Front Windshield Defroster - Poor Performance

Eric L. · Nov 16, 2006

Had a look and a listen this morning - yeah you are right, the compressor clicks on the same time the secondary electric fan does. However, I did not have a 5 second / 15 second cycle, it was more random. Over two minutes, the compressor sometimes turned on for as long as 20 seconds, sometimes as short as 3 seconds, there didn't seem to be a pattern - but as joe says, its whatever it takes to keep the system pressurized.

Gonzo · Nov 17, 2006

As the car ages the compressor will run more due to leaks in the system developing. Then it will evendutally come to a point when the compressor is on all the time and you get nothing out of.

That will be a sad day for the MO.

njjoe · Nov 17, 2006

Gonzo said:
As the car ages the compressor will run more due to leaks in the system developing. Then it will evendutally come to a point when the compressor is on all the time and you get nothing out of.

That will be a sad day for the MO.

G-

With any luck, that will coincide with the day you are trading in the MO for another.

-njjoe

oregon2 · Nov 17, 2006

OK guys- we have been around the block once now and I am still searching for an answer. Here is what I know:

1) compressor and outside air functional when DEFROST on
2) might be plugged cabin filter - but at 10k miles- I rather doubt it
3) "If it is cooler (this time of year at least 20°F) then you have just **GOT** to stop making out in the car while driving. ............"
ELIMINATE THIS AS THE PROBLEM- THAT SHIP SAILED A LONG TIME AGO -BESIDES I AM NOT SURE WARRANTY WOULD COVER THAT

So where do we go from here --- except to the dealer......and you know what they are going to say.............

Eric L. · Nov 17, 2006

oregon2 said:
OK guys- we have been around the block once now and I am still searching for an answer. Here is what I know:

1) compressor and outside air functional when DEFROST on
2) might be plugged cabin filter - but at 10k miles- I rather doubt it
3) "If it is cooler (this time of year at least 20°F) then you have just **GOT** to stop making out in the car while driving. ............"
ELIMINATE THIS AS THE PROBLEM- THAT SHIPPED SAILED A LONG TIME AGO -BESIDES I AM NOT SURE WARRANTY WOULD COVER THAT

So where do we go from here --- except to the dealer......and you know what they are going to say.............

Does the windshield clear faster if you manually turn the fan to max?

oregon2 · Nov 17, 2006

Eric L. said:
Does the windshield clear faster if you manually turn the fan to max?

Turn the TEMP UP....... Turn the FAN to hurricane speed .......the results are the same: a half defrosted window.:1:

Eric L. · Nov 17, 2006

oregon2 said:
Turn the TEMP UP....... Turn the FAN to hurricane speed .......the results are the same: a half defrosted window.:1:

Its really hard to say whether the MO's defogger is just weak, or you've got some serious moisture on the windows. How about opening the windows? When my windows are really fogged up, I'll open the windows to speed up the defogger, but then I've done this on all the cars I've driven, not just the MO.

oregon2 · Nov 17, 2006

Eric L. said:
Its really hard to say whether the MO's defogger is just weak, or you've got some serious moisture on the windows. How about opening the windows? When my windows are really fogged up, I'll open the windows to speed up the defogger, but then I've done this on all the cars I've driven, not just the MO.

I have done that in the past also- the problem the last time this happened was that it was raining so hard that opening the windows even a little bit was asking for trouble.

hfelknor · Nov 17, 2006

I've had my share of problems with My Murano.
7 "failures" in the first 3 years. (Glad I bot the extended warranty)

And I believe that occasionally we (Florida) have some fog that "might" be equal to Oregon.

I have never had a problem with the Murano's defroster. Ever.

BTW, I have had many, many automatic climate controls (Going back to my 1959 Cadillac and continuing to my last car, a 1997 Town and Country)) and in my opinion, the Murano's climate control is top shelf.

And you seem to have had good luck with many other cars in the same area........

Don't know if you can convince the dealer, but it would seem obvious to me that you have a problem with your specific Murano.
I would assume that the A/C and/or the moveable vents are not working properly.

Homer

Kris · Nov 17, 2006

3.5 year, 66k miles, never a slightest problem with Murano fogging.....

Gonzo · Nov 17, 2006

Can you take a picture of HVAC panel when you are trying to defog it... sorry but a picture may help.

Also do you have large amount of moisture in your car, like wet seats, floor matts, perhaps falling cleanup items such as wet leaves?

Tyler_Canada · Nov 17, 2006

Also, can you feel lots of air coming out of the vent when they are on?

Regarding recirculate mode, that is definitely NOT on in defrost mode (not possible, the intake for the recirculate is the defrost vents)

njjoe · Nov 17, 2006

O2-

Since nothing else seems to work, I am going for the "longshot".

If the A/C condensate drains were blocked, then it is possible you would have a pool of water in the HVAC airbox. The airflow would pick up moisture from the entrained water and it would condense on the windshield. So while you are defogging the glass the HVAC system is adding to the problem.

I had this happen on a previous car, but I am not sure if the configuration of the MO's airbox would support such a condition.

When you park the car after driving with the A/C on do you see a puddle of water form under the car in the area of the front passenger-side footwell? If you do, then this longshot idea "doesn't hold water".

However, if there is no water under the car, then we may be on to something.

-njjoe

njjoe · Nov 17, 2006

Originally posted by Tyler_Canada
Regarding recirculate mode, that is definitely NOT on in defrost mode (not possible, the intake for the recirculate is the defrost vents)

Tyler_Canada-

You are mis-informed. The intake for the recirculated air is not the defrost vents. The intake is behind the dash on the passenger-side of the MO.

-njjoe

RayH · Nov 17, 2006

You may still want to check the cabin filter. On another car I've seen mice somehow get into both the engine air intake and passenger air intake and build nests clogging things up.

Also in the Audi A6 my Murano replaced, the second sealed firewall's drain plug would sometime get clogged filling up the firewall with water and eventually spilling into the passenger air intake. Not saying that's what's happening but water in the intake will definitely cause defrosting problems and in most cases make it worse.

Tyler_Canada · Nov 19, 2006

njjoe said:
Tyler_Canada-

You are mis-informed. The intake for the recirculated air is not the defrost vents. The intake is behind the dash on the passenger-side of the MO.

Very interesting, thanks for that picture. I guess I made an assumption based on where I felt the air going and the fact that you can't use defrost in recirc mode.

Dinples6789 · Nov 21, 2018

Can you help me? I have recently had a lot of frost on outside window - takes awhile two to frost this morning took me 10 minutes plus on the inside of the windshield some drops of water fell down . Never had this happen before in there 10 years I’ve owned my 2007 Murano

njjoe;94020]O2-

Since nothing else seems to work, I am going for the "longshot".

If the A/C condensate drains were blocked, then it is possible you would have a pool of water in the HVAC airbox. The airflow would pick up moisture from the entrained water and it would condense on the windshield. So while you are defogging the glass the HVAC system is adding to the problem.

I had this happen on a previous car, but I am not sure if the configuration of the MO's airbox would support such a condition.

When you park the car after driving with the A/C on do you see a puddle of water form under the car in the area of the front passenger-side footwell? If you do, then this longshot idea "doesn't hold water". <img src="http://www.nissanmurano.org/forums/images/smilies/tango_face_grin.png" border="0" alt="" title="Big Grin" class="inlineimg" /> However, if there is no water under the car, then we may be on to something.

-njjoe[/QUOTE]

Dinples6789 · Nov 21, 2018

Still not sure how this site works and replying and don’t you get notification someone replies??? I’m not sure about water under car in summer - I think there may be some.

E=Dinples6789;733216]Can you help me? I have recently had a lot of frost on outside window - takes awhile two to frost this morning took me 10 minutes plus on the inside of the windshield some drops of water fell down . Never had this happen before in there 10 years I’ve owned my 2007 Murano

njjoe;94020]O2-

Since nothing else seems to work, I am going for the "longshot".

If the A/C condensate drains were blocked, then it is possible you would have a pool of water in the HVAC airbox. The airflow would pick up moisture from the entrained water and it would condense on the windshield. So while you are defogging the glass the HVAC system is adding to the problem.

I had this happen on a previous car, but I am not sure if the configuration of the MO's airbox would support such a condition.

When you park the car after driving with the A/C on do you see a puddle of water form under the car in the area of the front passenger-side footwell? If you do, then this longshot idea "doesn't hold water".

However, if there is no water under the car, then we may be on to something.

-njjoe[/QUOTE][/QUOTE]

Front Windshield Defroster - Poor Performance

Eric L.

Gonzo

njjoe

oregon2

Eric L.

oregon2

Eric L.

oregon2

hfelknor

Kris

Gonzo

Tyler_Canada

njjoe

njjoe

Attachments

RayH

Tyler_Canada

Dinples6789

Dinples6789

Top Contributors this Month

Recommended Communities