2002 Cooper S lukewarm heater - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Faults & Fixes > First Generation Faults & Fixes


First Generation Faults & Fixes MINI faults and fixes 2001 - 2006

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
MINI COOPER 07 heater blowing cold air-HELP huntdiane Second Generation Faults & Fixes 15 Mar 18th, 2013 10:55 PM
Heater controls on '03 Cooper... zappafan First Generation Faults & Fixes 2 Mar 4th, 2011 11:48 PM
mini cooper 02 HEATER NOT WORKING? milkeyjack First Generation Faults & Fixes 16 Feb 3rd, 2010 10:10 PM
Anyone get a block heater or oil pan heater installed? cheswick Canada 3 Nov 6th, 2009 08:26 PM
Block Heater, or Oil Pan heater? ChilliSteve Canada 1 Nov 17th, 2003 09:54 PM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old Oct 25th, 2011, 05:26 PM
MINI2 Newbie
Offline
 
Join Date: Oct 2011
Location: Swansea, South Wales
Posts: 20
Local Time: 11:15 PM
United Kingdom Male
Unhappy 2002 Cooper S lukewarm heater

Hi guys, need some help, my 2002 cooper s (non climate control) has a problem with the heaters, they only blow lukewarm air, this is what i have done so far,

New thermostat, flushed system
Bled the system, everything is circulating
rad hot, all pipes hot & heater matrix also hot
Temp sits half way, no over heating
no oil in water, no water in oil, no smoking
heater knob cable attached both ends and when i turn it to cold it goes cold but when i turn it to hot i get lukewarm at best

I'm really stumped as the matrix is Boiling hot as in too hot to touch but still no heat.
Any ideas before i burn it !!! Lol.

Last edited by Tim27; Oct 26th, 2011 at 12:58 AM.
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old Oct 25th, 2011, 06:11 PM
MINI2 Regular
Offline
 
Join Date: Jul 2011
Location: South Wales
Posts: 301
Local Time: 12:15 AM
United Kingdom Male
Modern cars are very difficult to bleed the coolant system due to the cluttered engine bay and tight angled pipe work, did you use the bleed valves fitted and did you bleed it when the heaters where on hot but blowers off. As this is either air in the matrix or the heater valve which controls the flow of water through it isnt openning fully due to say a cable clip come off. Make sure its the inner cable moving not the outer casing on the heater cables, if its easy, remove the cable and move the valve by hand if possible or visually see that its travelling to both stops, hot and cold. The matrix may feel hot but the blower will cool this down rapidly if there is a restriction or air in it. I bet if you put your hand on it when the blowers are on you will feel it cool down. My bet is on air in the system. Just as a quick check, remove the coolant filler cap and rev the engine @ 1500 rpm and see if the heaters get hotter as this should shift some air out, remember that you will hold the revs untill thermostat opens at least.
Reply With Quote
  #3 (permalink)  
Old Oct 25th, 2011, 06:31 PM
mab01uk's Avatar
MINI2 Master
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,679
Local Time: 12:15 AM
United Kingdom Male
If you are really convinced their is no air lock in the system and have carried out all the checks as advised by Stead34..........the only other possibilty I can think off is perhaps one or other of the air blending flaps within the heater unit are not responding to the RH rotary control which directs and blends the hot/cold air to the various outlets. These can jam shut, not fully open or the plastic linkage mechanisms seize/break or the cable behind the control panel knob (drivers side) can also become dislodged meaning the hot air is not being directed/blended to the outlet vents.

Can you get any hot air out the dash eyeball vents or windscreen demister vents?

Mini One Heater Problem -
Quote:
"I found the problem to be that the linkage for the heater control below the consol on the drivers side was disconnected. The linkage had obviously been knocked and had jumped out of its socket. The location of the linkage is below the drivers left leg.
Once I re-located the linkage the heater worked fine."
http://www.mini2.com/forum/first-gen...r-problem.html

RealOEM.com BMW R50 Cooper Various Bowden cables / shafts
Reply With Quote
  #4 (permalink)  
Old Oct 25th, 2011, 06:45 PM
MINI2 Regular
Offline
 
Join Date: Jul 2011
Location: South Wales
Posts: 301
Local Time: 12:15 AM
United Kingdom Male
Yes, sorry if ive given wrong info on the way the heater control the temps, it is either done by a valve or flaps,flaps in this case but the checks will be the same though what ever is fitted, you just need to make sure that whatever the cable operates functions correctly..
Reply With Quote
  #5 (permalink)  
Old Oct 25th, 2011, 07:01 PM
MINI2 Newbie
Offline
 
Join Date: Oct 2011
Location: Swansea, South Wales
Posts: 20
Local Time: 11:15 PM
United Kingdom Male
Thanks for the reply's.
I'm a mechanic, and im pretty sure there's no air left in the system as everything is perfect, the heaters do not get any hotter when the revs are held up and yes its been bled with it set to hot and blower off. Also the matrix does not get cooler when the blowers are flat out it is still too hot to touch, also i have noticed if i leave it idle with the heater set to cold and the blowers off for 5 mins then turn it back to hot and put the blowers on it is hot but within a minute its back to cool/lukewarm and thats how it stays again.
Reply With Quote
  #6 (permalink)  
Old Oct 25th, 2011, 07:49 PM
MINI2 Regular
Offline
 
Join Date: Jul 2011
Location: South Wales
Posts: 301
Local Time: 12:15 AM
United Kingdom Male
If your sure the heater matrix is hot and circulating, then you need to check the heater box and its controls, as said if possible try and see the cables operating the flap and turn it manually if possible and hold it directing to hot, if its not the controls then the airbox may need to be removed for inspection..
Reply With Quote
  #7 (permalink)  
Old Oct 25th, 2011, 10:50 PM
mab01uk's Avatar
MINI2 Master
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,679
Local Time: 12:15 AM
United Kingdom Male
Photo below of non-climate MINI heater/ac unit out the car, note the silver metal horizontal shaft which controls the flaps via the flexible shaft from RH control panel knob, most of the flap actuating levers, etc are external to unit visible behind the dash/console and can be checked for movement.




The auto climate type of Mini heater unit below uses 3 small servo motors to control the flaps instead but manual levers, etc are very similar and clearer to see in this view:



http://www.realoem.com/bmw/showparts...48&hg=64&fg=45
Reply With Quote
  #8 (permalink)  
Old Oct 25th, 2011, 11:55 PM
MINI2 Newbie
Offline
 
Join Date: Oct 2011
Location: Swansea, South Wales
Posts: 20
Local Time: 11:15 PM
United Kingdom Male
Thanks for the input guys will check controls/heater box tomorrow and let you know.
Reply With Quote
  #9 (permalink)  
Old Oct 26th, 2011, 03:48 PM
MINI2 Newbie
Offline
 
Join Date: Oct 2011
Location: Swansea, South Wales
Posts: 20
Local Time: 11:15 PM
United Kingdom Male
Today i have,
first bled it again - no air.
re-checked matrix - so hot i can not keep my hand on it.
checked control cables, disconnected from heater box and operated arm manually from hot to cold and seems to be working(can hear flaps changing positions) and when it is on cold it blows cold but when on hot it blows lukewarm only.
If i turn the heaters to cold for 5 mins then back to hot and speed 1 i get hot air for about a minute before going cool, but if i put the blower flat out it goes cool instantly.
Really getting on my nerves now, i just don't understand, if the matrix is giving out adequate heat and the cables and flaps are operating correctly then where's my heat!!!!!!!!!
Also it's the same from all the vents upper, mid and lower.
Reply With Quote
  #10 (permalink)  
Old Oct 26th, 2011, 04:24 PM
MINI2 Master
Offline
 
Join Date: Feb 2011
Location: South london
Posts: 1,165
Local Time: 12:15 AM
United Kingdom Male
Hi ya

I have had something like this on another car and it turned out to be the pollen filter.
When I got it out I had never seen one in such bad state before. If you have one fitted remove it and see what happens
Just a surgeston as your previous posts says matrix is getting hot and vent flaps are working and the fan is working. Just a thought if it can't draw any air though the matrix = no hot air out.
Anyway hope it helps :-)
Reply With Quote
  #11 (permalink)  
Old Oct 26th, 2011, 05:34 PM
mab01uk's Avatar
MINI2 Master
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,679
Local Time: 12:15 AM
United Kingdom Male
Quote: Originally Posted by Tim27 (original)
If i turn the heaters to cold for 5 mins then back to hot and speed 1 i get hot air for about a minute before going cool, but if i put the blower flat out it goes cool instantly.

Running out of ideas now!

Does the fan boosted air flow have the same force whether blowing hot, cold or lukewarm?
I am just wondering if a flap/damper which blends hot and cold air has broken and is 'waving about in the breeze'........then when you boost the fan airflow perhaps it flips back into the position which cuts off all heat to the vents?

More info in links below which may be of help.........

There is a diagram in this NAM link below of the internal flaps/dampers and linkages, it is a climate unit but is very similar to the standard manual Mini heater apart from using servo control motors instead of bowden cables/rotary knobs to operate the linkage arms:
North American Motoring - View Single Post - Heater issues

This old Mini2 post below shows a photo of a broken plastic heater flap/damper:
Quote, "My problem was a broken cam follower arm on the heater air flow control damper"
http://www.mini2.com/forum/first-gen...ml#post3271704
Reply With Quote
  #12 (permalink)  
Old Oct 26th, 2011, 06:25 PM
MINI2 Newbie
Offline
 
Join Date: Oct 2011
Location: Swansea, South Wales
Posts: 20
Local Time: 11:15 PM
United Kingdom Male
Marque Thanks for the input, just whipped the pollen filter out didn't think to check that, it was caked but unfortunately still the same

Mab01uk, yes air flow is the same weather hot or lukewarm, but i have just noticed that the passenger dash vent is blowing slightly warmer than all the rest.
So i am starting to think that the problem is possibly inside the heater box and requiring a full strip down to find it what you think?
Reply With Quote
  #13 (permalink)  
Old Oct 26th, 2011, 06:35 PM
MINI2 Regular
Offline
 
Join Date: Jul 2011
Location: South Wales
Posts: 301
Local Time: 12:15 AM
United Kingdom Male
Operating the recirc will eliminate the pollen filter, strange its warm for a minute then cools down if going from hot to cold, you would put your money on the matrix cooling down, if you can get your hand on the matrix when the blower is on can you feel the forced air coming through being alot hotter than is getting to the vents, if this is the case you may have to take the dash out to investigate as you know the hot air is being produced but not getting to the vents...
Reply With Quote
  #14 (permalink)  
Old Oct 26th, 2011, 09:02 PM
Blackthou's Avatar
MINI2 Regular
Offline
 
Join Date: May 2011
Posts: 51
Local Time: 12:15 AM
United Kingdom
Could there be something restricting the flow through the matrix? It would still be hot to the touch and the heat would last as long as the blower took to cool it down as it is in limited supply.
Just a thought.

Convertibles are cool
Reply With Quote
  #15 (permalink)  
Old Oct 26th, 2011, 11:33 PM
mab01uk's Avatar
MINI2 Master
Offline
 
Join Date: Nov 2006
Location: London
Posts: 5,679
Local Time: 12:15 AM
United Kingdom Male
Quote: Originally Posted by Tim27 (original)
Mab01uk, yes air flow is the same weather hot or lukewarm, but i have just noticed that the passenger dash vent is blowing slightly warmer than all the rest.
So i am starting to think that the problem is possibly inside the heater box and requiring a full strip down to find it what you think?

Would be nice to be really sure of problem source first......as quite a big strip down job (even for you as a mechanic!) as you can see from pictures in this post:
http://www.mini2.com/forum/first-gen...ml#post3271704
....although dash can be taken out as complete assembly in one piece complete with steering wheel, wiring harness, etc.
(Looks easy on the factory production line at Oxford when I have seen them put in but dash assy goes in on a special lifting jig and then gets secured by the line workers with just 2 bolts each side!)

I would maybe be tempted first to try to locate a cheapish s/h Mini heater unit from a scrap yard to examine it more closely out of car for the potential fault areas.......would also be a source for spares if the problem does indeed look to be inside heater box?
Reply With Quote
Sponsored Links
Advertisement
 
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
MINI COOPER 07 heater blowing cold air-HELP huntdiane Second Generation Faults & Fixes 15 Mar 18th, 2013 10:55 PM
Heater controls on '03 Cooper... zappafan First Generation Faults & Fixes 2 Mar 4th, 2011 11:48 PM
mini cooper 02 HEATER NOT WORKING? milkeyjack First Generation Faults & Fixes 16 Feb 3rd, 2010 10:10 PM
Anyone get a block heater or oil pan heater installed? cheswick Canada 3 Nov 6th, 2009 08:26 PM
Block Heater, or Oil Pan heater? ChilliSteve Canada 1 Nov 17th, 2003 09:54 PM

» Recent Threads
Trying to figure out where the last connector goes???
Today 10:28 PM
by Eirhead
Last post by Eirhead
Today 10:28 PM
0 Replies, 9 Views
Timing chain tensioner upgrade?
Yesterday 11:05 PM
by ben2012
Last post by ben2012
Today 09:51 PM
1 Replies, 180 Views
New member seeking advice!!
Today 07:50 PM
by Buick7
Last post by Buick7
Today 07:50 PM
0 Replies, 74 Views
speed sensor
Today 06:52 PM
Last post by Goofeyrider
Today 06:52 PM
0 Replies, 65 Views
Cooper EML very odd!
Today 05:33 PM
by maffup
Last post by maffup
Today 05:33 PM
0 Replies, 114 Views
heat problem
Aug 24th, 2014 10:04 AM
Last post by mab01uk
Today 04:24 PM
8 Replies, 551 Views
Need opinions. do I join the Mini family or the VW family.
Today 10:17 AM
by jnapier
Last post by mab01uk
Today 04:17 PM
1 Replies, 201 Views
Brake light with car on lift indicated.
Today 02:01 PM
Last post by stexasmini1
Today 02:01 PM
0 Replies, 117 Views
Can't post in Classifieds
Yesterday 07:47 AM
by Jonny_5
Last post by Jonny_5
Today 12:19 PM
4 Replies, 402 Views
how to extinguish brake wear warning light
Today 01:44 AM
Last post by cristo
Today 12:17 PM
3 Replies, 261 Views
Blanking plug for AUX install
Aug 6th, 2014 09:55 AM
Last post by excession
Today 11:11 AM
2 Replies, 482 Views
PAssenger Door won't open from inside using the handle
Aug 9th, 2014 09:13 PM
Last post by The Nun
Today 09:10 AM
2 Replies, 405 Views
Powe steering pump fan
Yesterday 05:42 PM
Last post by mab01uk
Today 07:29 AM
3 Replies, 273 Views
What do you think of this mini? And a couple questions...
Jul 12th, 2014 08:44 AM
Last post by Moonwalker09
Today 01:04 AM
4 Replies, 930 Views
My New Mini MCS
Mar 22nd, 2013 11:15 PM
by mossyS
Last post by KarenTMonn
Yesterday 11:50 PM
6 Replies, 2,879 Views
TWINI - Twin engine R53 Endurance Race Car
Jul 18th, 2013 08:30 PM
by pooper
Last post by KarenTMonn
Yesterday 11:37 PM
2 Replies, 2,657 Views
$115 Buttonwillow Raceway August 30-31st
Aug 21st, 2014 06:29 AM
by harvie
Last post by harvie
Yesterday 10:28 PM
1 Replies, 302 Views
Amp and Sub Woofer: Seeking Help & Advice
Aug 18th, 2014 05:17 AM
Last post by SteveM3
Yesterday 10:12 PM
1 Replies, 388 Views
Fan coming on when engine cold and staying on after engine turned off
Yesterday 10:08 PM
Last post by Eviek14g
Yesterday 10:08 PM
0 Replies, 298 Views
Semi-Integrated Sat Nav Question
Yesterday 12:43 PM
by dhosein
Last post by SteveM3
Yesterday 09:23 PM
1 Replies, 196 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 11:15 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2