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Heater blows cold... most of the time

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Posted by: Swoll50

Hi. I have a 93 SDV that blows cold almost all of the time. It's been doing this all season, except for about a 1 minute spot a couple nights ago where it blew warm. Any ideas?

Posted by: kissedvfd

My first thought was that the coolant level is low. This starves the heating coil of coolant and thus no heat. You would have noticed a cooling problem by now if this was the case.

Second thought was the temperature door actuator. If memory serves, there is an actuating rod behind the glove box that has a little plastic adjustable keeper that will strip out. Sometimes the temp door is binding and you'll have to disassemble the whole thing to free it up.

Good luck!

Posted by: Wicked_LS

Id say your heater core is going bad

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