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Heater damper on floor setting doesnt work - Cars & Trucks

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Blend door is probally not closeing up,

Posted on Nov 29, 2012

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No heat to floor


Hi there, please check that the damper is changing position, try moving the knob from defrost to front panel and vice versa; then try to floor; feel the air coming out. If no change or air in just one position, no vacuum from the engine; check the vacuum distributor hoses close to the Brake Booster in th engine compartment, may be the hose to the AC Heater is not properly hock up or damage. The blend door actuator or control is not working; there are several videos how to replace the actuator from the radio compartment in you tube. The cost should be around $35-$50 in an auto store. Good look, take care.

Mar 08, 2015 | 2000 Ford Windstar

1 Answer

Heater blows hot air only out of front vents, not floor or defrost when I switch to those zones


the dampers are failing.
first check fuses.... as always.....
ok some cars have cable dampers others use elect. motor dampers
the FSM covers the tests, on this. electric is hardest.
if cable drive, just look are they working>? simple it is.
the cable most move on both ends, is it? and still connected>?

Dec 10, 2013 | 1998 Toyota Camry

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Air conditioner


sure.

what is your goal hot air, you never said,

got full fan speed? on high>? sure.
got full engine coolant heat 180F or more holding??? if not all is lost.
if car has a heater core water valve is it open>?
are the 2 heater core water tubes both fully hot,(hand test)
yes> good.
now you need air flow through the core (heater)
that means the damper most be open,, is it?

in that order. (heat)
the dampers on hondas can be complex. (10x on electric damper motors , aka, damper actuators)
see part 5 and 6 here
http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&catcgry1=ACCORD&catcgry2=2002&catcgry3=2DR+EX&catcgry4=KA4AT&catcgry5=HEATER+UNIT

the fSM covers the complex tests of dampers, and not having
a real FSM makes this near impossible.
why , because your dampers are no like anyothers on earth.
other cars use different types. and are all unique .
unlike CABLES
unlike vacuum servos.
see>?

here are the basics for heat.
http://www.fixkick.com/AirCond/heater.html


Jun 04, 2013 | 2002 Honda Accord

1 Answer

How to manually open the dampers


I have a 91 deville that never had a working heater. I fixed the prob by unhooking the actuator, or blend door motor. Now i have defroster, and heat comming from floor, but no vents. The actuator is behind the trap door in glove box, its a black box with a rod connecting to the blend door. After unhooking, make sure the blendoor is all the way to the right, i wired my in that position. Heater works good, and have had no probs. Hope this helps

Mar 23, 2013 | 1996 Cadillac DeVille

2 Answers

No heat on the floor, only vents and defrost work. Why?


There should be a heater motor relay in the fuse box of the engine compartment. It is most likely blown out or needs cleaning. Check it, replace it and you should see it working again.

Jan 13, 2011 | 1997 Volvo 850

1 Answer

The heater air comes out the vents, and defroster only. it doesnt come out the floor under the dashboard


Your heater directional swicthes work of vacum look under dash when set to floor see if you can hear a hissing sound if so the vacum line is unattached or broke they are usally small hard plastic.

Jan 04, 2011 | Ford Expedition Cars & Trucks

1 Answer

How to replace the heater core of a volvos40 with a 2.5 engine


Volvo Cars 1999-05 - S40 And V40 Models
Heater Core - Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions Section.
  2. In the engine compartment:
    1. Remove the top splashguard.
    2. Install two hose clips on the hoses to the heat exchanger. Remove the hoses.
    3. Remove the air conditioning pipe in the engine compartment from the support.
  3. In the passenger compartment:
    1. Disconnect the wiring and the connectors located on the center support.
    2. Remove the mounting bolts from the center support. Remove the support.
    3. Remove the control panel.
    4. Disconnect all the connectors.
    5. Remove the power unit
  4. Cars with air conditioning remove the air conditioning pipe in the engine compartment from the support.
  5. Remove the bolts and the nut from the power unit. Pull the power unit backwards as far as possible
  6. Remove the upper section from the housing.
  7. Remove the section that connects with the floor heater.

    8c8e8aa.jpg
    Fig. Heater unit-S40, V40

Heater unit-S40, V40
  1. Press the pipes down. Remove the lower section.
  2. Remove the four mounting bolts.
  3. Pull off the housing. Press the floor heater down. Remove the housing.
  4. Remove the control lever on the valve side.
  5. Remove the mounting and the clips around it.
  6. Carefully separate the components.
  7. Replace damaged components if necessary.
    NOTE Do not disassemble damper motors when adjusting.
  8. Replace the refrigerant temperature sensor.
  9. Replace the heat exchanger.
  10. Check the seals (also on the dampers).
  11. Install the control mechanism last.
  12. Install in reverse order.
  13. Check the setting of the damper motors.

Hope this help (remember comment and rated this).

Jul 27, 2010 | 2000 Volvo S40

1 Answer

2000 S-10 no heat from the heater


there is a cable linking the controls on your dash with the damper under your dash on the passeanger side, u may be able to trace it visually to the damper to check its operation, when u found the lever it connects to, try to operate it from there and recheck. The temp. of the air coming out of your vent is influenced by your coolant temp, so check that you are getting to proper coolant temp. and verify that the heater hoses going into the firewall in the engine compartment are both hot when u have the heat on, engine running to check for proper circulation through your heater core.

Jan 09, 2009 | 2001 Chevrolet S-10

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