Hi all,

 

First time I've had a frost since getting the car. Thought "Oooh 10 mins with the windscreen on 40 degrees no problem". 20 minutes later nothing has happened, and I've finally realised that hardly anything comes out of the top dash vents when it's on full. There's the normal fan noise but no flow.

 

Are they always like this? or I'm thinking some magic flap motor thing isn't working so my air isn't being directed to my screen... which probably means dashboard out to fix lol.

 

Cheers

You will get nothing at 40 degrees until the engine temp has reached 40 degrees, you need to set it to a lower temp first as the flap will not open till it has reached the temp set.

I set mine at about 20deg then build up in steps, doesn't take long.

If the aircon was working well it should clear misting on auto as the chiller has the effect of dehydrating the interior but its true that no heat can come till the engine is well warmed and just sat ticking over its too well cooled to warm up fast. The flaps are automatically controlled. Also if there was a frost then sub zero locks out the aircon compressor to protect it.

Hi,

 

Yeah it was a frost. I ended up heating up the cabin to the point the windscreen defrosted that way. Even warmed up an hour later there was little coming out the dash I think... I'll try again tonight.

 

So in summary "yes it should be good" and "no yours appears not to be working" ;)

Hi,

Did you press the windscreen demist button, or just have it on Auto?

On demist, air is directed at the windscreen and also blows over my head, to demist the rear window without using the rear window heater!.

As stated earlier, best to set it to a lower temperature to start, so you then get dry refridgerated air as well!

Jez.

does'nt it depend on the year cos i'm sure after 94 you've got directional choice.

All series II Z32's (made after 1992) have directional choice. I know my blue 94 has but both my 92 and my 90 don't yet. but will have because the Auto buiness it pants.

 

Yes the best way to defrost is leave it on 20 on auto ans it will clear quite quickly.

 

I've done this myself. Stuck it on 40 and screen and it took about 25 minutes. Definately not one of Mr Nissans finest ideas.

It's just definitely not working, when the car is running tonight and warmed up after i get home before i switch it off I'll pop it on 20 and windscreen (not auto) and see if any air comes out then :) Nice idea about defrosting the rear without using the rear demister.

 

Wonder if you can get a screen with the demister wires like you can for a 240 Jez??

 

Cheers

It's just definitely not working, when the car is running tonight and warmed up after i get home before i switch it off I'll pop it on 20 and windscreen (not auto) and see if any air comes out then :) Nice idea about defrosting the rear without using the rear demister.

 

Wonder if you can get a screen with the demister wires like you can for a 240 Jez??

 

Cheers

 

it will depend on the temp of the car interior in relation to the temp setting as to what temp the air will be. It is a full climate control system and has sensors in all the heater ducts and an interioe sensor in the rof pannel by the map reading lights. So if the roof sensor is reading the car's internal temp as 22 and you set the screan temp at 20 the sensor will make the air colder to bring overall temp down to 20 before it blows at twenty.

 

It is as most things on the Zed. Too over complicated and that is why the control was given back to the driver on the series II's.

 

How long you had your car? Just wondered if someone had done a heater matrix bypass? You certainly have no warm air if that was the case.

The demisters are superb I NEVER had a problem whether the car was warm or not :confused: Temperature setting shouldn't affect anything if its set to demist rather than auto....

Hi,

Having the recirc button pressed can also make the interior fog up after a while.

I tend to use the demist button more when the engine is cold, as on the Auto setting, you get cold air blown down at your feet as well!

Jez.

Right lets just clear a few things up

 

I'm not using auto, but the windscreen button :)

Ice is the problem, not misting up, if i'm in a hurry I use the aircon to clear that

The heaters general work very well :)

The problem is not the heat, it's a distinct lack of airflow from the top of the dash, i.e. none. There is some (not much) coming from the front exits though as if it's leaking there.

 

I do have a sensor from a heater pipe hanging around in my footwell though that fell out. I meant to upload a photo to see where it had come from :)

 

We shall see, I'm pleased to hear at least that it should be good :)

The demisters are superb I NEVER had a problem whether the car was warm or not :confused: Temperature setting shouldn't affect anything if its set to demist rather than auto....

 

I have to agree with Andy......

 

.......Never had a problem with the ZX misting up inside :bow: . Now my SLK that's another matter - absolute rubbish until the car warms up a bit :mad:

 

Richard :smw:

Right lets just clear a few things up

 

I'm not using auto, but the windscreen button :)

Ice is the problem, not misting up, if i'm in a hurry I use the aircon to clear that

The heaters general work very well :)

The problem is not the heat, it's a distinct lack of airflow from the top of the dash, i.e. none. There is some (not much) coming from the front exits though as if it's leaking there.

 

I do have a sensor from a heater pipe hanging around in my footwell though that fell out. I meant to upload a photo to see where it had come from :)

 

We shall see, I'm pleased to hear at least that it should be good :)

 

You're trying to get rid of ICE with the demister???

Yeah eventually it softens a bit, not ice, more a bit of a frost.

 

I tried it when I got home. Car warmed up I press the windscreen button next to auto and no air comes out at all, nothing. That was at 26deg with fan speed three. Some warm air did come out from the top of the centre panel vent though... I guess what's happening is it's not redirecting it to the screen properly?

Sounds like the mode doors need some attention - the bits that control where the air is directed

Indeed :( Do you know where abouts I should hunt for that please? I might have a z32 manual around somewhere but I don't think so. Don't fancy removing my dash really lol. I'll try behind the centre console to start.

I think dash removal is the only way. Conzult will allow you to check the operation of the mode doors before you go to this extent though...

What a clever car, thanks for that heads up. Best get myself sorted with some conzult or similar setup.

 

Cheers

Take a look at the Self Diagnostic Procedure >> http://www.300zx.co.uk/cgi-bin/manual.cgi?list=ha&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=118&design=default&total=168 See following pages as well!!

 

Then go to the lower part of this page (continues on the next page) to find out where to find the relevant fault procedure >> http://www.300zx.co.uk/cgi-bin/manual.cgi?list=ha&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=112&design=default&total=168

 

HTH

 

Dave

That's fantastic Dave I'll play with that on the weekend, and then I'll remove my dash lol.

 

Thanks both of you for your help!

 

(BTW I'm a programmer by trade, was thinking of writing my own conzult but I'm at a bit of a loss on where to start, if either of you know of some resource on how the connection works let me know!) :)

 

Cheers

Woah I see there is diagnostics for everything!

 

Would having conzult or something similar allow me to run ALL the diagnostics for the whole car easily? I'd be interested to know what everything that can be tested is up to, makes we want to write my own even more! Would be pretty handy...

You can buy it ready made..... DTA sell the ConZult which does pretty much everything (I think) there is also DataScan, which is a lot cheaper, but doesn't do as much.

Personally if you have the money I'd recommend the ConZult, as it is by far superior to the DataScan (I've had both, and sold the ConZult :headvswal wish I hadn't now)

 

That's my opinion anyway.

 

Incidentally, I wasn't trying to out-do Andy, as his info is spot-on :D :bow:

Don't think datascan gives you any access to the diagnostic controls that the conzult does..

 

For DIY consult - http://www.plmsdevelopments.com/diy_consult.htm

 

Not sure on full functionality though...

Incidentally, I wasn't trying to out-do Andy, as his info is spot-on :D :bow:

 

Come off it we all know what you've said about Duff info that Andy fella dishes out. :slap: :rofl: