Inside heater problem (fan issue)

[abscate]

No flashing light, good.

The defrost mode is working correctly.

You should put a filter in the black box to protect your fan motor from dust and leaves that will enter there, but it is not the cause of your problems

It sounds like the damper controlling the air distribution is either not working or the linkage has come off. Since you not have flashing LEDs , which means the ECC is passing the self-test, I'm going to guess the linkage has fallen off. I will try to find a picture so we can find it and put it back on

I hope we can do it without removing the dash.

See diagram below. The damper motor looks like it connects directly into the linkage, so i doubt it has fallen off. I think you can remove the panel above the drivers feet and the side panel to access the motor, which is Volvo part number 9142629 ...I confirmed this in All-data, so it looks like dash removal is not needed.....whew! If you remove the panels, I would try to feel the more to see if you can feel it moving as you change the air distribution knob.

One more thing to try. Turn your ignition key on, then quickly, within three seconds, push the REC button three times. This (on the later version software) initiates a damper calibration. Wait at least a minute for this to complete, the AC LED will flash while this happening.

[Haakon]

Great write up Abscate, I really appreciate this

This calibration does`nt work om my car When the ignition is in pos 2, I wait for the heater controll lights up, I assume 1.5 seconds, then i push ON three times, but nothing happens. is there a certain way I have to set the other knobs for doing this?

I`m quite shure that the drivers side damper motor works, because I see it moves the shaft, I can also see on the passenger side that the shaft is moving, witch the drivers side damper motor is turning. on the passenger side shaft, there is no damper motor attached but, maybe it never has been either.

I have also been at the junkyard for this plastic thing that the coupefilter should be inserted in, I`ve also attached new filter.

[abscate]

THis is what Alldata tells me...

"The climate unit damper motors can be self-adjusted with this service. The damper motors are self-adjusting after any of them has been removed or replaced or other work is carried out on the damper or linkage. To activate self-adjustment, proceed as follows:
ignition ON, position I or II.
press in REC button three times within three seconds .
NOTE! The button must be pressed within three seconds of the ignition being turned on!

NOTE! The control module automatically does a self-adjustment when it is connected to the car or when it registers that power has been disconnected (e.g. battery disconnected) for more than 30 seconds .
"

You only have three seconds from the IGNITION swtich being turned on to start the self-adjustment, so dont wait for the lights to come on!

I assume the 'left hand' button is the REC button referred to in the text, but that could be wrong.

It seems like there are two versions of ECC, early and late, so we might be misconnecting on that too. Only a VADIS person can help us sort that out.

...and of course you have an EU version car and I am North America, so more things to think about.

[abscate]

I`m quite shure that the drivers side damper motor works, because I see it moves the shaft, I can also see on the passenger side that the shaft is moving, witch the drivers side damper motor is turning. on the passenger side shaft, there is no damper motor attached but, maybe it never has been either.

There are temperature dampers on the driver and passenger side which regulate temperature (they decided how much air gets deflected to the heater core)

What we are trying to check is the distribution damper which is on the driver side in the diagram above - I think on early versions of ECC there might be two distribution damper motors too.

It might be time for you to post/send some pictures of your setup.

[Haakon]

Ok, here are some pics for you:






pic above is drivers side


pic above is driverside


pic above is driverside





I hope this will help

[pcookV70]

ANY RESOLUTION TO THIS THREAD? I AM HAVING THIS EXACT SAME PROBLEM AT THIS TIME.
- 1998 V70

[Haakon]

I havent got no sollution to it yet, but I think its gotta be a block somewhere. Maybe if its not too cold tomorrow I'm going to pull out the fan and put a steel wire or something and see if it is a block near the fan. But I dont think I am so lucky, cause that would be too easy. Mine blows wery poorly trough all the wents, not nearly enough. Have you done some research on yours?

[Haakon]

I got into it today, and it was a faulty connection to the fan motor itself.. someone had been there before and placed the - on the + side and visa versa so the motor spun wrong way.. now I have good airflow trough all vents - to the windshield. I found also a damper motor who was clicking on the driver side. It was exactly like the one on the last pic abowe with markings w705. Is it the same damper motor on rh and lh side?

I have unbolted the damper motor and I wonder how to determine if its faulty. How can I do this? Hate to buy a new one if its in order, or I can fix it myself somehow. Aanyone?