Blend Motors Not Blending!!

fortgrange · Oct 1, 2013

Typical, first sign of single digit temps and the blend motors throw a hissy fit!!

Can someone enlighten me on exactly what is happening in the bowels of the dashboard under the following conditions.

Driving along on low both sides most of summer no problem. As colder temps have come along moving up to high has had no effect on drivers side (passenger side fine). I could drive to the moon and back with it set to high and it will chuck out cold air. But if you leave it on high and turn the engine off, when you restart it will shoot up to high and burn your butt off. If you then adjust back to cold it will go down no problem but will not increase until you go through the stop start routine again.

Is this some kind of calibration going on when you start up or is it just that blend motor heading south, or the actual hevac unit starting to play up.

Many thanks.

Saint.V8 · Oct 1, 2013

Yep, during start up, the motors can cycle themselves, if at the extremes of travel they stick, they will fault and stay there....do you have the Book symbol onm the display??

fortgrange · Oct 1, 2013

Saint.V8 said:
Yep, during start up, the motors can cycle themselves, if at the extremes of travel they stick, they will fault and stay there....do you have the Book symbol onm the display??

Symbol comes on as soon as you try to take the temp up.

Extremes of travel I can understand. But after the stop start routine and the sauna becomes too much on high, you can take it down to 22 degrees fine and it will stop there, but as soon as you go back up to say 25 degrees book symbol comes on and it won't budge off 22 although it's showing 25 or whatever.

Datatek · Oct 2, 2013

fortgrange said:
Symbol comes on as soon as you try to take the temp up.

Extremes of travel I can understand. But after the stop start routine and the sauna becomes too much on high, you can take it down to 22 degrees fine and it will stop there, but as soon as you go back up to say 25 degrees book symbol comes on and it won't budge off 22 although it's showing 25 or whatever.

Sounds like the flap is sticking, is this the fault that eightinavee's self tapping screw fixes?

wammers · Oct 2, 2013

Datatek said:
Sounds like the flap is sticking, is this the fault that eightinavee's self tapping screw fixes?

This is a blend flap malfunction Keith. The self tapper is for the distribution flaps. That motor drives two full width flaps via the distribution quadrant. The front flap very rarely tightens but the quadrant pivot and the back flap do. The blends are two separate flaps one for each side and are much easier to drive. They very rarely if ever stick. Sounds more to me like one side of the pot is duff or the solder joint has broken away.

Datatek · Oct 2, 2013

wammers said:
This is a blend flap malfunction Keith. The self tapper is for the distribution flaps. That motor drives two full width flaps via the distribution quadrant. The front flap very rarely tightens but the quadrant pivot and the back flap do. The blends are two separate flaps one for each side and are much easier to drive. They very rarely if ever stick. Sounds more to me like one side of the pot is duff or the solder joint has broken away.

Fair enough, never had the pleasure of failed blend motors yet

sandyt · Oct 2, 2013

Datatek said:
Fair enough, never had the pleasure of failed blend motors yet

Your time will come - hope not for a long while though

fortgrange · Oct 2, 2013

So reading between the lines the blend motors have to be replaced again!! This will be the 3rd set on this motor. The ones that it left the factory with, they were changed again at 35000 miles and I've just ticked over 64000 and they need sorting again.

Land Rover (or whoever makes these blend motors) build quality shines through again.

sandyt · Oct 2, 2013

Put it on diagnostics first it will give an indication of where the problem lies

Datatek · Oct 2, 2013

fortgrange said:
So reading between the lines the blend motors have to be replaced again!! This will be the 3rd set on this motor. The ones that it left the factory with, they were changed again at 35000 miles and I've just ticked over 64000 and they need sorting again.

Land Rover (or whoever makes these blend motors) build quality shines through again.

Valeo, and the same parts seem to be used in other cars.

Druim · Oct 2, 2013

Datatek said:
Valeo, and the same parts seem to be used in other cars.

Some says there a two qualities: Range Rover P38 Maintenance repair improvements and tips learned by experience by ownership.

Datatek · Oct 2, 2013

Druim said:
Some says there a two qualities: Range Rover P38 Maintenance repair improvements and tips learned by experience by ownership.

If there are, then for sure LR would have used the low quality versions.

Druim · Oct 2, 2013

Datatek said:
If there are, then for sure LR would have used the low quality versions.

Yep, what the Swede says

Blend Motors Not Blending!!

fortgrange

Active Member

Saint.V8

Dyed-in-the-wool 100% RR Junkie

fortgrange

Active Member

Datatek

Well-Known Member

wammers

No longer with us, RIP

Datatek

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sandyt

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fortgrange

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sandyt

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Datatek

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Druim

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Datatek

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Druim

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