rear screen heater/condensation.

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SoonerV8
Posts: 83
Joined: Tue Apr 17, 2018 3:24 pm

rear screen heater/condensation.

Post by SoonerV8 » Sat Nov 30, 2019 10:30 am

It's that time of year, damp and often cold, which have manifested two issues;
1. Condensation!! To me it seems pathetic that the owner of a modern car has to resort to a sock filled with cat litter!
2. The useless nature of the rear screen heater. I drove to a friends last night, 12 miles of rear heater and not one jot of difference. I double switched too. Hell I have a 50 year old MGB which clears a bigger rear screen in 10 minutes!!
Generally I love the car, but these niggles I find difficult to comprehend.
As an aside I thought I would check the fuse and the timer relay. Handbook.................useless! I gave up on that!
Petrol Sport Nav AWD 2018 UK Midlands.


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HouseSpider
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Location: New Forest

Re: rear screen heater/condensation.

Post by HouseSpider » Sat Nov 30, 2019 12:01 pm

It sounds like the rear heater is not working at all. Mine is evident to be working within a minute. The only niggle is that it doesn't switch off for at least 15 minutes.
Do your wing mirrors demist when it is switched on as they are all connected?
Sports Nav Auto Petrol 2017, 131bhp (chipped), Soul Red, Half Stone Leather, Safety Pack, Arm Rest, Auto Folding Mirror Kit, Detachable Tow Bar, HatchBag Boot Liner.
New Forest
50ish mpg


Gadgetman
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Joined: Sat Feb 11, 2017 12:54 pm

Re: rear screen heater/condensation.

Post by Gadgetman » Tue Dec 03, 2019 5:20 pm

My 2017 is exactly the same. Door mirrors heat up no problem, the rear screen works (just) but may as well not bother. As for the front screen, I have two 'cat litter' bags in there but still have to squeegie the inside unless I can spare 6 or 7 minutes to wait for it to have an effect.

In truth, it's enough of an issue to make me not consider another. And no, it isn't leaking.


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BWJ
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Location: Denmark

Re: rear screen heater/condensation.

Post by BWJ » Tue Dec 03, 2019 6:24 pm

HouseSpider wrote:
Sat Nov 30, 2019 12:01 pm
It sounds like the rear heater is not working at all. Mine is evident to be working within a minute. The only niggle is that it doesn't switch off for at least 15 minutes.
Do your wing mirrors demist when it is switched on as they are all connected?
rear heater can be set for 15 min. !

rear.GIF

CX3 2.0, Aut. Nav. Optimum SRC. 2019.


SoonerV8
Posts: 83
Joined: Tue Apr 17, 2018 3:24 pm

Re: rear screen heater/condensation.

Post by SoonerV8 » Wed Dec 04, 2019 11:18 am

Yes the door mirrors are pretty good at clearing, but as Gadget man said, the rear screen defogger is useless. Yes it is set to 15 minutes and, as I pointed out, even 30 minutes doesn't do it. You can actually see the heating elements have "warmed" up, but obviously not enough to heat the glass sufficiently.
"In truth, it's enough of an issue to make me not consider another. And no, it isn't leaking."
Those are my feelings too. I would happily sacrifice the heated steering wheel, the lane departure warning (which I turn off anyway) and the fairly useless SatNav, just to be able to drive on a cold damp morning without it taking me 15 minutes to demist the inside of the car first.
Petrol Sport Nav AWD 2018 UK Midlands.


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HouseSpider
Posts: 324
Joined: Thu Jan 11, 2018 11:47 am
Location: New Forest

Re: rear screen heater/condensation.

Post by HouseSpider » Wed Dec 04, 2019 2:25 pm

Weird! In the hard frost of yesterday my rear screen defrosted within 3 minutes. The wing mirrors are somewhat slower but do the job within 10 minutes.
I don't seem to get excessive inside condensation either. I wonder if it's anything to do with inefficient or faulty AC not extracting the moisture out of the air as it should.
Sports Nav Auto Petrol 2017, 131bhp (chipped), Soul Red, Half Stone Leather, Safety Pack, Arm Rest, Auto Folding Mirror Kit, Detachable Tow Bar, HatchBag Boot Liner.
New Forest
50ish mpg


santa
Posts: 244
Joined: Mon Oct 26, 2015 5:54 pm
Location: Denmark

Re: rear screen heater/condensation.

Post by santa » Thu Dec 05, 2019 12:03 pm

I have to say, that I also find the rear heater (and wing mirrors as well) the weakest I've ever had in a car.
It works but it's a fair bit slower than my previous cars.
Mazda CX-3 2.0 120HP Optimum Aut. in Jet Black, 2015.
http://www.spritmonitor.de/en/detail/721903.html


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