Electrical heater

[justex97]

Hello All,
Happy new year.

Does anyone have installed an auxiliary heater to A4 B6 1.8T?
I am trying to find some information or forum thread, if anyone could help me will be highly appreciated.
Thank you in advance!

[grayjay]

In my experience, a good functioning stock heater is very strong, Ive driven my A4 at temps down to -25°C and stayed entirely comfortable.
If you are not getting good heat address the problems, flush & bleed or just replace the heater core before resorting to add-on "fixes".

[Mike Tries]

Were you referring to an auxiliary cabin heater or an externally-powered engine block heater? I've never used either, but I've heard that electric cabin heaters aren't very good in cars in general. You don't have much power at your disposal to work with, so you can't generate a lot of heat. 12 volts at maybe 20 amps? A hair dryer runs at a little bit more than 1,400 watts (in the U.S., but probably elsewhere too), but you are looking at a roughly-12 volt source with a 20 amp fuse--that's only a little bit more than 200 watts that you'd want to sustain for any length of time if you're pulling that power from the cigarette lighter. That's a breath of somewhat warmish air.

[EuroxS4]

If he's in Bulgaria I would assume its a diesel, looking for a block heater this is my guess.

[Mike Tries]

He called it a 1.8t. But I've seen gasoline car engines offered from the factory with block heaters, so you could still be right.

Did they make a 1.8 liter turbodiesel?

[grayjay]

Looks as if factory solution is to use a silicon heater pad attached to the oil pan.
https://www.audizine.com/forum/showt...k-Heater-1.8TQ

I've always been impressed with how reliably my 1.8t starts in really cold weather even without a engine heater.

[justex97]

Hello, i am talking abot the elecrical heatar which stays next to the standart heater core. This is the part number - 4B2819011. Originaly most of the disel engines comes with this thing but not the petrol engines.
It does not heat the engine but the cabin. 30 seconds after you start, you have hot air from the vents.

Stays here, you can see the plugs left on the heater core:


This is the only thing i found about retrofit - https://forums.tdiclub.com/index.php...6/post-5631083

[walky_talky20]

Were you referring to an auxiliary cabin heater or an externally-powered engine block heater? I've never used either, but I've heard that electric cabin heaters aren't very good in cars in general. You don't have much power at your disposal to work with, so you can't generate a lot of heat. 12 volts at maybe 20 amps? A hair dryer runs at a little bit more than 1,400 watts (in the U.S., but probably elsewhere too), but you are looking at a roughly-12 volt source with a 20 amp fuse--that's only a little bit more than 200 watts that you'd want to sustain for any length of time if you're pulling that power from the cigarette lighter. That's a breath of somewhat warmish air.

I believe these OEM PTC Aux heaters are generally about 900-1500 watts and protected by a 100 Amp fuse. They do be kicking out some heat. Unsurprisingly, Audi had some Recalls and TSB's for melting the wiring that goes to the heater matrix on some models. Yikes.

Here's an example:

[Kevin C]

Might be a good use of the 180 amp alternator I installed. It would be useful as a way to get instant heat while the engine is warming up.

[Mike Tries]

I'm intrigued, too. Why don't all cars have this?

[justex97]

As far as I understood only some diesel powered engines comes equipped with this. It seems pretty easy and cheap to install, the only thing I am concerned for is the alternator. It is a 1kW heater, so I don’t know if this will not harm anything.
Additionally still waiting for some feedback if this thing heats really and if it is efficient.

[walky_talky20]

The efficiency and environmental benefit of these comes solely from owners *not* idling their diesel engines for 20 minutes just to defog the windshield so they can drive to work. Instant heat allows far less idling. If implemented on gasoline engine cars, it would be for the same reason. Reducing idling time, thus saving 3 Earths.