Home > Technical (L322) > Heater not heating at all!! |
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Chris1573 Member Since: 30 Jan 2021 Location: Gloucestershire Posts: 162 |
check you coolant level in the engine. There is a bleed screw on top of the water bottle. L322 2007 TDV8 3.6 |
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8th Oct 2021 7:42am |
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Dolphinboy Member Since: 07 Dec 2009 Location: Bristol Posts: 3161 |
if the coolant pipes are getting hot but no heat in cabin, it could be the internal heat flaps sticking. press the individual buttons (windscreen/face/feet) to get them moving again. also, (this worked for me once) take the pollen filter out and re-seat back in again (it's in the back of the engine compartment right under the windscreen) |
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8th Oct 2021 8:26am |
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umitbat Member Since: 06 Jan 2010 Location: Space Posts: 433 |
Coolant level is ok. Dolphin I will try but I am confused about Polen filter and heating. How does it affect heating? 2010 3.6tdv8 180k km. sold 06 td6 160k Sold 03 td6 260k |
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8th Oct 2021 9:18am |
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Dolphinboy Member Since: 07 Dec 2009 Location: Bristol Posts: 3161 |
dunno but it may have been incorrectly inserted originally and was putting pressure on the flap mechanism?
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8th Oct 2021 1:26pm |
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umitbat Member Since: 06 Jan 2010 Location: Space Posts: 433 |
Yes pipes going in are not hot enough.
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9th Oct 2021 12:48pm |
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Discotigger Member Since: 12 Feb 2013 Location: Cumbria Posts: 804 |
It could be the single heater control valve, located on the left hand side bulkhead (as you look at the engine). It has three hoses connected to it and the valve is solenoid operated. There's some internals in the valve, consisting of the solenoid, a plunger and a couple of rubber washers. The washers and plunger sometimes get stuck, as the rubber degrades over time, stopping the valve from passing hot fluid through to the heater matrix. You can get repair kits to refurbish the washer, plunger, etc., there's plenty on eBay. Get the valve out and replace the internals, refit valve and all should work again.
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11th Oct 2021 11:19am |
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umitbat Member Since: 06 Jan 2010 Location: Space Posts: 433 |
Thanks Disco for great help.
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11th Oct 2021 7:02pm |
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Discotigger Member Since: 12 Feb 2013 Location: Cumbria Posts: 804 |
Here's a link to the typical repair kits on ebay:
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11th Oct 2021 7:59pm |
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umitbat Member Since: 06 Jan 2010 Location: Space Posts: 433 |
Sorry for your health problems mate:(
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11th Oct 2021 9:34pm |
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Discotigger Member Since: 12 Feb 2013 Location: Cumbria Posts: 804 |
Are you looking at item 10 on the diagram, that's the FBH control valves and is actually a 2 solenoid valve unit. The main heater control valve only has one solenoid. I'll try and dig out a diagram for you so you know what you need to look at.
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11th Oct 2021 9:48pm |
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Discotigger Member Since: 12 Feb 2013 Location: Cumbria Posts: 804 |
It's item 5 on this section of the WM I'm talking about.
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11th Oct 2021 10:01pm |
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umitbat Member Since: 06 Jan 2010 Location: Space Posts: 433 |
Mate I think single one is the FBH unit.
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12th Oct 2021 4:24am |
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Discotigger Member Since: 12 Feb 2013 Location: Cumbria Posts: 804 |
The double solenoid valve unit is for the coolant to the heater matrix, but it's not the valve that causes the main problems, its the changeover valve that channels hot coolant to the heater matrix either from the FBH or from the engine. The double solenoid valve routes coolant to either side of the matrix, but coolant first has to go through the single valve. When the FBH operates the changeover valve routes coolant to the matrix, but if this valve is not working properly, i.e. when the rubber washer is knackered, the engine coolant won't get to the matrix.
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12th Oct 2021 9:16am |
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Discotigger Member Since: 12 Feb 2013 Location: Cumbria Posts: 804 |
Just to further clarify the above, I realised in one of the above posts I'd accidentally referred to the double valve as being the FBH control valve.
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12th Oct 2021 10:33am |
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