MCC - stuck blend door FIXED Topic is solved

[demolite]

Hi all,

I'm a proud new owner of a 1999 V70 and also a new member. This is my first Volvo. I've been reading a lot of guides but have not come across any mentions of stuck doors in the manual hvac system. The previous owner had removed the leg-face-windscreen door motor because it stopped turning. I bought the car at this point. I found the fault, a cracked solder joint in the control unit.

The problem I'm facing, now that I'm putting the motor back, is that the upper door doesn't move correctly. Atleast I believe it doesn't. The lower door peg, which is for the leg outlets moves about 40 degrees and seems to work properly. The upper door moves about 15 degrees and gets sticky at the other end of travel.

I'm thinking its a dash out job , but any experience on this or suggestions?

Next thing I'm going to try is to borrow an endoscope from work and see what is inside.

[xHeart]

Hi all,

I'm a proud new owner of a 1999 V70 and also a new member. :D This is my first Volvo. I've been reading a lot of guides but have not come across any mentions of stuck doors in the manual hvac system. The previous owner had removed the leg-face-windscreen door motor because it stopped turning. I bought the car at this point. I found the fault, a cracked solder joint in the control unit.

The problem I'm facing, now that I'm putting the motor back, is that the upper door doesn't move correctly. Atleast I believe it doesn't. The lower door peg, which is for the leg outlets moves about 40 degrees and seems to work properly. The upper door moves about 15 degrees and gets sticky at the other end of travel.

I'm thinking its a dash out job :( , but any experience on this or suggestions?

This may help, items #12-17 works for recric function, where #12 is motor:

[demolite]

Thanks for the diagram.

I managed to get the door moving correctly. With the endoscope through the center vents I could see that the door was too high up and was actually bottoming out to the section that was supposed to be the normal upper limit. I guess running the fan with the doors disconnected from the motor had blown the door over the upper limit and into the small upper area. I managed to use the head of the endoscope to push the door back down. Installing the motor back on was a pain in the back to put it lightly.

But all done now, and works like new!

[abscate]

Two items for thread closure

You have ECC so the thread title is a bit confusing - that's why its good to make your own thread on a problem



The 1999 had a mid year VIN change on the direction motor so be careful and match part numbers to vin when serving this year