rover 75 v6 conn heater problem - Page 2

FredSpencer · 3rd February 2010, 19:46

If there is air blowing out of both sides when the fan is on then presumably the flaps are open. If one side is blowing cold when it should be hot that is usually diagnosed on the forum as a matrix blockage.

You can also run on-board checks to see if any faults show up per this http://www.the75andztclub.co.uk/foru...hread.php?t=46

The Jugs · 3rd February 2010, 22:51

I'm with CWMRUDRAGON on this. Had same symptoms on mine, pulled

matrix out, cleaned and

. Back to the happy

, now toasting

Fraser Mitchell · 4th February 2010, 13:05

I also browse the Jaguar forum and similar problems have been reported with heater matrixes silting up. But where does the silt come from, that is the question ? Is it from use of hard water when mixing up the coolant ?

Fraser Mitchell · 4th February 2010, 13:08

Further to my last post, I seem to remember the use of a citric acid mix to clear out heater matrixes. Don't worry, citric acid is commonly found in lemonade and other fizzy drinks, so is not dangerous !! The citric acid goes for the lime scale and dissolves it.

stinkinunrich · 4th February 2010, 13:40

i have had to clean mine out two times and both times it looked like lime scale also since cleaning out i have added k seal and it has had no effect on the heater as yet and its been in for 8 months.

Fraser Mitchell · 4th February 2010, 20:11

I have since done an internet search and it appears the kettle descalers one can buy in Tesco and elsewhere are all solutions of citric acid. I would think these should do the job, although 2 might be necessary for bad clagging. Trouble is you can't see inside the matrix like you can the inside of a kettle ! Maybe someone has already tried these cures ?

payner75t · 4th February 2010, 20:17

got my car back this evening and as suspected the matrix was blocked.
mine was furred up and blocked by limescale!!! (see your kettle for details!!_)
the garage told me that the motors for the flaps very rarely go wrong.
a word of warning though new heater matrix's are not available at the moment!!!!

johnboywood · 6th February 2010, 19:52

ill try somesort of kettle descaler and see how it goes

kaiser · 15th February 2010, 06:12

And how did it go??

kaiser · 3rd March 2010, 07:04

Quote:

Originally Posted by johnboywood

ill try somesort of kettle descaler and see how it goes

And the results are?????

3rd February 2010, 22:51	#12
The Jugs Loves to post Rover 75 saloon club SE manual 2.0 V6 Join Date: May 2008 Location: Chatham, Kent. Posts: 289 Thanks: 0 Thanked 0 Times in 0 Posts	I'm with CWMRUDRAGON on this. Had same symptoms on mine, pulled matrix out, cleaned and . Back to the happy , now toasting __________________ [SIGPIC][/SIGPIC]

6th February 2010, 19:52	#18
johnboywood Regular poster rover 75 v6 2.5 Join Date: Jan 2010 Location: nottingam Posts: 32 Thanks: 0 Thanked 0 Times in 0 Posts	hi ill try somesort of kettle descaler and see how it goes

3rd February 2010, 19:46	#11
FredSpencer Passed Away Typhoon ZT 190+ Saloon Join Date: Aug 2009 Location: Leeds Posts: 6,833 Thanks: 0 Thanked 18 Times in 10 Posts	If there is air blowing out of both sides when the fan is on then presumably the flaps are open. If one side is blowing cold when it should be hot that is usually diagnosed on the forum as a matrix blockage. You can also run on-board checks to see if any faults show up per this http://www.the75andztclub.co.uk/foru...hread.php?t=46

4th February 2010, 13:05	#13
Fraser Mitchell Gets stuck in Rover 75 2.5 V6 Club Auto Join Date: Feb 2007 Location: Crewe Posts: 898 Thanks: 0 Thanked 0 Times in 0 Posts	I also browse the Jaguar forum and similar problems have been reported with heater matrixes silting up. But where does the silt come from, that is the question ? Is it from use of hard water when mixing up the coolant ?

4th February 2010, 13:08	#14
Fraser Mitchell Gets stuck in Rover 75 2.5 V6 Club Auto Join Date: Feb 2007 Location: Crewe Posts: 898 Thanks: 0 Thanked 0 Times in 0 Posts	Further to my last post, I seem to remember the use of a citric acid mix to clear out heater matrixes. Don't worry, citric acid is commonly found in lemonade and other fizzy drinks, so is not dangerous !! The citric acid goes for the lime scale and dissolves it.

4th February 2010, 13:40	#15
stinkinunrich Regular poster rover 75 2.5 conni Join Date: Oct 2008 Location: cradley heath Posts: 49 Thanks: 0 Thanked 0 Times in 0 Posts	i have had to clean mine out two times and both times it looked like lime scale also since cleaning out i have added k seal and it has had no effect on the heater as yet and its been in for 8 months.

4th February 2010, 20:11	#16
Fraser Mitchell Gets stuck in Rover 75 2.5 V6 Club Auto Join Date: Feb 2007 Location: Crewe Posts: 898 Thanks: 0 Thanked 0 Times in 0 Posts	I have since done an internet search and it appears the kettle descalers one can buy in Tesco and elsewhere are all solutions of citric acid. I would think these should do the job, although 2 might be necessary for bad clagging. Trouble is you can't see inside the matrix like you can the inside of a kettle ! Maybe someone has already tried these cures ?

4th February 2010, 20:17	#17
payner75t Gets stuck in Saab 900 convertible,Ford Mondeo zetec tdci Join Date: Feb 2007 Location: Braintree Posts: 808 Thanks: 16 Thanked 7 Times in 7 Posts	got my car back this evening and as suspected the matrix was blocked. mine was furred up and blocked by limescale!!! (see your kettle for details!!_) the garage told me that the motors for the flaps very rarely go wrong. a word of warning though new heater matrix's are not available at the moment!!!!

15th February 2010, 06:12	#19
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	And how did it go??