At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Looks like your mechanic messed up. If he has any integrity then he should take care of you. If not and you want to try and tackle it yourself then you have to ask yourself this: do I want to pull the dash out? Because that is what that will entail. Sounds like he may have messed up the ducting somehow. Unless the blend doors and directional doors are electric actuator operated in which case those actuators need to be replaced
MODE DOOR NOT SWITCHING FROM AIR TO HEAT IT'S UNDER THE DASH THERE ARE TWO 1 THAT WORKS THE VENTS ONE THAT WORKS THE DOOR FOR THE HEAT AN AIR IF VENTS CHANGE FROM DEFROST TO DASH AN TO FLOOR IT IS THE MODE DOOR actuator
Does your vehicle have manual or automatic climate control ? You system is stuck in floor an defrost mode ?
Item
Part Number
Description
1
18A318
Vacuum control motor-floor/defrost door
2
-
Defrost air flow
3
18A478
Floor/defrost door
4
18476
Heater core
5
19860
Evaporator core
6
19805
Blower motor
7
-
Outside air inlet
8
19A813
Air inlet door
9
18A318
Vacuum control motor-air inlet door
10
-
Recirculated air inlet
11
18B545
Temperature blend door
12
18A559
Panel door
13
-
Panel air flow
14
18A318
Vacuum control motor-panel door
15
-
Floor air flow
16
-
Vacuum from the engine intake manifold
17
19A563
A/C vacuum check valve
18
19A566
Vacuum reservoir tank and bracket
19
19980
EATC control
Pull the control panel an check for vacuum
Item
Part Number
Description
1
White
Air inlet door
2
Yellow
Floor/defrost door
3
Red
Floor door
4
Blue
Panel door
5
Black
Source vacuum
6
-
Not used
VACUUM APPLICATIONS CHART-ELECTRONIC AUTOMATIC TEMPERATURE CONTROL
Switch Port
Vacuum Harness Hose Color
Func- tion
Manual Override Selector Buttons
OFF
MAX A/C
NORM A/C
VENT
FLOOR
FLOOR/ DEF
DEF
1
White
Air inlet
2
Yellow
Floor/ panel (partial)
3
Red
Full floor
4
Blue
Panel
5
Black
Source
Could be the control switch itself. Or possibly the actuator that moves the door from defrost to heater. With the heater on, try switching from defrost to heat and try to hear if you can hear anything in the dash operating.
From what I hear it is a vacuum line issue. Mine is doing the exact same thing. So, I am going to get a diagram and try checking the vacuum lines to see if any are loose or tore
I go under the dash and feel the air flowing out the floor and it is coming out of the defrost, also. I noticed under the drivers side today that air is flowing and there seems to be a gap in between a part under there. There was some material stuff I saw around the edge of it that sticky brown stuff and it sometimes before came out my vents all the time. Anyways, not sure if my air is just not sealed good to blow out the vents but it is something that happened not long ago and we've not done anything under our dash area.
It sounds like the heater control panel is'nt opening the defroster door
under the dash. You need to check cables or vacuum lines under the dash to see if any came off the diaphrams or levers.
Pull the AC control in the dash and verify that there is vacuum going to it, all the different air diversion doors are operated by seperate vacuum motors controlled by the ac control head in the dash, as you switch it it sends vacuum to the correct location to work that door for the desired air outlet, dash, floor etc..
×