ot in charge.
YMMV
Fred Moir.
Lynn MA.
Diesel preferred.
From: Mercedes on behalf of Ralph,'84TD via
Mercedes
Sent: 08 December 2016 06:33
To: Mercedes Discussion List
Cc: Ralph,'84TD
Subject: Re: [MBZ] 300SDL A/C electrical problem
It is the SDL car,
33
To: Mercedes Discussion List
Cc: Ralph,'84TD
Subject: Re: [MBZ] 300SDL A/C electrical problem
It is the SDL car, thanks for the input. My next question is simpler; should
I have an A/C specialist do this testing work, or a garage that works mainly on
European Vehicles? I have both in
Ralph,
What you need is a shop that has the wiring diagrams for your car, and as
Dan said a DC Voltmeter, and then the skill to combine both in order to
perform some tests and determine the problem.
An MB (or European) specialist should be faster (less shop time, maybe less
$$$) because they alre
There is nothing specialized about the system on this car that would require
unique or unusual equipment. Any come tent AC shop can work on it if they are
willing.
If this is for your SDL then there is no evaporator cutoff switch as I
previously described - that would be present in your W123 or
It is the SDL car, thanks for the input. My next question is simpler; should
I have an A/C specialist do this testing work, or a garage that works mainly on
European Vehicles? I have both in the area.The garage that gave me my latest
input does not have the specialized A/C. equipment needed,
Pretty easy, acutally.
Check for voltage at the low pressure switch and a ground on one side
-- the PBCU grounds the signal from the Klima relay to switch the
compressor on.
If you have voltage and a ground, the relay is bad (usually cracked
solder on the actual relay) OR the low pressure
It's a fool's errand to repair a blower motor in a W123. Simply buy a used
one for $40 and swap it in. Better yet, get two.
On Wed, Dec 7, 2016 at 3:25 PM, Dan--- via Mercedes
wrote:
> Ralph,
>
> Since they were poking around in the vicinity of the heater box where your
> blower motor is locat
Ralph,
Since they were poking around in the vicinity of the heater box where your
blower motor is located, I would take a look at the compressor cut out switch
that's located on the heater box. It's a thermal switch with a capillary tube
that extends into the heater/evaporator box.
If you look
+1 Max beat me to it, and said it well. On my cars, KLIMA has always
been the failure. There is a place in FL who sells rebuilt Klima
relays. You can pull the klime and jump two terminals in the socket to
test if this is the problem. I use 12 ga solid copper house wire for
making the jumpe
Assuming this is the SDL. Sounds like the serpentine belt saving feature,
which cuts the compressor clutch power signal, is the issue.
In the KLIMA relay, the circuitry compares the compressor speed (from a sensor
on the back of the compressor) to the engine speed, and if they are too far
apar
There is a very specific ordered and detailed yet simple test for checking this
in the manual. If your shop has no clue what the cause is then they have no
clue. Is this the same shop that reversed the wiring? To answer your question
the problem is most likely the klima relay, could be the pbu,
Where are you Ralph? Let us find you a DECENT mechanic.
On Wed, Dec 7, 2016 at 2:35 PM, Ralph,'84TD via Mercedes <
mercedes@okiebenz.com> wrote:
> I had my A/C,heater motor brushes replaced and exerienced a problem after
> the wires were replaced in reverse. Had this fixed and now I have troub
On Wed, 7 Dec 2016 19:35:07 + (UTC) "Ralph,'84TD via Mercedes"
wrote:
> I had my A/C,heater motor brushes replaced and exerienced a problem
> after the wires were replaced in reverse. Had this fixed and now I
> have trouble with my compressor not kicking in. Had it checked out,
> but the ga
I had my A/C,heater motor brushes replaced and exerienced a problem after the
wires were replaced in reverse. Had this fixed and now I have trouble with my
compressor not kicking in. Had it checked out, but the garage cannot find what
is causing the problem. They tell me I have power at the f
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