Thread: What does this mean.

If you see a book symbol on the heating and ventilation control panel, it is likely to mean blend motor issues. There are three blend motors tucked within the dash and they control the air blending and distribution (left to right and up/down).

They're not easy to access (PITA), but can be replaced with half a day and available instructions. New blend motors are around $300.

Best to diagnose whether this is the issue first off. There is plenty of info on here and on RR.net, on the subject.

Mate

This is the infamous and too often encountered "book symbol". It means there is some kind of problem with the HEVAC system

Usually blend motors or it could be a failing RL7 in the fusebox

newrremedies

"The climate control display shows a book symbol when certain faults occur, including a lack of Freon in the system, failed inside or outside air temperature sensors, failed heater matrix temp sensor (see below) and failed blend motors. "
Steve

It could be an easy reset, or it could be something a little more complex. If it appears again the next few times you go for a drive, might pay to find a friend with a Faultmate, etc, and suss it out.

I had my first book symbol recently. Plugged the Faultmate in and it was an intermittent heater core temp sensor short.

Cheers
Keithy

Originally Posted by SteveFarmer

Mate

This is the infamous and too often encountered "book symbol". It means there is some kind of problem with the HEVAC system

Usually blend motors or it could be a failing RL7 in the fusebox

newrremedies

"The climate control display shows a book symbol when certain faults occur, including a lack of Freon in the system, failed inside or outside air temperature sensors, failed heater matrix temp sensor (see below) and failed blend motors. "
Steve

Just checked it again and its not there. Is this one of the grmlins i can expect.

I'd check relay 7 first. It's a common thing.

Originally Posted by Keithy P38

I'd check relay 7 first. It's a common thing.

Ok here is where i act dumb, what is a relay 7 and more important, where is it.

Originally Posted by SteveFarmer

Mate

This is the infamous and too often encountered "book symbol". It means there is some kind of problem with the HEVAC system

Usually blend motors or it could be a failing RL7 in the fusebox

newrremedies

"The climate control display shows a book symbol when certain faults occur, including a lack of Freon in the system, failed inside or outside air temperature sensors, failed heater matrix temp sensor (see below) and failed blend motors. "
Steve

Found relay 7 and there are no signs of any faults or burning.

What i did find is that relaya 3,4 and 5 are missing. Is this important and should i get them fitted.

Originally Posted by derpomz

Ok here is where i act dumb, what is a relay 7 and more important, where is it.

Keithy

It powers the blower fans and blend motors

It is in the fusebox under the bonnet and is the one in the front on the drivers side

Steve