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Re: How to test the heater thermostatic control? 200 92

Those old-style valves were replaced by the new onoff-valves for several reasons. Of most importance: the old valves are notorious for leaking. Both externally and internally (you wonīt be able to shut off the heater completely). The thermostat functionality also is marginal, to say the least. Iīd guess yourīs isnīt broken, it just ainīt able to compensate for more than extremely small temp changes. Iīve driven several Volvos with that kind of valves and they have always failed. Nowadays you get a rebuild kit with the new style valve when you go to the dealer with your old car.

IMO itīs not worth the possible trouble putting that old thing in there. And did you check your heater out - since youīve got the new design there might not be any predrilled holes for the temp sensor any more...

/Martin






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