Date: Sun, 11 Sep 2005 13:08:47 -0600
Reply-To: dusty edwards <dusty.edwards@MAC.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: dusty edwards <dusty.edwards@MAC.COM>
Subject: Re: AC Troubleshooting - No Blower
In-Reply-To: <779ef299d2fa75495ffbd9ad66e44606@mac.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed
thanks again for your help. after further research, i can provide a
bit more detail...
i'm doing this w/ the engine not running, however, nothing seems to
change when the engine is on. when the "thermostat" switch is turned
on (at all) it sounds like the blowers or something start to operate in
the overhead AC compartment (definitely nothing under the engine hatch
happens). but, like i said, nothing happens when i use the "fan speed"
switch. i've checked the two smaller fuses in the drivers-side pillar
and they're good. the "melt-away" fuse is also intact. i haven't
check anything further due to lack of a VOM meter.
dusty.
On Sep 11, 2005, at 12:36 PM, Kim Brennan wrote:
> Most late model Vanagon's AC systems consist of 2 switches. The one on
> the right, turns on the AC system, and controls the temperature
> (thermostat). The other controls the speed of the fans that blow the
> cooled air. However, the 2nd switch only controls speeds 1, 2, 3 or 4
> it does not completely turn OFF the fans (that's controlled by the
> right switch.
>
> In other words, when the AC is one, the blowers will always be blowing,
> unless you have a problem.
>
> When you turn on the AC the radiator fan is also supposed to come on
> (may not notice it above other noises in the Vanagon.)
>
> Now the blower fans have a fuse (each...there are two fans) which is in
> the drivers side D pillar. If your fans are blowing, get out your
> trusty Volt/Ohm Meter (VOM). With the AC turn on, check the voltage on
> the appropriate wires. back at that pillar. Check before and after the
> connector. It's possible that the connector has gotten water on it, and
> corroded slightly such that there is now resistance across that
> connector. If the resistance is sufficient, you won't have enough
> voltage to turn the fans. You'll also see browning at the connector due
> to the heat generated in the wires.
>
> If there isn't any voltage before the connector, then the problem lies
> elsewhere. Check the switches up front. The one that controls the AC
> and temperature has 4(?) connectors. One pair is simply on/off. Verify
> that it works. The other is a variable ohm resistor. Verify that the
> resistance does change as you turn the switch.
>
> If your fans are blowing, but the AC isn't cooling, it could be the
> variable ohm switch. Or it could be low refrigerant, or several other
> things. However, you really haven't explicitly told us enough
> information as to what your problem is.
>
>
> On Sep 11, 2005, at 1:39 PM, dusty edwards wrote:
>
>> here are the symptoms:
>> when the right switch is turned on, there is a click and sounds of
>> something running (is that the compressor?). but when i turn on the
>> fan switch, there's absolutely nothing. i've checked the rear
>> vertical
>> tunnel that houses the AC wiring and fuses, and everything looks
>> peachy. i believe that the only thing holding my AC back from
>> functioning is getting the blower to work - any idea what i can check
>> next...
>>
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