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Here is an interesting behavior that I saw last night on the MO. I completely understand how the HVAC operates.... or I thought I did. I started driving everything normal, pretty cold outside. OAT was 15°F I had the system on AUTO, set around 68°F. System was blowing nice warm air on the feet only.
Here is where is gets interesting.... after about 35 minutes I notice that now the MO is blowing on the feet AND defrost. Why? I don't understand. I thought that maybe my wife pressed a button so I pressed AUTO to ensure it was still in AUTO mode and it was and still blowing out the feet and defrost.
Strange... why would it do that.
On the return trip same starting conditions but a little colder 0°F.... started off on feet and after about 35 minutes it went to floor and defrost for the rest of the 55 minute trip.
Any ideas why it would start to blow out the defrost? Perhaps the MO is not only sensing temp but also humidity in the cabin? Now it couldn't be that advanced... but then again.
Here is where is gets interesting.... after about 35 minutes I notice that now the MO is blowing on the feet AND defrost. Why? I don't understand. I thought that maybe my wife pressed a button so I pressed AUTO to ensure it was still in AUTO mode and it was and still blowing out the feet and defrost.
Strange... why would it do that.
On the return trip same starting conditions but a little colder 0°F.... started off on feet and after about 35 minutes it went to floor and defrost for the rest of the 55 minute trip.
Any ideas why it would start to blow out the defrost? Perhaps the MO is not only sensing temp but also humidity in the cabin? Now it couldn't be that advanced... but then again.