Honda Odyssey Forum banner
1 - 6 of 6 Posts

·
Registered
Joined
·
588 Posts
Discussion Starter · #1 ·
I did my search, and I understand how the electronic AC works. However, I did not find the answer to this question.

Let's say we set the AC to auto, or even just turn it on. The AC seems to kick in. I understand it also works as a dehumidifier.

Since is winter, the Heat is running. There is no need for cold air.

Does that system smart enough to turn the AC off? Will it turn off once the humidity level is good?
 

·
Registered
Joined
·
2,604 Posts
From what I've seen, it pretty much cycles the A/C constantly regardless. Doesn't mean it's producing cold air....but it's dehumidifying. I tend to just manually turn it off and on in the winter. Pretty much all new vehicles are doing this...I'm not a fan (pun intended).
 

·
Registered
Joined
·
3,163 Posts
The system is smart enough to turn the AC on. Dehumidification is needed more in the winter than the summer as people put out a lot of moisture. This mainly stops window fogging. It also extends the life of the compresser seals. By leaving it off all winter the shaft and seals expand and contract all winter. That was always a problem and all manufacturers advised to turn it on once in a while in the winter. It also keeps the bearings lubricated. The best thing you can do to increase the life of the AC is to leave it in auto. Mine stays on and the only thing I change is the temperature.
 

·
Registered
Joined
·
119 Posts
likely a dumb question, but...

would I be correct in understanding that the use of AC in auto mode year-round affects:

- wear on compressor/bearings
- tensioner/pulleys perhaps (or are they always running anyways)
- interior humidity
- engine load
- performance
- fuel economy (seems like a net 1-2 mpg)

Using AC itself does not affect the "charge" (level of refrigerant or ability to cool) unless you have a system leak.

Thanks.
 

·
Registered
Joined
·
3,116 Posts
There are 2 sources of moisture causing fogging inside the car:
1. Outside humid air being sucked inside: usually when temp is above 32F. More moisture in Spring, Summer.
Below 32F, water vapor condenses and there is very little moisture in the air.

2. Human respiration: in such a small environment of the van cabin, if there are 7 passengers breathing, there will be some moisture produced.
- The car/van sucks air from inside, warms it and warm air enters cabin.
In all cars, there is a "discharge" duct hidden somewhere in the rear of the car so air can flow to the back of the car to outside.
- A trick to get rid of excessive moisture is to open the windows a bit (maybe 1-2 inches), this helps get rid of moisture.

In some vehicles, the outside temp sensor controls the AC too. For ex, if temp is below 25F or so, it shuts off the AC because at that temp of 25F, there is really no need for AC.

This "magic" temp (temp at which AC stops working) varies from vehicle to vehicle.
 
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top