Question about 2001 Jeep Cherokee

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Cruise control complete failure

Cruise control light will not come on at all and cruise control will not function. heat blend door and vent control function fine tho.

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Most of these cars have a switch that is activated by your touching the brake pedal to turn off the cruise when you brake. Usually that is a small plastic switch, hidden up under the dashboard, that will "open" when you press the brake. ( A little plunger will come out of the switch). These switches often break or fall out of their holder, being really cheaply made. Be blessed.

Posted on Jan 01, 2014


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Posted on Jan 02, 2017

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SOURCE: air or heat only comes out defroster. vacuum lines

If its manual lever that you have,then check the cable behind the unit with your temp controls.chances are it came off,or came loose under the dash.If its all push button vacuum operated,then its a air leak in the lines somewhere,or it very well can be a bad switch.

Posted on Jul 29, 2009

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SOURCE: 1999 Jeep GC Ltd - cruise control will not engage

take to auto sparky-sounds like solenoid

Posted on Sep 15, 2009

  • 6982 Answers

SOURCE: Blend door functions, why no heat? exactly where is heat core?

First, there are two doors inside the heater. one door changes air flow between heat and A/c, the other changes where air is going (vent, floor, defrost etc). You did not mention if when you moved the door by hand, if you got heat when you did that, or, if the motor you removed had vacuum going to it and if it was functioning when you moved the dash control. Next, you don't need to cut holes in the box to check the core. If the hoses going to and from the core are getting hot, likely you have flow going through it. You can do a temporary visual check by replacing one hose with a clear plastic one and observing flow. (don't leave plastic in place as it will get soft when hot and will eventually fail.). You either have a vacuum problem not allowing blend doors to move, a second door that is jammed, an obstruction, internal or external (leaves, mouse nest etc) of the heater core.
If yours has a heater control valve that is installed on the heater hoses, check that as well (failure default is usually full on which will normally give you heat, but they can stick in the wrong position as well).
Last, I know removing the box is a real pain. Generally though, in the end you will need to remove it if the core needs changing. I'd first attempt to flush the core, independently of the system by removing both hoses at the engine and draining the core, then filling it with flush, waiting a half hour or so and then blowing it out both ways with a garden hose.

Posted on Nov 09, 2009

  • 1 Answer

SOURCE: blend door actuator needs replacing does the

no it doesnt ... check out if you have to replace the blend doors .... but the actuator is directly behind the glove box...remove the glove box take out 3 screws and remove actuator and replace.....waa laa

Posted on Nov 25, 2009

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My 03 h2 has no heat. I get cool air blowing out the vents. My defrost rear vents same thing. Then today all of a sudden,air stopped blowing thru the drv side but all other vents remained the same.

This is most likely due a failure of a part called the air temperature control blend door actuator motor and that is often caused by a sticking blend door that the motor drive operates that has become warped from the heat of the air on heat mode. The dash must come out to repair these parts.

May 03, 2017 | Cars & Trucks

2 Answers

Side windows on passenger side fog up. Not on driver's side, only on passenger.

so find out which vent is dead,?
before 5 gallon LYSOL flush an a week long GAG !
make sure first never to use RECRIC, when wanting to defog.
and is the A/C running in dash defrost mode (compressor main shaft spins)

if a vent is dead, its a bad damper valve, (not saying a part, a function)
the book is free, you can read it, HVAC. see venting and dampers.
its very simple in concept, a fan, a damper and dry air. hot.
the heater core makes heat the non recirc, damage gives you fresh air, the A/C makes that air dry. and the dampers the supply all vents work work.
so make sure the controls are set right,
then see if the upper vents all blow, with hand waved on them.
see? that is easy, and not reporting a dead vent ,makes help harder.
the FSM is on line, ill look for you.
but first HVAC 101
  1. does blower work on high?
  2. does the recirc turn to fresh are,and you get fresh air with blower off moving, at all top vents. y/n
  3. do you have full heat? 180F + engine heat (scan tool shows this as ECT)
  4. do all vents top work , blower on?
  5. is the A/C compressor working in A/c mode (cold) and Defrost?
  6. more... below.
Rule one, dont work in dash until air bags are DEFEATED (injury) (pull battery neg lug, and wait 1hour)

got fsm page open, ill state some facts needed to fix this.

first ill prove the dash system does not need total dismantle
for all jobs. Does NOT.
Air /mix blend door
Single Zone/Dual Zone Driver's Side(FSM)
  1. Disconnect and isolate the negative battery cable.
  2. Remove the instrument panel silencer from the driver side of the instrument panel.
  3. Remove the three screws that secure the blend door actuator to the driver side of the HVAC air distribution housing .
  4. Remove the blend door actuator from the air distribution housing and disconnect the HVAC wire harness connector from the actuator.
  5. Remove the blend door actuator from the vehicle.

next page, is blend door 2, type.
has vacuum servos.
we move the controls and make sure all servo vacuum motors

this car has driver side and passenger side seperate blend doors.
so,,, we are getting close here>
if the defroster fails,(seems not) then that is electric motor drive
and very hard to test . (if not door jam)

in any case, we need to know what part is failing,
if the passenger blend is dead.
seen below,
we then must find out why
1: just stuck.
2: servo actuator failure
3: controls to #2 above bad, or connections to each.

login to see HVAC chapter, read how it works and the tests.

Feb 11, 2015 | 2001 Jeep Grand Cherokee

1 Answer

98 Stratus - Access to vent temperature cable and vent door/flapper ?

Sorry but the system doesn't use cables, it is all motorized and this is a common issue on all older cars. You will need to remove the dash assembly and check the temperature control door (also known as the "blend door). In all cases the door must be checked for freedom of movement, the blend door binding destroys the tiny DC stepper motor that moves the door and in may cases the shaft snaps off. See picture of blend door motor below. dc2433d7-cbf5-43b9-b143-769d332ec8b0.jpg

Mar 20, 2014 | 1998 Dodge Stratus

1 Answer

My 2005 2500 HD Duramax is not getting any heat inside cab. Engine is not running hot and coolant level is fine. Turned the heater controls up and down fast today and ot some heat for a while.

The temperature of the air coming out of the ducts is controlled by a door that moves between the heater core and the AC core, it is called the "blend" door for obvious reasons as it blends the hot and cold air streams to give the desired air temperature at the dash vents. The door is controlled by a small gear drive DC motor called the blend door actuator, what happens in most case is the actuator is damaged by a blend door that is warped from heat being hard to move or not moving at all which is the case with your truck. The blend door and its actuator should be replaced as one repair, the dash must be removed from the truck to access the air ducting that contains the blend door, you absolutely need a service manual to complete this job, it takes about 10 hours.

Feb 09, 2012 | 2006 Chevrolet Silverado 2500HD 2WD

1 Answer

1998 ford expedition 4.6 liter - when air is turned on hot air blows out , compressor is working. could it be a vent malfunction? all vents work off of vacum except for one that has a motor that turns...

Sounds like it could be the blend door motor that has failed or the blend door itself is stuck or broken. If you have manual A/C controls it could also be the potentiometer(the switch that controls the heat) or if you have EATC it might be the complete head unit that needs to be replaced. More than likely it is the blend door motor that needs replacing so that would be where I'd start testing first.

Apr 07, 2011 | 1998 Ford Expedition

1 Answer

Where are the trap doors for heating & air conditioning for a 1995 olds cutlass ? I am told that is my problem to my no heat situtaion.I had heat before, I did have to change the heater core &...

Most GM vehicles uses a vacuum to control the hot/cold blend door selector on the AC/Heat. The vacuum line is usually tied to the cruise control .

One thing to check is test your cruise control to see if it still works or not.

I've fixed many ac/heat blend doors by tracing the vacuum hoses and found it to be detached or broken and connected them back and works

Dec 03, 2010 | 1995 Oldsmobile Cutlass Supreme

1 Answer

I think I have a blend door problem just not sure how to fix it. I get heat from my mid and lower vents on the drivers side but it blows cool on passenger side and defrost both sides. Magically the next...

this unit is eclectric, it uses actuator motors to control the blend doors and selector doors, you are correct its a blend door problem, if you look under the dash on the passengerside there will be a motor mid way, thats the blend door actuator and theres another on the driverside. you what pass/side. move your controls to pin point the right one,hope this helps.

Sep 21, 2010 | 2006 Dodge Ram 1500

1 Answer

My heater will only blow hot air out of the rear vents from the rear controls. The front vents only blow cold air. Is there a simple fix?

blend door or temp contrl switch is bad.

Section 12-02: Heating and Defrosting 1998 Windstar Workshop Manual
REMOVAL AND INSTALLATION Actuator Motors, Electric Temperature Blend Door
  1. Remove cassette storage box or center shelf unit, if equipped.
  1. Remove instrument panel ash receptacle (04810) by depressing service lever.
  1. Disconnect electrical harness connector from electric blend door actuator.


  1. Remove three retaining screws.


  1. Carefully pull electric blend door actuator outward and off A/C evaporator housing (19850) assembly.
  1. Follow removal procedure in reverse order.
  1. Air temperature control door shaft is keyed. Move door to properly insert electronic actuator shaft. Make sure the shaft is completely in and properly seated.

Jan 14, 2010 | Ford Windstar Cars & Trucks

1 Answer

2002 vue early production 4 cyl. Heating/AC vents - no output

Hi there, Sounds like a vent door switch. It's in your dash and it controls the vent door opening and closing and to which duct the air goes to, defrost, face vents, floor. Best thing to do is buy a Haynes or Clinton's repair shop manual at your local AP store for your particular vehicle. Then read up on it in the trouble shooting section or the step by step RR section. You can purchase these at your local Auto Parts store or buy them on line at ebay burdfrenzy

Oct 17, 2009 | 2002 Saturn VUE

2 Answers

2004 Ford Expedition rear floor cool/heat

Item Part Number Description 1 — Air inlet door 2 — Temperature blend door 3 — Headliner airflow 4 — Auxiliary mode door 5 — Floor airflow 6 18476 Heater core 7 19860 Evaporator core 8 19805 Blower motor
The auxiliary A/C and heating system has the following features:
  • The auxiliary A/C and heating system is functional whenever the instrument panel mounted A/C control is in any position except OFF.
  • The auxiliary blower motor recirculates the air inside the vehicle. Outside air is not available to the auxiliary system.
  • Air is cooled and dehumidified by the auxiliary A/C evaporator core only if the instrument panel mounted A/C control is adjusted to a position that requires A/C compressor operation.
  • The temperature blend door and the auxiliary mode door are controlled by electric actuator motors.
  • Movement of the auxiliary temperature control between COOL and WARM causes a corresponding movement of the temperature blend door to mix air flowing through and around the auxiliary heater core.
  • Movement of the auxiliary mode control between PANEL and FLOOR causes a corresponding movement of the auxiliary mode door to direct air flow between the panel (headliner) registers and the floor duct.
I would say the auxiliary mode door (#4) electric motor is not wokring.

Auxiliary Blend Door Actuator —Air Distribution Removal and Installation
  1. Remove the RH quarter trim panel cup holder and access panel.
  1. Remove the screws.
  1. Disconnect the blend door actuator electrical connector.
  1. To install, reverse the removal procedure.

Jan 14, 2009 | 2004 Ford Expedition

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