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Does the Rear Window Defroster Shut Off Automatically?

17K views 51 replies 11 participants last post by  zfrangi  
#1 ·
I turned it on this morning right starting my car and it stayed on the whole 20 minutes of my commute. Seems kind of excessive since the window was defrosted after 10-15 mins.

Also, off topic, but are the top 2 or 3 lines for the rear defroster or antenna or what? They didn't defrost the dew like the rest of the lines.

Matt
 
#2 ·
Mine doesn't shut automatically or at least if it does you have to wait waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyy too long - I didn't have the patience to do that. If it doesn't shut off auto - WTF - honda went way too cheap - this feature is on cars 15 years older and 3 times cheaper, don't see a reason why would they do that - you have to think of turning your rear defroster off and at the same time have a voice activated NAVI????? - seems like crap.

About the top lines - it is the stupid window integrated antenna - read your owners manual - it says it can take longer time to defrost there.
 
#4 ·
dude said:
Mine doesn't shut automatically or at least if it does you have to wait waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyy too long - I didn't have the patience to do that. If it doesn't shut off auto - WTF - honda went way too cheap - this feature is on cars 15 years older and 3 times cheaper, don't see a reason why would they do that - you have to think of turning your rear defroster off and at the same time have a voice activated NAVI????? - seems like crap.

About the top lines - it is the stupid window integrated antenna - read your owners manual - it says it can take longer time to defrost there.
Yeah, I could have checked the manual (I actually did skim most of it when I first got the car, but I don't have a photographic memory), but that's why I have you guys :D

About the rear defroster, I completely agree - WTF. I am really starting to regret my decision to get this car. I'm not blown away by the power like I was expecting and it's missing many of my favorite features of my 2000 Grand Am (auto on headlights when it's dark, engine oil life monitor, low windsheild washer fluid - many of which much cheaper cars do have) and I really didn't gain any features that I love (I like the factory installed mp3 player, but it's crappy how it's set up and I could have had an aftermarket one for about 60% less money). And now I find out that I manually have to turn off the rear defroster! I'm just glad I leased.
 
#8 ·
Gutterball said:
Mine doesn't shut off. I have a one hour commute every day and it doesn't turn itself off at all!! :/ Yep yep, what are you guys at Honda DOING?!
Funny that you guys think it's cheap of Honda, but I always hated on my Jetta when it shut off automatically and I had to turn it back on because the windows weren't totally cleared or started fogging back up.

When you look in your rear view and you can see, hit the button. Is that so hard?
 
#9 ·
sami said:
Funny that you guys think it's cheap of Honda, but I always hated on my Jetta when it shut off automatically and I had to turn it back on because the windows weren't totally cleared or started fogging back up.

When you look in your rear view and you can see, hit the button. Is that so hard?
I always figured (please correct me if I'm wrong) that the reason why it shut off automatically on the majority of cars was to extend the life of the wires going through the window. I'm sure you've all experienced when some of the wires die and then they don't defrost the window? Well, shutting it automatically would just extend the life longer in case you forget.
 
#10 ·
mtnagel said:
I always figured (please correct me if I'm wrong) that the reason why it shut off automatically on the majority of cars was to extend the life of the wires going through the window. I'm sure you've all experienced when some of the wires die and then they don't defrost the window? Well, shutting it automatically would just extend the life longer in case you forget.
You're probably right. I've never had any burnout problems, but I guess the potential could be there.
 
#11 ·
sami said:
Funny that you guys think it's cheap of Honda, but I always hated on my Jetta when it shut off automatically and I had to turn it back on because the windows weren't totally cleared or started fogging back up.

When you look in your rear view and you can see, hit the button. Is that so hard?
The defroster in my 93 Accord and Civic never shut off until the rear window was completely cleared. This 2004 seems to take longer to defrost as well.

Of course it's not hard, but it's not convenient and as someone mentioned, it's more unneccessary wear and tear.

I never said it was cheap, I think it's just an oversight. Just like how they have the power lock switch backwards (to most people anyway). When I take apart my doors to tackle those rattles, I'm going to see if I can rotate the switch around.

Lol, and back at you...if you saw that your rear window wasn't defrosted, you could just hit the button again :cool: :D
 
#12 ·
sami said:
Funny that you guys think it's cheap of Honda, but I always hated on my Jetta when it shut off automatically and I had to turn it back on because the windows weren't totally cleared or started fogging back up.

When you look in your rear view and you can see, hit the button. Is that so hard?
I agree 101% percent! I hated when in Buffalo I used it to melt an inch of ice on the rear window and the damned think in my 3.2 TL shut off every 10 min.
 
#13 ·
Guys, c'mon. :smash: Do you really think the rear window defroster doesn't shut off? There's no friggin' way. Just because the defrost light stays on the entire time means nothing. I think it's toggling on and off to avoid overheating the element.

Think about this: You turn on the autoclimate control and A/C comes on, but you can also feel it toggling on and off--even though the light remains lit. Also, you can put the heated seats on the HI position and they will toggle on and off to keep from overheating. (It states this in the manual.)

I can't cite you a paragraph and page from the owner's manual about the defroster shutting off (because I don't keep it here with me at work), but I'll bet my bottom dollar that it toggles on and off the whole time. I'll post a page number from the manual when I get home tonight, or else I'll happily eat my words in front of all of ya. :p
 
#14 ·
When you look in your rear view and you can see, hit the button. Is that so hard?[/QUOTE]

Not hard at all - the problem is when you forget it and you look in the rear window, since the window is OK you will forget to turn off the defroster - it is a common feature of the human brain - when you don't see a problem you don't think about it.

As far as I remember the Owners Manual, as well as the SERVICE Manual don't say anything for the light being on and wire shuffling from on and off position. There is just extensive explanation how to repair burned wire..... :D
 
#15 ·
DaveDB said:
Guys, c'mon. :smash: Do you really think the rear window defroster doesn't shut off? There's no friggin' way. Just because the defrost light stays on the entire time means nothing. I think it's toggling on and off to avoid overheating the element.

Think about this: You turn on the autoclimate control and A/C comes on, but you can also feel it toggling on and off--even though the light remains lit. Also, you can put the heated seats on the HI position and they will toggle on and off to keep from overheating. (It states this in the manual.)

I can't cite you a paragraph and page from the owner's manual about the defroster shutting off (because I don't keep it here with me at work), but I'll bet my bottom dollar that it toggles on and off the whole time. I'll post a page number from the manual when I get home tonight, or else I'll happily eat my words in front of all of ya. :p
Even if it does toggle on and off, that is still unnecessary wear and tear on the components of the system if it does that after your window is cleared off when compared to cars that shut it off after a set amount of time, don't you agree?
 
#16 ·
This car has auto-off headlights, auto-off seat heaters, auto-climate control, auto up down windows, 39 airbags, speed-synching window wipers, and yadda yadda yadda... I'm sure they didn't overlook the rear window defroster. :gapteeth:

Would toggling on and off cause unnecessary wear and tear? Well, I suppose, in theory, if the defroster is on for even one picosecond longer than it needs to be, that could be considered unnecessary wear and tear. But for something so trivial as the rear defroster, I'm going to put my full faith into the electrical engineers at Honda that designed this system. I'm going to ASSume that it's been engineered to provide years of trouble-free operation. :D This may be naieve of me. Only time will tell. :)
 
#17 ·
mtnagel said:
About the rear defroster, I completely agree - WTF. I am really starting to regret my decision to get this car. I'm not blown away by the power like I was expecting and it's missing many of my favorite features of my 2000 Grand Am (auto on headlights when it's dark, engine oil life monitor, low windsheild washer fluid - many of which much cheaper cars do have) and I really didn't gain any features that I love (I like the factory installed mp3 player, but it's crappy how it's set up and I could have had an aftermarket one for about 60% less money). And now I find out that I manually have to turn off the rear defroster! I'm just glad I leased.
You know, there is a name for those type of lights :)
 
#20 ·
dude said:
Hey let's blame Canada :) - the canadian models have those features like automatic headlights, washer fluid monitoring etc. and the american ones don't. Maybe they have automatic defroster too :D :D :D
Canada has DRL's not headlights that turn on automatically when the car senses that it's dark enough to turn them on.

tcador said:
You know, there is a name for those type of lights
And I'd say that a light that tells you when your windshield washer fluid is low so that you don't have to keep refilling it and so that you don't run out when you need it is more than an "idiot light". The same for a light that determines when you should change your oil based on engine revolutions, but takes into account temperature and load conditions to give a better idea of when it's necessary to change your oil as opposed to changing it at set intervals when driving conditions vary greatly from interval to interval. That seems pretty "smart" to me.

But I digress and I'm sure you will disagree.
 
#21 ·
mtnagel said:
Canada has DRL's not headlights that turn on automatically when the car senses that it's dark enough to turn them on.


And I'd say that a light that tells you when your windshield washer fluid is low so that you don't have to keep refilling it and so that you don't run out when you need it is more than an "idiot light". The same for a light that determines when you should change your oil based on engine revolutions, but takes into account temperature and load conditions to give a better idea of when it's necessary to change your oil as opposed to changing it at set intervals when driving conditions vary greatly from interval to interval. That seems pretty "smart" to me.

But I digress and I'm sure you will disagree.
I see you took my smiley away which shows that I was joking, anyhow...

To be honest, I don't need a light to tell me that my windshield washer fluid is empty, especially since that's the type of thing that runs out weekly :rolleye2: . Furthermore, if you depend on a light to tell you when you need to change your oil based on "engine revolutions", then by all means, you probably should pay the extra money for a car that does have that feature or complain about yours not having it. Afterall, how would you know when to change it?

BTW, without disagreement where would the fun be?
 
#22 ·
tcador said:
I see you took my smiley away which shows that I was joking, anyhow...

To be honest, I don't need a light to tell me that my windshield washer fluid is empty, especially since that's the type of thing that runs out weekly :rolleye2: . Furthermore, if you depend on a light to tell you when you need to change your oil based on "engine revolutions", then by all means, you probably should pay the extra money for a car that does have that feature or complain about yours not having it. Afterall, how would you know when to change it?

BTW, without disagreement where would the fun be?
The smiley got removed because I just copied and pasted from a previous post since I already had one quote on my post and I knew you were joking anyway, but I was just explaining my post further.

I understand that windshield washer fluid doesn't run out very often, but it usually happens at a bad time, say when it's slushy/snowy out and without it, all you are doing is spreading the dirty slush across your window makind it difficult if not impossible to see. Wouldn't it have been nice if your car told you a couple weeks before that time that you were getting low? I know it's not a necessity, but I think that's a great idea and I'm surprised more cars don't have it.

And interestingly enough, the car that had the features I spoke of above cost several thousand dollars less than my Accord, which lacks those features. And anyway, doesn't an oil life monitor that actually takes into account the driving conditions seem a little better than just going by when the oil companies tell you to change your oil?
 
#24 ·
Okay guys, I have the manual in front of me (for an '03) and, unfortunately, there's no conclusive proof one way or the other.

On page 79, it reads, in part: "The light above/in the button lights to show the defogger is on. It also shuts off when you turn off the ignition. You have to turn it on again when you restart the car."

I suppose one could interpret this to mean that it's always on, but I don't. I think that the "defrosting system" (that sounds dumb :rolleyes: ) is on when the light is lit up, but toggling on and off. Kind of like the cruise control system can be on without cruise actively engaged or the auto-climate can be on without the A/C like I said above.

I don't have that full-color "quick start" guide that the dealership hands you with the car for people that don't want to read the manual. Maybe it reads differently.

At any rate, without conclusive proof I say we're all correct. :cheers:
 
#25 ·
mtnagel said:
Canada has DRL's not headlights that turn on automatically when the car senses that it's dark enough to turn them on.

In the middle of the dash just below the windshield there is a plastic button which is supposed to be light sensor (in my 4-banger LX is just a piece of plastic and notin more)- and I'm sure of it since it is explained in the Service Manual. So I suppose some models have this feature (what I know for sure itis not on the american LX accords).

And I'd say that a light that tells you when your windshield washer fluid is low so that you don't have to keep refilling it and so that you don't run out when you need it is more than an "idiot light". The same for a light that determines when you should change your oil based on engine revolutions, but takes into account temperature and load conditions to give a better idea of when it's necessary to change your oil as opposed to changing it at set intervals when driving conditions vary greatly from interval to interval. That seems pretty "smart" to me.

Tottaly agree :up: