl under and see what i can do
Peteroo is offline   Reply With Quote Quick reply to this message
Unread 01-14-2015, 03:06 PM   #13
rescue575
Registered User
2011 KK Liberty 
 
Join Date: Feb 2012
Location: Franklin Square, NY
Posts: 1,078
Quote:
Originally Posted by Peteroo
Just heard from my dealership that this is my problem...also not covered on my extended warranty..fml. time to crawl under and see what i can do
What warranty did you get?
__________________
2011 Liberty Sport
2 KC Slimlite[RIGHT] 130 Watt Long Range on JK Bar
TMS Aluminum Roof Rack Cross Bars
Cobra 75, Firestik Door Jam Mount, HD Spring, 2Ft Firestik
Dunlop Fierce Attitude M/T
rescue575 is offline   Reply With Quote Quick reply to this message
Unread 01-15-2015, 11:03 AM   #14
Peteroo
Registered User
 
Join Date: Oct 2010
Location: Milwaukee
Posts: 44
It was a crappy "added care plus" that was put on when i complained about a vibration. Looking into new vehicle and diy fix for this
Peteroo is offline   Reply With Quote Quick reply to this message
Unread 02-15-2015, 07:30 AM   #15
Tiga
Registered User
2011 KK Liberty 
 
Join Date: Aug 2014
Location: Pittsburgh, PA
Posts: 22
Has anyone had their blend door actuator replaced by the dealer to fix this issue? I have the same problem - the heat works fine but I can not get it to direct to the floor. It's either window defrost or cabin vents. My understanding is their is a calibration process that needs to be followed once the actuator is replaced. If anyone had this done did it fix your issue and what did the dealer charge you? Thanks!!
Tiga

Last edited by Tiga; 02-17-2015 at 09:07 AM..
Tiga is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.