12v heater
Author
Discussion

Wokingwedger

Original Poster:

1,030 posts

235 months

Sunday 11th December 2022
quotequote all
Are any of the plug in 12v heaters at least any good for helping defrost a windscreen ?. I know they can’t add more than 100 Watts or so, but with a 3 litre diesel the heat takes ages to come through.

Scrump

23,947 posts

188 months

Sunday 11th December 2022
quotequote all
No

sherman

15,303 posts

245 months

Sunday 11th December 2022
quotequote all
Pair of gloves and an ice scraper will be quicker and cheaper.

Also wont drain your battery unexpectedly.

littleredrooster

6,412 posts

226 months

Sunday 11th December 2022
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Bro-in-law bought one a while back, found it was useless so reverted to his previous method of putting a couple of old-fashioned hot water bottles on top of the dash while he ate his breakfast.

anonymous-user

84 months

Sunday 11th December 2022
quotequote all
100W is going to achieve fk all.

Many diesels from the mid range up actually have a roughly 1KW PTC electric element in the climate control system anyway to get lukewarm air coming out early, I've had a few cars with it and can't say I've noticed much of a contribution but 1KW doesn't go very far when ingesting air at 0C in any volume.

Draxindustries1

1,657 posts

53 months

Sunday 11th December 2022
quotequote all
The 100w fan heaters are really not much use.
Fitted to MrsD's Transit day van is a Webasto night heater. The digital timer can be set for instance 30mins before you want to set off. Very handy in the winter , windows clear and toasty interior. It was fitted as an option but can easily be retrofitted..

Wokingwedger

Original Poster:

1,030 posts

235 months

Sunday 11th December 2022
quotequote all
Yes, I suspect my car may have some sort of aux heater, as it has a front screen button like the rear screen, but it’s not impressive !

Speed addicted

6,329 posts

257 months

Sunday 11th December 2022
quotequote all
Bottle of warm (not boiling) water poured over the screen, defrosts inside and out.
Job done.

sixor8

8,616 posts

298 months

Sunday 11th December 2022
quotequote all
I've done this for years. Well done for pointing out warm, NOT boiling.

I would add that you should turn on the wipers once the blades are free and wipe the screen dry. Otherwise as soon as you start off, wind chill will re-freeze the screen. I see this a lot. eek

Another tip Is to turn the ignition off with the wipers in the up position and trap a bin liner. In the morning, pull it off, hey presto dry screen. smile Only works if it's dry weather of course. rolleyes Otherwise the bin liner gets frozen to a wet screen. frown

98elise

32,740 posts

191 months

Sunday 11th December 2022
quotequote all
Wokingwedger said:
Yes, I suspect my car may have some sort of aux heater, as it has a front screen button like the rear screen, but it’s not impressive !
Surely thats just a heated front screen? Fords have had them for a couple of decades.

Escort Si-130

3,457 posts

210 months

Sunday 11th December 2022
quotequote all
sherman said:
Pair of gloves and an ice scraper will be quicker and cheaper.

Also wont drain your battery unexpectedly.
A 2 litre bottle of room temperature water is best. NOTHING does it faster than this. I would NOT use a scraper, leaves marks on your windscreen, if you do not care about the car or go to £5 car wash boys, then go for it.
I have NEVER used a £5 car wash, always done myself, so I would not take a stupid scraper to my windscreen.

gravitygravy

99 posts

66 months

Sunday 11th December 2022
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1500w mains fan heater with an extension cord from the house. Flick the switch on when you get up, by the time you're ready to go the inside of the car is baking hot.

sherman

15,303 posts

245 months

Sunday 11th December 2022
quotequote all
Escort Si-130 said:
sherman said:
Pair of gloves and an ice scraper will be quicker and cheaper.

Also wont drain your battery unexpectedly.
A 2 litre bottle of room temperature water is best. NOTHING does it faster than this. I would NOT use a scraper, leaves marks on your windscreen, if you do not care about the car or go to £5 car wash boys, then go for it.
I have NEVER used a £5 car wash, always done myself, so I would not take a stupid scraper to my windscreen.
Eh?
A plastic ice scraper does not leave any marks.
In 20 years of motoring in Scotland I have never had a problem with a plastic ice scraper.
Warm water just risks breaking your windiw if you get 'warm' slightly wrong.

I actually drive a ford so just press the heated windscreen button and sit in my heated recaro seat as the car defrosts itself quickly on its own.

As for going off on one entirely unrelated to the thread about car washes, how do you know I dont wash my car myself? I do as it happens.

FiF

48,913 posts

281 months

Sunday 11th December 2022
quotequote all
Fill a zip-loc bag with warm water, rub bag over frozen screen and windows, keeps your hands warm too. Clearly though you need to get the heater up and going to stop it refreezing.

Almost the best ultimate in car combo is heated screen and a hvac unit with a 1kw PTC heater, warm air starts coming out inside a minute on mine. I say almost the best as clearly THE best is a fuel burning aux heater on a timer like an Eberspächer or Webasto unit.

cheesejunkie

5,312 posts

47 months

Sunday 11th December 2022
quotequote all
sherman said:
Escort Si-130 said:
sherman said:
Pair of gloves and an ice scraper will be quicker and cheaper.

Also wont drain your battery unexpectedly.
A 2 litre bottle of room temperature water is best. NOTHING does it faster than this. I would NOT use a scraper, leaves marks on your windscreen, if you do not care about the car or go to £5 car wash boys, then go for it.
I have NEVER used a £5 car wash, always done myself, so I would not take a stupid scraper to my windscreen.
Eh?
A plastic ice scraper does not leave any marks.
In 20 years of motoring in Scotland I have never had a problem with a plastic ice scraper.
Warm water just risks breaking your windiw if you get 'warm' slightly wrong.

I actually drive a ford so just press the heated windscreen button and sit in my heated recaro seat as the car defrosts itself quickly on its own.

As for going off on one entirely unrelated to the thread about car washes, how do you know I dont wash my car myself? I do as it happens.
I miss my heated ford windscreen. I’ve worked and driven in colder countries than here and an ice scraper is the tool of choice. But a dry low humidity frost is much easier to scrape than the wet ice sheet on the car over the last few days.

rigga

8,806 posts

231 months

Monday 12th December 2022
quotequote all
98elise said:
Wokingwedger said:
Yes, I suspect my car may have some sort of aux heater, as it has a front screen button like the rear screen, but it’s not impressive !
Surely thats just a heated front screen? Fords have had them for a couple of decades.
My 12 year old mini has one , one of those things that's only appreciated once in a while.

Wife's Qashqai has too, and a heated steering wheel, which having tried for the first time yesterday, is brilliant.

Teddy Lop

8,301 posts

97 months

Monday 12th December 2022
quotequote all
rigga said:
My 12 year old mini has one , one of those things that's only appreciated once in a while.
.
Use mine loads; even on non winter cold mornings it stops the screen misting before the HVAC wakes up.

Speed addicted

6,329 posts

257 months

Monday 12th December 2022
quotequote all
Teddy Lop said:
rigga said:
My 12 year old mini has one , one of those things that's only appreciated once in a while.
.
Use mine loads; even on non winter cold mornings it stops the screen misting before the HVAC wakes up.
My wife’s discovery sport has the heated screen and remote start. It’s quite annoying hearing it fire up while I’m defrosting a frozen pickup!

Zero Fuchs

2,749 posts

48 months

Monday 12th December 2022
quotequote all
Speed addicted said:
Bottle of warm (not boiling) water poured over the screen, defrosts inside and out.
Job done.
One up from this is to put warmer water into a zip lock bag and then wipe it over the screen. Then you won't get water all over your drive/road.

Wokingwedger

Original Poster:

1,030 posts

235 months

Monday 12th December 2022
quotequote all
No, it’s not electric elements like a Ford. It’s hot ( eventually) air. Car is Audi A6.