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Discussion Starter · #1 ·
Hello, I have recently had a problem that my front and rear heated screens don't work, this problem is intermittent. I recently went for a service and they said my battery is at 50% and when it gets that low the car will shut off some functions to stop loss of battery. They said nothing wrong with battery itself when I suggested buying a new one, just said give it a good charge then it will be ok. I have charged it, and the problem still there. Although I've never charged a battery before and the lights didn't seem to go the whole way. I took it to a local garage to enquire about a new battery, they tested it and said there was nothing wrong with the battery. Has anyone else has similar problems with heated screens? I would have thought the car would shut the stereo or the climate control off before the function to actually clear your screen? Thank you.
 

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I am sure I have seen this on here before, and that you have to take the car for a run before it re-enables the high power accessories
 

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The Power Management shuts down the Heated Screens because they are a very high current draw until the battery reaches a pre determined state of charge.
 

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Discussion Starter · #4 ·
Thank you, yes I understand that but what I can't undersyand is that tha garage tester my battery today and said it was fine but they are still not working.
 

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Ha ha.Your battery may well be fine, it just needs a good charge.If you do a lot of short journeys the battery will never become replenished. An overnight charge or a long run should do the trick.
The garage may well be right; you could buy a new battery and the problem could return.
 

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True, i hear of so many people who are sold batteries they dont need.
 

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Andrea22
I have notice the quick clear heated windscreen is only really effective if run by itself. By that I mean, no interiorheating, no lights (other than the daylight runners) no aircon etc. You may then find the heater works fine.Mine from cold, normally takes about2 mins to clear a frostyscreen. I will say though, the rear screen heateris better.



hope this helps
 

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cianpars said:
True, i hear of so many people who are sold batteries they dont need.
yep its good that some company's are honest enough to say "no, that's not what you need". and you should go back to them in the future.

Edited by: Gremlin
 

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Andrea22 said:
Although I've never charged a battery before and the lights didn't seem to go the whole way.
a full charge of a battery will take many hours. ideally >10hr/ overnight unless its a wimpy charger or the battery is very flat when it may need more.
modern chargers* are designed to cutoff before 'over charging', however, certainly for the 1l ecobost engines the 'winter boost' should be the target charge
* lidl have their modern/clever chargers this week
 

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problem with heated screens

We have had exactly the same problem, always at the most inopportune times too. I was thinking of a new battery but won't bother now. Will just have to think of an excuse for a longer run out to recharge the battery more fully by the sounds of it.
It is really annoying especially on a day like yesterday when the windscreen kept freezing over as soon as I defrosted it.
 

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The systems power priority is starting the engine. Stop start will not enable until sufficient battery voltage is achieved. Cold weather brings down the battery charge and staring the engine will draw several hundred amps so even with a fully charged battery the heated front screen may only defrost half the screen to begin with.
If you are going to use the heated front screen, make sure all other electrical loads are turned off while the screen clears and then make sure you switch off the heated front screen.
 

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I had the same problem both screens not working so I changed the battery for a better quality one ( Exide superior ) from Euro car parts. I went for a 30 minute drive up the motorway and both heated screens now work fine. My old battery was ok never had the car not start etc but this new one has sorted the annoying screens not working problem. I got my battery on black Friday for under half price £53 !
 

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The systems power priority is starting the engine. Stop start will not enable until sufficient battery voltage is achieved. Cold weather brings down the battery charge and staring the engine will draw several hundred amps so even with a fully charged battery the heated front screen may only defrost half the screen to begin with.
If you are going to use the heated front screen, make sure all other electrical loads are turned off while the screen clears and then make sure you switch off the heated front screen.
The heated front screen has an auto off function. The rear does not.
 

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Never hurts to give your battery a trickle charge overnight once in a while during cold months, especially if you do a lot of short journeys, use heated screens, seats, wipers and headlights a lot.

Doing this can add several years of life to an ageing battery.
 
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