Question about 2006 Honda Odyssey

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Left side driver heating not working

Our 2006 Honda Odyssey heating is not working properly.

Heating works fine for the back of the car.

Heating is blowing hot air on the passanger side front but it is blowing it very weak.

Heating is blowing COLD air on the driver's side and it is blowing it strong.

Dealership has replaced some cable (not sure which) and said it is fixed but actually they did not test the fix and it was NOT fixed.

On the second visit to the dealership, they told me an interesting fairy tale:
They think animals have created a nest or blocked one of the pipes. This is causing the issue. They said it will take 8 hrs to disassable the parts clean it up and put it back together ($1000) I told them this is wrong and they should have proper expertise to diagnose the issue or look up in the known database of issues.

I am asking for help, I don't want to spend $1000 just like that

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Its possible you have an air mix control motor malfunction or a mode control motor malfunction. To retrieve your trouble codes from the heater control panel do the following. 1. turn the ignition switch on. 2. Turn the fan switch off. 3. Press the recirc control button to select fresh, then continue to hold the button until the recirc indicator comes on for 2 seconds and then goes off. If the system is okay, the recirc indicator will stay off. If there is a problem, the recirc indicator will blink a trouble code. The codes are one blink=air mix motor/circuit problem. 2 blinks=mode control motor/circuit problem. 3 blinks=evaporator temp sensor circuit problem. Mice can and do get into cars and make nests in the air conditioning systems and cause blockages so the dealer was not making up a fairy tale. That is also a possibility but you would probably smell some bad odors if that were the case.

Posted on Feb 05, 2009

  • scintln Oct 28, 2010

    where is the flapper that switches over to let the heat in !



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this car has 2 heating systems , one front and one rear. ill assume its front bad. (an option day1 )
one more option is (also not stated) is the fancy CLIMATE CONTROL , option. (got that?) im guessing yes.

this car has this (can) very complex CC system. with a thermostat
for both driver and passenger. see buttons, there?
ok ,so how does that work, (read the FSM it covers ops)
it must modulate the 3 ports (IIRC its 3) left , rear and right.
so the left valve is dead, there is a micro damper there.
if it the magic control senses (sensors) its too cold it opens this micro damper. about 3" size. and you get heat.
so it can only be 3 things, the FSM on my car is even worse.
the Control sensors lied.
the Control failed to see input or say it and failed to send open commands to the micro damper to left side.
or the micro damper is DOA>

3 possibles.
Input bad
output bad (controller is bad)
slave is bad.
just like all thing like this , same 3 rules.
the fsm should cover testing each sub part, lost the FSM>?

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