Effective passenger side heating

donc · 30th November 2018, 21:18

Hi I have a 2005 1.8t and the heater on the passenger side is not getting hot. I have been told it could be due to a partially blocked heater matrix or faulty sensors or a motor controlling the heat flap. Must say the running temperature of the car is fine and the heat on the drivers side is good. I have tried opening the bleed valve on the pipe from the radiator and an not get fluid to come out. Does this indicate air in the system which is causing the problem? Would very much welcome ideas. Thanks

SD1too · 30th November 2018, 21:53

to the club Don.

Quote:

Originally Posted by donc

I have tried opening the bleed valve on the pipe from the radiator and an not get fluid to come out. Does this indicate air in the system which is causing the problem?

Most likely, yes. Has anybody been working on your cooling system recently?

Simon

donc · 1st December 2018, 14:50

Yes I've had a reconditioned head fitted. That was after I had the head gasket replaced without skimming the head. An expensive mistake! Now the car runs fine apart from the passenger having no heat!!

COLVERT · 1st December 2018, 19:08

Try a cooling system air bleed. Lots of info in the How-To's.

SD1too · 2nd December 2018, 08:09

Quote:

Originally Posted by donc

Yes I've had a reconditioned head fitted ... Now the car runs fine apart from the passenger having no heat!!

Ah ha! What has probably happened Don is that whoever did this work refilled the cooling system without following the specified MG Rover procedure and so an air lock has been introduced.

Here it is now. You can do it yourself if you're reasonably handy with the spanners.

Simon

marinabrian · 2nd December 2018, 08:44

If the drivers side is warm and the passenger side cold, then the most likely cause is a silted up heater matrix.

It is not possible to get an air pocket in the heater matrix alone, if it has flow to the drivers side, then the only explanation for the passenger side being cold is for the matrix to be blocked.

Given the car is an 1800, has there been any "magic potions" added to the coolant in the past?

Brian

donc · 3rd December 2018, 15:32

Many thanks for all your help! There now seems no air lock so maybe a blocked matrix is the problem. Again, thanks for the advice.

COLVERT · 3rd December 2018, 16:33

Quote:

Originally Posted by donc

Many thanks for all your help! There now seems no air lock so maybe a blocked matrix is the problem. Again, thanks for the advice.

Just one thing. You didn't actually say if it occurred immediately after the head change or has slowly becoming worse over time.

A head change could, maybe, dislodge some sludge which seems to be happy when arriving in the matrix to decide to live there. ---Lol.

30th November 2018, 21:18	#1
donc Avid contributor Rover 75 Join Date: Sep 2018 Location: Kirk Ella Posts: 141 Thanks: 9 Thanked 43 Times in 14 Posts	Effective passenger side heating Hi I have a 2005 1.8t and the heater on the passenger side is not getting hot. I have been told it could be due to a partially blocked heater matrix or faulty sensors or a motor controlling the heat flap. Must say the running temperature of the car is fine and the heat on the drivers side is good. I have tried opening the bleed valve on the pipe from the radiator and an not get fluid to come out. Does this indicate air in the system which is causing the problem? Would very much welcome ideas. Thanks

1st December 2018, 14:50	#3
donc Avid contributor Rover 75 Join Date: Sep 2018 Location: Kirk Ella Posts: 141 Thanks: 9 Thanked 43 Times in 14 Posts	Heating problem Yes I've had a reconditioned head fitted. That was after I had the head gasket replaced without skimming the head. An expensive mistake! Now the car runs fine apart from the passenger having no heat!!

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1st December 2018, 19:08	#4
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Try a cooling system air bleed. Lots of info in the How-To's.

2nd December 2018, 08:44	#6
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	If the drivers side is warm and the passenger side cold, then the most likely cause is a silted up heater matrix. It is not possible to get an air pocket in the heater matrix alone, if it has flow to the drivers side, then the only explanation for the passenger side being cold is for the matrix to be blocked. Given the car is an 1800, has there been any "magic potions" added to the coolant in the past? Brian

3rd December 2018, 15:32	#7
donc Avid contributor Rover 75 Join Date: Sep 2018 Location: Kirk Ella Posts: 141 Thanks: 9 Thanked 43 Times in 14 Posts	Many thanks for all your help! There now seems no air lock so maybe a blocked matrix is the problem. Again, thanks for the advice.