Oh I see.
Yes both sides are cold.
Nobody mentioned about fbh valve can cause this.
I must check the hose that comes to the double sided selonoid.
It was a little warm when stationary. If temperature switch controls it and one side is cold when selected then coolant valve may be OK?
If it is not hot then fbh unit is faulty?

And where is it located? I have never seen it!

Can Final resistor cause this? 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

Hi,
The FBH itself will not affect the heating function, so I doubt that it's faulty.
I've attached a diagram from the Auxiliary Heating Section of the Workshop Manual to explain how the system works, this diagram shows the correct component layout and will explain why the Changeover Valve not working will more than likely be the cause of getting no heat at all. I had a look at the diagram from the Climate Control Section of the Workshop Manual and it's totally incorrect in its numbering of the components, so it just causes confusion.

Here's the correct diagram and an explainer of how the coolant circuit works:-

Yes I tried the temperature gauges.
Outside air only gets less cold at hottest.
Both side operate at same ratio.
But upper hose of the double valve is really hot.
Should not it be warm if fbh valve was busted?

I started loosing coolant after flush and new antifreeze.
I wonder if that has a factor of this issue.
And can these valves cause water leak? 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

Can you check all the hoses once the engine has warmed up and let me know which ones are hot and which ones are cold.
There's the Changeover Valve on the LHS of the Engine Bay:



Then there's the Dual Control Valves on the RHS of the Engine Bay:




As previously said, it is usually the Changeover Valve that causes most of the problems if you're not getting any heat at all.
Are you losing much coolant and was the heating working prior to the flush and refill? It's possible there could be an airlock in the system, but haven't heard of the valves themselves leaking.

All these three pipes are same,hot but u can hold.
None of them is cold.
I think the lowest one is from fbh valve.
Selonoids are really hot u can't hold.

It is warm when start with hot engine then gets cold.
Same description of many people suffering from coolant valve.

Click image to enlarge

It was working fine before flush.
I did the flush by adding coolant while taking out from return pipe without emptying the coolant tank.
I did not measure but about a litre every week. 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

Hi,
I've got one quick question, is your FFRR fitted with the remote park heating module, i.e. does it have a separate remote control fob to activate the Fuel Burning Heater or does it need to be set from the Display Screen?
Cheers

I don't think it has remote control for fbh.
I bought it second hand there was no extra remote but will check from screen. 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

AHA, that could explain a couple of things. The single changeover valve is probably not fitted to your FFRR as it was an optional extra on the HSE models and was only fitted if you had the remote park heating installed, so the problem will most likely be with the double coolant valve. By the sounds of it, the internal rubber washers have perished and are stopping the coolant getting through to the heater matrix. I'd replace the double cooler valve, as it's also possible the electric solenoids might not be working properly.
Whilst you have the double cooler valve out of the car, I'd suggest you check the little coolant pump that is mounted on the same bracket as the double valve, to make sure that's working okay. It is possible that some coolant is leaking out of the double coolant valve, but I would suggest sorting that first and then see if the coolant loss persists.

And is that optional valve on the left side of the engine?
Mine has nothing there.
I will probably change tomorrow and let you know the result. 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

Yes, that's correct. I only realised when I looked through one of the older workshop manuals and realised that the changeover valve (the one on the LHS of the engine bay) is only fitted if you have the remote parking module fitted. The HSE model wasn't fitted with the remote park heating module as standard, therefore if the module hasn't been specified as an optional extra, then it won't have the extra valve fitted either.
Apologies from me for not realising sooner,but hope you get it sorted out now.

Mate thanks for ideas and response.

Hope you are feeling better on your back issues.  2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

I've been watching this thread with some concern as I was convinced my heating system was not working as I was being blasted with cold air with very little heat when the AC was on and when I turned it off it was too hot. Then I noticed a small wheel with red and blue on the control panel ........  2012 TDV8 Vogue (L322)

I changed the valve seems no change:(

Another point is there was air in cooling system.
After taking it out once it heated fine for 5 minutes and stopped heating again.

The valve that came out was dirty inside but my coolant is new and fresh so is there a blockage in radiator?
We will try flushing radiator tomorrow. 2010 3.6tdv8 180k km.
sold 06 td6 160k
Sold 03 td6 260k

Last edited by umitbat on 16th Oct 2021 4:50pm. Edited 1 time in total

Another weird thing is driver side middle vent gives more air than passenger sidE.

Click image to enlarge