That sounds about right, my focus has a 7 min cut-off for each window heater but a 3 minute cutoff if you're using both at the same time. Though the manual states this is to prevent thermal shock fractures to the glass (!)
Hamish Freeman wrote: > Whilst not being able to answer the question outright, the heated > front screen Ford harness is in 30 amp wire and the switch includes a > timer for ~7 min operation so obviously Mr Ford decided that the > current draw was too much for continuous use. My screen melts a 2-3 > mm covering of ice outside and ~ 1 mm covering inside within 30 secs > (which is really useful) but leaves the screen covered in water > and the central area untouched hence the earlier comments.. I do not > have either an amp-eater (difficult with an alternator other than very > old moving iron type) or any voltage indication fitted so cannot > comment further. > > Hamish > > ----- Original Message ----- > *From:* Administrator <mailto:[email protected]> > *To:* quantumown...@googlegroupscom > <mailto:[email protected]> > *Sent:* Wednesday, December 31, 2008 11:15 AM > *Subject:* [Quantum Owners] Re: Rear Screen de-misting > > > > Andy, > > I find my soft top is quite water tight as well. I did wonder if an > MX 5 glass rear screen (or similar) could be made to zip into a > replacement hood for the 2+2? > > I understand you need air blowers for de-misting on a car with a > full > screen for SVA/MOT. Does the heated element front screen overcome > that requirement? I wonder what the Amp draw in those are? > > I find that on the frosty days you still need to warm the screen to > stop it misting up, even with the top down. Though I do drive hood > down on any good day through the year. My favourite times are hot > summer evenings after the sun has gone down and the cold winter days > in the sun. Can't beat it. > > Derek > > > On 31 Dec 2008, at 08:35, Andy Haworth wrote: > > > > > Back in the days of when I drove my car, I'd use a silicon blade > on > > the rear > > screen inside and out. The sort of thing you'd use to remove > excess > > water > > after giving the car a wash. The soft top on mine seems to be > better > > at > > keeping out water than the hard top (which had a heated rear screen) > > > > There was a raft of heated front screens that came out of a couple > > of forums > > group buys, I've seen one go on ebay and I think Jim was looking > at > > one as > > well > > > > If you're brave I suppose you could always go top down! There's an > > MX-5 > > locally that unless it's raining, it's driven with the roof off. > > > > > > > > Andy > > > > -----Original Message----- > > From: quantumown...@googlegroupscom > <mailto:[email protected]> > [mailto:[email protected] > > ] > > On Behalf Of Bob Craig > > Sent: 31 December 2008 08:32 > > To: Quantum Owners Group > > Subject: [Quantum Owners] Re: Rear Screen de-misting > > > > > > Hi Derek, > > Not tried it but don't see why not, just be careful that you are not > > going to drain the battery if you have a front and rear heaters, > > lights, etc all on and are only doing 11 miles. Some of these demist > > heaters can draw 14amps (page 54 of CBS catalogue) , so make > sure your > > charging circuit is in tip top condition although I assume you will > > only use them for a couple of minutes rather than driving the > full 11 > > miles with them on. > > > > If your car is close to your house or garage you could run an > > extension to it and use a 240v heater for a couple of minutes before > > you leave. That would have the same effect but not drain your > battery. > > A bit simplistic but less hassle. > > > > Bob Craig (Q2-267) > > > > On 30 Dec, 22:41, Administrator <[email protected] > <mailto:[email protected]>> wrote: > >> I've just been driving the 2+2 in the cold today. I work 11 miles > >> away from home. That means I am spending half of the time on the > >> journey to work with the car warming up. Difficult when it is > >> freezing. I used a mod I had done a few years ago but is very > nice > >> at > >> this time of year. The soft top window has a 12V fan heater > directed > >> onto it and mounted to the rear bulkhead so the top still > folds. It > >> works and adds a little early heat to the car straight away. > So de- > >> misting/de-frosting on a plastic window can be done. I have been > >> thinking of adding wired electric de-misting for the front > screen as > >> It would work straightaway without warm up as well. I have > seen some > >> units that are SVA' able. Anyone else tried this? > >> > >> Derek > > > > > > > > > > > > ------------------------------------------------------------------------ > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.176 / Virus Database: 270.10.1/1868 - Release Date: > 29/12/2008 10:48 > > > -- > This message has been scanned for all known viruses and threats by > Policymail. 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