Date: Sun, 11 Sep 2005 14:36:15 -0400
Reply-To: Kim Brennan <kimbrennan@MAC.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Kim Brennan <kimbrennan@MAC.COM>
Subject: Re: AC Troubleshooting - No Blower
In-Reply-To: <913bf2902c0de487f7660b72ca9d5b01@mac.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed
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...
|