Aux heat, do i have it ??

[tj196443]

AUX Heating ! do I have it or not, that is the question !
Hi All
I have a late 2009 RR Vogue with the TFT screen and touch screen console display, the photo I have posted shows the menu I have for the timed climate control. When I set the timer sometimes and only sometimes the auto button

will flash for a few seconds and the fan will blow for a few seconds and then shut off. I'm only guessing I have aux heating because I have the menu on the touch screen, I dont have the fob but definitely have the receiver in the boot. I have tried taking the 5amp fuse out of the rear fuse box but this has made no difference,,, any ideas ??

 

[donp38]

Petrol or Diesel Engine?
Std on Diesel.
Expensive option on petrol I believe...

 

[tj196443]

Petrol or Diesel Engine?
Std on Diesel.
Expensive option on petrol I believe...

Thanks for the reply donp38, it's a diesel V8 3.6. First Range Rover I've owned and the timed climate has me baffled, tried a few times to get it to work but no joy. Living up North the heat function would be nice I must admit.

 

[stella man]

Hello
tj196443 Yes you have timed climate when you set timer time to come on, unit will only come on if 16c or below,
I'm also new on here with 1st RR and this is what my manual states,tried mine when it was 15c outside it came on but no heat so another thing to look at

 

[gold rover]

Hello
tj196443 Yes you have timed climate when you set timer time to come on, unit will only come on if 16c or below,
I'm also new on here with 1st RR and this is what my manual states,tried mine when it was 15c outside it came on but no heat so another thing to look at

I could be wrong here, so will call in @Saint.V8 or @holidaychicken but 15c seems rather balmy for the the fbh to come on. My belief was it came on , when temp dropped under +5c and stayed on until fuel reached somewhere around +20, then off it goes until it's needed again.
I add , once more, I could be talking nonsense

 

[Devilish]

15c seems rather balmy for the the fbh to come on. My belief was it came on , when temp dropped under +5c

Correct. The OP more than likely has a problem with the Webasto. If it is the PCB, the Webasto can remain in situ, anything else the Webasto has to come off.
Could be the dose pump, but unlikely.

 

[sheriff]

I could be wrong here, so will call in @Saint.V8 or @holidaychicken but 15c seems rather balmy for the the fbh to come on. My belief was it came on , when temp dropped under +5c and stayed on until fuel reached somewhere around +20, then off it goes until it's needed again.
I add , once more, I could be talking nonsense

Quite right @gold rover its either 4 or 5C

 

[gold rover]

Quite right @gold rover its either 4 or 5C

Thanks. I've obviously learned something , by osmosis, whilst hanging around here

 

[stella man]

Just looked in owners manual, which states on timed climate an electronic control unit checks for ambient temp of 16c before determining if heating or ventilation is required so was right in having timed climate but forgot about rest we all have to learn

 

[tj196443]

Thanks all for the replies it's much appreciated. The manual does say 16c and below and it should heat the cabin, if the temp is above16c then the car will vent the cabin to cool it down. If the temp is 5c and below it will then heat the engine to assist cold starting. The only time I can get it to switch in at a pre determined time is just after a run when the engine is still warm, I can hear something whirling away in the front passenger side wheel arch but no smoke and not what I would call really warm air coming from the cabin vents. I can't see any little exhaust pipe in the passenger side wheel arch, I have heard that the BMW Range Rovers have this but not sure about a later L322. Mines a late 2009 but I think is classed as a 2010 model as it has the TFT screen fitted so the exhaust for the FBH may be located somewhere else ?

 

[Devilish]

Ah, I think you are referring to the manual or timed heating, if this is not working, then the problem will be with the Webasto. Your L322 will have a Webasto Thermo top CZ or V
Have done two TDV8's last week with faulty Webasto PCB. I can test, diagnose, and repair/refurbish the Webasto, including PCB repair. My Wbus diagnostics interface is thowing a wobbly, and if I have to buy another, I may throw a wobbly also. Should have it up n running next week. it is only the Wbus though, so only throws its toys out the pram with RR BMW & Audi. Defender Freelander, MG Rover, and Marine are still mates with it.

The below 6 degrees is correct for the Webasto to start up as a aux heater automatically when the engine is started.

You are referring to the AC and ATC, and starting up the Webasto manually, that can be done at any temp, 16 degrees is the standard line between AC and ATC

 

[tj196443]

Thanks for the info Devilish much appreicated, I've noticed if I set the timed heat function and then exit the car that the auto button doesn't flash or that the fbh doesn't whirl when it reaches the preset time. If I sit in the car however and set it to come on at a set time the auto button will flash, the fans will come on for about 10 seconds at which point the auto button stops flashing and the fans stop ! I'm staring to think it's possessed

 

[Devilish]

Sorry for not replying, been real busy. It sounds to me like your FBH is faulty.
Basically when the FBH starts, the air fan runs for about 30 seconds to purge any fumes from the combustion chamber, it then idles as it performs self test. It then starts the dose pump at a slow rate, and turns on the glow plug. The air fan will slowly ramp up to full speed, the fuel rate will increase at the same time. The glow plug is turned off, which then functions as a flame sensor, and the FBH ramps up to full speed.

There are several symptoms of a faulty FBH, how long the air fan runs, and the pause between the air fan run time.

Regardless of the type of fault or failure, the FBH is designed to purge the combustion chamber to prevent backfire. This can be from air fan for a second or two > a second or two pause > then air fan for a minute or two. To the air fan just purging for a few minutes.

Problem I am having with Range Rover is its complicated communication with the FBH via its bus and HVAC etc, I still cannot remote start the PCB off the vehicle. I can remote start the FBH using a different PCB, but the Range Rover PCB can only have each circuit tested electronically, in theory this should work, and has on 2 I have done. Thing is, like the Freelander, FBH is under the bloody wheel arch, on a vehicle that can breast stroke. I can refurbish your FBH and repair any PCB component failure.

Several people have approached me about operating the FBH as a stand alone, without being tied to or Range Rover specific PCB, and Range Rover service, . This is easy by using a PCB that can be remote started simply by a earth or 12v signal. The FBH's communication with the vehicles bus system is disconnected at the FBH, and the pins in the 6 pin connector are rearranged. Then remote starting by hard wire, RF, or GSM is simple and cheap. Connecting the FBH to the ATC, involves getting to the power supply wires to the ATC control unit.

Is it just me, or is the Range Rover PCB start up linked to the bus, for people to reach into their pockets up to their elbow when it develops a fault.