Re: heater temp control switch question - Saab 900 Bulletin Board - Saabnet.com
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Re: heater temp control switch question
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Posted by Dan W [Email] (more from Dan W) on Wed, 18 Oct 2000 21:05:17 Share Post by Email
In Reply to: heater temp control switch question, Sean, Wed, 18 Oct 2000 20:38:37
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It's likely your heater valve is going south. This is a well documented problem in saabs - the valves fail by either stiffening/seizing (sounds like yours is trying to do this), spinning freely (something was sheared off), or leaking coolant onto the drivers-side floor (in the only bad incident I ever heard of on TSN, a valve catostrophicly "blew" and the spraying hot coolant burned the drivers legs - ouch).

You've three options (from bad to good):
1. Let it go. However, when it finally breaks, you won't be able to adjust the heat - it will stay in whatever position it was forever, be it hot or cold.
2. Have a shop replace it (my former shop charged ~$250, toooo much $$$)
3. Replace it yourself. You can buy the part for about $75 from any TSN sponsor. You can find great directions for doing it in the FAQ, requires only basic tools and a ball-tip hex wrench. It's not difficult, but takes a couple hours for the first-timer. I just did mine for the first time two weeks ago.

Good luck,
Dan W
'85 900S 173k

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