240/1991 keeps heating

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Bluefox - 21 Jun 2004 11:49 GMT

hello,
there is always some mild heat comming out of the left and right heater
outlet. Altough the command is set "cold". So I guess the valve is not
operating properly. Is it easy to replace? Or has the car been built around
it like the fan housing? What would be the right procedure to replace the
valve?

thanks for the info

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Mike F - 21 Jun 2004 18:50 GMT

> hello,
> there is always some mild heat comming out of the left and right heater
[quoted text clipped - 4 lines]
>
> thanks for the info

The valve is located just to the right of the gas pedal, behind the
plastic panel. First make sure the cable is adjusted properly, so the
valve actually clicks closed in the cool position. With the plastic
panel off, move the lever and see what is operating, and in what
direction. Loosen the screw pinching the cable, and see if the lever
will move more in the 'cool' direction. If that's working OK and you
still have heat, you can tighten the screw (sealed with paint) on the
end of the valve about a quarter turn try to make the shutoff more
positive.

Signature

Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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Bluefox - 21 Jun 2004 20:27 GMT

Thanks Mike,
What if the valve clicks in cold position? Membrane broken?
I have a spare valve wich is OK. I think I'll try replacing it right away.
Thanks again!

> > hello,
> > there is always some mild heat comming out of the left and right heater
[quoted text clipped - 22 lines]
> Replace tt with t (twice!) and remove parentheses to email me directly.
> (But I check the newsgroup more often than this email address.)

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Mike F - 22 Jun 2004 13:34 GMT

> Thanks Mike,
> What if the valve clicks in cold position? Membrane broken?
> I have a spare valve wich is OK. I think I'll try replacing it right away.
> Thanks again!

If you can feel the click, then the seal just may be a little
compressed. Tightening that screw I mentioned will allow the seal to be
compressed a little more.

Signature

Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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brackenburn - 22 Jun 2004 18:30 GMT

Hi Mike,

I seem to have the same problem ( heat on all the time), but am unable to
access the heater valve as you describe.
On removing the plastic panel, and the knee bolster, I find that the heater
valve is buried behind two coolant pipes running transversely (pointing
outward, to the left). I can see the control wire moving and the attached
arm, but not the cable clamp.

There is no "click" on moving the control to full cold.

An earlier model 240 had access as you describe. It had no Air Conditioner.
My present model ('93 240 Classic) has Air Conditioning. Any ideas on how
to get at that heater valve?

Thanks.
Andy I.

| > Thanks Mike,
| > What if the valve clicks in cold position? Membrane broken?
[quoted text clipped - 4 lines]
| compressed. Tightening that screw I mentioned will allow the seal to be
| compressed a little more.

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Mike F - 23 Jun 2004 13:18 GMT

> Hi Mike,
>
[quoted text clipped - 13 lines]
> Thanks.
> Andy I.

Right, 91 was the last year of the old type valve that I described. And
91 was the year of the original poster's car. The new type valve
doesn't have the adjustments that I mentioned, and I've never worked on
one of them. All you can do is make sure that the cable is connected
properly, and the valve freely moves thorough it's whole travel. The
new valve also doesn't seem to have as positive of a shutoff.

Signature

Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

Reply to this Message

brackenburn - 23 Jun 2004 18:11 GMT

Thanks Mike.

Andy I.
Brentwood Bay (near Victoria), BC.

| > Hi Mike,
| >
[quoted text clipped - 20 lines]
| properly, and the valve freely moves thorough it's whole travel. The
| new valve also doesn't seem to have as positive of a shutoff.

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