Interesting. Do you know if in a heat pump heated Leaf if it is the same compressor for both heat and A/C? I wonder if it uses one compressor to both cool and heat the defrost air, but probably with aid of the resistance heater of course. Maybe the compressor just stops working all together at a certain sub-zero temperature?jjeff wrote:No I realize the light comes on, but did the compressor? You might not be able to hear it from inside the car but whenever I've pushed the A/C button in extreme cold the light comes on but if you go outside the car you'll notice the condenser fan isn't running, and I'd assume by this that the actual compressor is also not running but I'm not positive.
My floor mat has been an ice rink for the past month! Literally, I couldn't step in the car without slipping! It's finally melted, so I guess that explains the foggy windows. I'll try taking the mats out and drying them.jjeff wrote:If your having bad fog problems and you live in a snowy climate I'd suggest using something like Weathertech or rubber floor mats. Snow getting on the carpet and melting really holds the moisture and then when you heat the interior of the car that moisture gets in the air and condenses on the windows.
I was having bad fogging issues when I first got my Leaf and it turned snowy, after I got the Weathertech floor mats(which I think are kind of overpriced but do work) and regularly wet vac them dry of standing water things are much better. It's my belief why ICE vehicles don't fog as bad is because they have so much more heat available that they are actually able to try out the carpet, not so much with a Leaf where heat is a precious commodity.
I don't know about Fog-X but I know with Rain-X your supposed to let the film dry before wiping it off, when I was using it I let it dry over night and wiped it off in the morning and it would probably be best to do this when it was above freezing although I don't know this for a fact.
The problem with recirc mode is that you will accumulate in the cabin the moisture from breathing.LeftieBiker wrote:The idea that recirculation and defogging are antithetical modes is not always correct. When the air outside the car is saturated with moisture - as in heavy rain for fog - the combination of A/C and recirculate (with heat as well, if the ambient temps allow) will dry the air out faster and keep it drier. The reason is that the air inside the car quickly becomes drier than the air outside; bring in a constant stream of wet air makes less sense than recirculating drier air, while continuing to remove more and more moisture from it. This was easy to prove in older cars with manually operated recirculate doors and separate A/C buttons, and I did so all the time. It's tempting to assume that the car manufacturers are idiots for not allowing this, but the more likely explanation is that they are practicing CYA when locking out recirculation in defrost/defog mode. Since there are many situations in which it is better to have the fresh air intake open, they make it mandatory.
Of course, once I discovered that the floor only setting will also allow some air to escape from the defroster vents, I was able to use 'partial recirculate' to make it more effective in damp weather by using A/C + Floor only. The only drawback is cold feet, and that can be solved by adding heat to the mix.