Heater blowing cool air...
04-13-2008, 01:13 AM
#1
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08 CLS63, Honda Accord, 04 911
Heater blowing cool air...
Just found out my heater isnt working today..AC seems to work fine, air flow seems to be fine, but I had both sides to at least 85 even on "HI" and no real heat at all....any initial ideas?
04-13-2008, 02:01 AM
#2
MBWorld Fanatic!
Sounds like the Duovalve is stuck. Signal to Noise has a write up on how to clean it. Scroll down the left side and click on Duovalve. Before cleaning the Duovalve, I'd check the heater core temperatures. There are two cores, and Signal to Noise explains how to check the temperature on those as well. Scroll to AC diagnostics part 1, and select that. If both heater cores are room temperature, I'd tap the Duovalve with a block of wood. If the temperatures rise, the Duovalve is sticking.
