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Intermittent heat in 1993 940 900 1993

posted by  lrisius on  Mon Oct 19 04:25 CST 2015
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last visit: Sun Aug 17 05:59 CST 2014
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Thanks Trichard. I'll try to collect more observations if it continues to have issues. If it fails, I will confirm vacuum supply by changing from defrost to vent and/or recirculate. I haven't noticed any control issues with the AC system. The coolant system hasn't been touched for a while, at least months so I don't think an air bubble is very likely. I think the heater acted up like this a little last winter but it was very intermittent.

I'm trying to understand how the heating side of the control unit works. Are there any failure points in the control unit that could explain this?






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New Intermittent heat in 1993 940 [900][1993]
posted by  lrisius  on Sat Oct 17 05:36 CST 2015 >


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