Thread: Blend motor doing funny things!!!

Hi RedAndy,

yep, is happening to me on a regular basis.....plug in a Faultmate and it tells me I have a short in the drivers side blend motor, hence the textbook symbol.
Maybe 3 days later, the textbook symbol is gone,......Im like you, once the money tree grows more, Im getting all blends done........but at the moment, nothing urgent.
Cheers

It is common for older units to be stuck and then move as you bump your way along a road.
Its just an indication that it is on its way out?
If you run your HEVAC on manual now that you have the problem resolved in the short term you can put off the repairs for a while.
Through test book it is possible to cycle the blend motors and test their function, this also fully opens and closes them and can clear up any logged faults.
Have you cleaned out your plenum filters(x2)?

FWIW I have similar issue and have noticed that the symbol only appears when the car is left standing and the outside temp exceeds about 15degC. Or it's been parked in the sun on a chilly day but absorbs heat because of its colour (Java black).

Confirmed this on Monday: The other night driving home from Sydney the book symbol was on and the passenger side got only cold air Stopped at Sth. Grafton about 1.00 am for about an hour for "food " ...temp outside was 4 degC.

Time to go: turned ignition key to position 2 and heard heater flaps creaking into place, book symbol had disappeared! Started engine: warm air all around, everybody HAPPY

Verdict: Not the blend motor but rather a sticking flap due to slight distortion of the plenum due to external temp, causes flaps to jam due to tight tolerances: therefore blend motor can't operate flap to fullest travel---> book symbol!

Before parting with $$$$ check flap travel

Now exploring how might get a Dremel with flex drive into said space and grind out a few thou. to free up tolerances for flap to move freely... spraying with WD40 etc only causes other issues and besides it's not great to be inhaling it in a confined space...

When you hear that creaking noise it is actually the air intake flaps that are under your intake filters. If you pull the filters out and look inside with a torch, flick ignition on/off and you will see them open and close.
They close automatically every time you shut down your ignition/stops air from getting into the cab? Not sure why you would want to do this?

Originally Posted by RR P38

When you hear that creaking noise it is actually the air intake flaps that are under your intake filters. If you pull the filters out and look inside with a torch, flick ignition on/off and you will see them open and close.
They close automatically every time you shut down your ignition/stops air from getting into the cab? Not sure why you would want to do this?

It's to preserve that Range Rover fragrance!!!!

Originally Posted by RR P38

It is common for older units to be stuck and then move as you bump your way along a road.
Its just an indication that it is on its way out?
If you run your HEVAC on manual now that you have the problem resolved in the short term you can put off the repairs for a while.
Through test book it is possible to cycle the blend motors and test their function, this also fully opens and closes them and can clear up any logged faults.
Have you cleaned out your plenum filters(x2)?

I have about a year ago. Might have to do it again. I ahve had water leak in on the passenger side, might have to get a new cover as well.

Well almost 6 months has gone by and the situation is only getting worse. The 2 blower motors have decided to slowly call it quits, so now i've got nothing. The old blend motor on the driver side is still sitting dislodged behind the instrument cluster. I have checked everything out and (without a proper diagnostic) reckon it might be the external fuse box, which is badly burned around the ( no points for guessing ) Relay 7, as the fans graduely stopped working. So a newer fuse box is on the cards. The new blend motor will be installed next week.

Originally Posted by redandy3575

Well almost 6 months has gone by and the situation is only getting worse. The 2 blower motors have decided to slowly call it quits, so now i've got nothing. The old blend motor on the driver side is still sitting dislodged behind the instrument cluster. I have checked everything out and (without a proper diagnostic) reckon it might be the external fuse box, which ihttp://www.rangerovers.net/repairdetails/electrical/fusebox.htmls badly burned around the ( no points for guessing ) Relay 7, as the fans graduely stopped working. So a newer fuse box is on the cards. The new blend motor will be installed next week.

Blend Motor Diagnosis and Replacement
Fuse Box Repairs