SL/R230: R230 Heater Blower not working
Thread Starter
Newbie
Joined: Dec 2013
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R230, SL500
R230 Heater Blower not working
Hi,
I have been replacing items to try and get this to work as it just stopped working.
The heater control unit on the facia lights up when I press/turn anything.
The actual fan is working as I've connected it to 12v and it's fine.
The heating elements and automatic vent flaps are ok.
So, I changed the resistor pack on the blower unit from one I found on ebay (reproduction I think).. This made no difference. Thinking that part may be faulty from 'ebay' they sent another one again, it made no difference.
My next step, out of desperation, was to source a used heater control unit to replace my existing unit that appeared to light up and work. So I found one and fitted it but guess what... Still blower not working. (Even after I disconnected the battery and reconnected to see if it cleared).
As I've changed the only two things that I can think of, does anyone have any idea what the cause may please?
Thanks.
I have been replacing items to try and get this to work as it just stopped working.
The heater control unit on the facia lights up when I press/turn anything.
The actual fan is working as I've connected it to 12v and it's fine.
The heating elements and automatic vent flaps are ok.
So, I changed the resistor pack on the blower unit from one I found on ebay (reproduction I think).. This made no difference. Thinking that part may be faulty from 'ebay' they sent another one again, it made no difference.
My next step, out of desperation, was to source a used heater control unit to replace my existing unit that appeared to light up and work. So I found one and fitted it but guess what... Still blower not working. (Even after I disconnected the battery and reconnected to see if it cleared).
As I've changed the only two things that I can think of, does anyone have any idea what the cause may please?
Thanks.
Junior Member
Joined: May 2012
Posts: 50
Likes: 3
2007 E350
Thread Starter
Newbie
Joined: Dec 2013
Posts: 9
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R230, SL500
Thank you sawrench.
I didn't find this post and although I have tested the voltages which gave readings, the 'scan tool' suggested sounds like the way forward. The readings I got fluctuated 0-8v up and down without turning the controls to adjust fan speed.
I'm also wondering if those sensors mentioned could be an issue in this too. Hmmmm...
My fan blower & Regulator Pack and heater controls are fine.
So complicated...
I didn't find this post and although I have tested the voltages which gave readings, the 'scan tool' suggested sounds like the way forward. The readings I got fluctuated 0-8v up and down without turning the controls to adjust fan speed.
I'm also wondering if those sensors mentioned could be an issue in this too. Hmmmm...
My fan blower & Regulator Pack and heater controls are fine.
So complicated...
Junior Member
Joined: May 2012
Posts: 50
Likes: 3
2007 E350
Did you see this thread?
http://forums.mercedesclub.org.uk/sh...d.php?t=126377
It's kinda sounding like the sun sensor or pollution sensor on this thread too! It's still on going though.
http://forums.mercedesclub.org.uk/sh...d.php?t=126377
It's kinda sounding like the sun sensor or pollution sensor on this thread too! It's still on going though.
Last edited by sawwrench; Jan 24, 2014 at 03:48 PM. Reason: add my 2 cents
Thread Starter
Newbie
Joined: Dec 2013
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R230, SL500
That's mine on that forum. My username is different on here as it was already used when I joined here the other day.
That thread is still going and something come out from one of these hopefully. That last find of yours has got us thinking about sensors
Thanks.
That thread is still going and something come out from one of these hopefully. That last find of yours has got us thinking about sensors
Thanks.
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Thread Starter
Newbie
Joined: Dec 2013
Posts: 9
Likes: 0
R230, SL500
Hi,
I have been replacing items to try and get this to work as it just stopped working.
The heater control unit on the facia lights up when I press/turn anything.
The actual fan is working as I've connected it to 12v and it's fine.
The heating elements and automatic vent flaps are ok.
So, I changed the resistor pack on the blower unit from one I found on ebay (reproduction I think).. This made no difference. Thinking that part may be faulty from 'ebay' they sent another one again, it made no difference.
My next step, out of desperation, was to source a used heater control unit to replace my existing unit that appeared to light up and work. So I found one and fitted it but guess what... Still blower not working. (Even after I disconnected the battery and reconnected to see if it cleared).
As I've changed the only two things that I can think of, does anyone have any idea what the cause may please?
Thanks.
I have been replacing items to try and get this to work as it just stopped working.
The heater control unit on the facia lights up when I press/turn anything.
The actual fan is working as I've connected it to 12v and it's fine.
The heating elements and automatic vent flaps are ok.
So, I changed the resistor pack on the blower unit from one I found on ebay (reproduction I think).. This made no difference. Thinking that part may be faulty from 'ebay' they sent another one again, it made no difference.
My next step, out of desperation, was to source a used heater control unit to replace my existing unit that appeared to light up and work. So I found one and fitted it but guess what... Still blower not working. (Even after I disconnected the battery and reconnected to see if it cleared).
As I've changed the only two things that I can think of, does anyone have any idea what the cause may please?
Thanks.
Its also odd that regardless of turning the speed control, the voltage never changes...
Thread Starter
Newbie
Joined: Dec 2013
Posts: 9
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R230, SL500
Hi,
Sadly not yet.
No one seems to have encountered a problem past what checks I've already described in the thread.
My independent specialist has been poorly so I've had problems booking it in but this will now hopefully be done this week.
Will update when sorted and thanks for checking.
Meanwhile, if there is anyone out there that can advise you would be most welcome!
Sadly not yet.
No one seems to have encountered a problem past what checks I've already described in the thread.
My independent specialist has been poorly so I've had problems booking it in but this will now hopefully be done this week.
Will update when sorted and thanks for checking.
Meanwhile, if there is anyone out there that can advise you would be most welcome!
Thread Starter
Newbie
Joined: Dec 2013
Posts: 9
Likes: 0
R230, SL500
Fixed
Be aware of eBay aftersales parts. I've found that both reg packs I bought were defective.
After replacing two reg packs, a heater control panel and many many hours of head scratching, the problem was due to vermin getting up into the engine area and gnawing on an a small ground wire.
After replacing two reg packs, a heater control panel and many many hours of head scratching, the problem was due to vermin getting up into the engine area and gnawing on an a small ground wire.
