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Old 11-13-2005, 11:01   #1 (permalink)
Smudge
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110 CSW Heater

Perhaps someone could help me out, with winter coming on I have
realised that my heater blower is U/S (110 CSW). I have traced the
cables out and I am a bit confused over the purpose of the resistor in
the top of the unit. I have 12v going into the motor unit and I can
detect a closed circuit across the two cables going into the motor. I
then have a cable from the motor and two others that go into this
resistor. I seem to be getting a short from somewhere which occasionaly
blows the fan fuse. I suppose my questions are as follows:

1. What is the resistor for and could it be the cause of my problems
2. Can anyone shed any light on what could be the problem before I have
to commit to removing the heater assembly completely
3. Anybody have a rough idea on the cost of a new blower motor if mine
is dead

Thanks in advance

Smudge

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Old 11-13-2005, 11:01   #2 (permalink)
Austin Shackles
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Re: 110 CSW Heater

On or around 13 Nov 2005 10:32:57 -0800, "Smudge"
<austin_smithspam@dsl.pipex.com> enlightened us thusly:

>Perhaps someone could help me out, with winter coming on I have
>realised that my heater blower is U/S (110 CSW). I have traced the
>cables out and I am a bit confused over the purpose of the resistor in
>the top of the unit. I have 12v going into the motor unit and I can
>detect a closed circuit across the two cables going into the motor. I
>then have a cable from the motor and two others that go into this
>resistor. I seem to be getting a short from somewhere which occasionaly
>blows the fan fuse. I suppose my questions are as follows:
>
>1. What is the resistor for and could it be the cause of my problems
>2. Can anyone shed any light on what could be the problem before I have
>to commit to removing the heater assembly completely
>3. Anybody have a rough idea on the cost of a new blower motor if mine
>is dead


resistor is for speed control - you have a 2-speed blower, ISTR...

try bypassing it and see if the motor spins. But if it's nogo in all speed
positions, 's more likely to be the motor.
--
Austin Shackles. www.ddol-las.net my opinions are just that
"I am tired and sick of war. Its glory is all moonshine... War is hell"
Gen. Sherman (1820-1891) Attr. words in Address at Michigan Military
Academy, 19 June 1879.
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Old 11-14-2005, 01:01   #3 (permalink)
beamendsltd
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Re: 110 CSW Heater

In message <vb2fn1hqe8pvqbtk27ov7bn1bk4guiub5b@4ax.com>
Austin Shackles <austinNOSPAM@ddol-las.net> wrote:

> On or around 13 Nov 2005 10:32:57 -0800, "Smudge"
> <austin_smithspam@dsl.pipex.com> enlightened us thusly:
>
> >Perhaps someone could help me out, with winter coming on I have
> >realised that my heater blower is U/S (110 CSW). I have traced the
> >cables out and I am a bit confused over the purpose of the resistor in
> >the top of the unit. I have 12v going into the motor unit and I can
> >detect a closed circuit across the two cables going into the motor. I
> >then have a cable from the motor and two others that go into this
> >resistor. I seem to be getting a short from somewhere which occasionaly
> >blows the fan fuse. I suppose my questions are as follows:
> >
> >1. What is the resistor for and could it be the cause of my problems
> >2. Can anyone shed any light on what could be the problem before I have
> >to commit to removing the heater assembly completely
> >3. Anybody have a rough idea on the cost of a new blower motor if mine
> >is dead

>
> resistor is for speed control - you have a 2-speed blower, ISTR...
>
> try bypassing it and see if the motor spins. But if it's nogo in all speed
> positions, 's more likely to be the motor.


It's also worth taking the grille off the wing and haveing a grope
around in the duct - it's not unknown for the dump valave to get
blocked leaving the motor immersed in water.

RTC4200 Heater Blower Motor - RHD - Defender to LA939975 64.92
UTP1911 Heater Blower Motor - RHD - Defender from MA939976 64.62
both inc VAT

Richard
--
www.beamends-lrspares.co.uk sales@beamends-lrspares.co.uk
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Powered by Risc-OS - you won't get a virus from us!!
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Old 11-14-2005, 02:01   #4 (permalink)
Smudge
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Re: 110 CSW Heater

Thanks for the responses, I'll have a rummage down the duct at the
weekend...!

Smudge

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Old 11-14-2005, 09:02   #5 (permalink)
Rob
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Re: 110 CSW Heater

I spent a happy time sorting what sounds like a similar problem - constantly
blowing fuses - turned out that the blower is known to build up
esistance - the fix was a new motor!

Reasonably easy job iirc.

"Smudge" <austin_smithspam@dsl.pipex.com> wrote in message
news:1131962052.891958.107050@g49g2000cwa.googlegroups.com...
> Thanks for the responses, I'll have a rummage down the duct at the
> weekend...!
>
> Smudge
>



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