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Path: utzoo!watmath!clyde!floyd!harpo!seismo!hao!hplabs!tektronix!tekchips!terryl
From: terryl@tekchips.UUCP (Terry Laskodi)
Newsgroups: net.auto
Subject: Re: Toyota Heater problems
Message-ID: <644@tekchips.UUCP>
Date: Mon, 26-Mar-84 20:57:44 EST
Article-I.D.: tekchips.644
Posted: Mon Mar 26 20:57:44 1984
Date-Received: Wed, 28-Mar-84 01:12:52 EST
References: hplabs.2175, <2524@utah-cs.UUCP>
Organization: Tektronix, Beaverton OR
Lines: 19


     I think I know what the problem is, because my Corolla has the same
problem:

     In the back of all the gobble-de-gook for the heater, you'll notice
two copper pipes coming into/out of the compartment. These are the pipes
that supply/take away warm water from the heater. If you follow one of these
pipes, you'll notice it goes into another metal pipe that is T-shaped.
One branch of the T goes into the heater unit itself, and the other branch
looks like it goes somewhere behind the heater unit and somehow gets attached
to the other metal pipe leading out of the compartment. Well, anyways, back
at the T-junction, you'll notice a plunger with some sort of spring attachment
and some sort of lever mechanism. If you move the temperature lever on the
heater, you'll notice this spring/lever mechanism move back and forth. Now my
problem on my Corolla is that the plunger mechanism is either rusty or frozen
somehow, thus only one temperature comes out of my heater. I tested this
assumption by getting a pair of needle-nose pliers and manually moving the
plunger back and forth, and sure enough the air temperature of the heater
did change. Hope this helps some.