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'04 XJR drivers side heat problem

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  #1  
Old 09-30-2009, 11:16 AM
chromecicada
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Default '04 XJR drivers side heat problem

my 2004 XJ blows great heat from the passenger side vents, but only blows luke warm from the drivers side vents. Now that its getting cold outside, it needs to be addressed. Is this a common problem? Will i most likely need to remove the heater box to find the problem?
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Old 09-30-2009, 12:45 PM
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Replace the heater control valve in the passenger front lower engine compartment and hope that it was only stuck closed and didnt short the ac control panel
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Old 10-09-2009, 10:19 AM
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Thanks for the quick response. This car doesn't have a heater control valve that i could find (i looked under the aux. water pump). What i ended up finding was a heater core that was half clogged with an orange gritty slime. the clogged portion extended into the drivers side of the heater box, while the free flowing portion was on the passenger side. Once i removed the glove box and the blower motor air box, it was fairly easy to replace.
This is a great forum! i hope this info can help someone else with a heat problem.
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Old 10-09-2009, 11:06 AM
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Uh yes i work on them all day, it has a heater control valve(dual) that how it allows 2 different temp setting between the passenger and driver
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Old 10-09-2009, 04:33 PM
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Iím sorry for the misunderstanding, itís entirely my fault. I should have described the vehicle better. This is a 2004 Jaguar XJR supercharged 4.2. It has no dual heater control valve like, say an S-Type does (even with the same engine). The main difference is the type of heater core: the dual heater control valve system has three heater hoses going to the heater core. One for drivers side heat, one for passenger side heat, and a shared return line. It is essentially two heater cores in one. The non-dual heater control system has two heater hoses going to the heater core, one supply and one return. The dual zone temperature is controlled by blend door manipulation, not coolant flow.
Again, Iím sorry for the confusion. I know your time and knowledge are valuable and I appreciate you sharing a little of it with me.
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Old 02-27-2016, 01:44 PM
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Wondering if anyone can help me... Have a problem with the climate control on th drivers side... Passengers side working fine and drivers side has nothing.... This car is a 2004 Jaguar XJ the pipes are warm going into the car but is only heating passengers side also the vent controls are working can someone help please
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Old 02-27-2016, 01:55 PM
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This is a well known syndrome and usually caused by the heater matrix being partially blocked. Unfortunately, this is a fairly major job to fix, so expensive in labour charges. You could, as a first step, try flushing the matrix, but success is by no means guaranteed. It is not necessary to dismantle the whole console, but there is still a lot to do.


These cars also have an auxiliary coolant flow pump to assist the circulation through the heater, but if this has failed, you'd likely have little heat on either side of the car. It's worth checking this pump, though, just in case it has failed. The pump pulls coolant through the heater rather than pushing it.
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Old 02-27-2016, 05:28 PM
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Don't bother with heater. You have to change that aux pump. It will solve issue 105%. Did on my car.
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2005, blend, control, door, drivers, dual, heat, heating, jaguar, location, motor, side, valve, vents, xj8, xjr


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