D2 night heater help its cold out side

[budice83]

Hi there everyone

Fitted a new night heater in my westy a d2 but it dose not fire up all the time. if I start the van and then switch it on it start up, so I fitted two new battery to it Bosch 80amp.
And it then fired up with out the engine but then I was away for a weekend and ended up having two flat batteries but lucky for me I had some jump leads and link them over and it started up


Help it's cold out side

[weldore]

Don't you just love predictive text..it must still be the power source if it works with the engine running

[Oldiebut goodie]

Fat,short cables to your heater from the battery, no joins except fuses, solder all joins not choc boxes. Check your voltages along your cables.
Type your questions on a computer with standard grammar and it will be easier for us to decipher what you are saying!

You could push your voltage up to 13.5v with a converter but it will not solve the basic problem of having too low a voltage to start with.

[California Dreamin]

It just sounds like you flattened the new leisure to a point that it couldn't run the heater.
Wire in the second battery (in parallel) to double your leisure battery capacity and fit some sort of battery monitoring gauge so you can see their condition.

Martin

[budice83]

Hi there

And thanks for getting back to me
but yeah I have never Changed the wiring so it's how it was on the westy when it came out of the factory all I did was remove the old unit and fit the d2 in.

If any of you have a westy what do u have fitted in ya van and how long do u get from your battery's ?


Thanks
for your help

And it's cold outside

[Oldiebut goodie]

You haven't stated what voltages you are getting. You haven't got enough power for some reason. An 80Ah battery will not give you long especially if you are using a car battery and running lights /tv/...etc.

[ninja.turtle007]

but yeah I have never Changed the wiring so it's how it was on the westy when it came out of the factory all I did was remove the old unit and fit the d2 in.

I did exactly the same and had issues with the D2 starting, running for a few seconds and then shutting down. I had to replace the cable between heater and the leisure battery.

But as has been said you need to test it with a multimeter.

[budice83]

Hi

Engine off 12.8
Engine running 14.4

If the d2 gets lower than 12.4 it will turn it self off to save the battery

Ps don't have a tv light are all LEDs

[ninja.turtle007]

Hi

Engine off 12.8
Engine running 14.4

If the d2 gets lower than 12.4 it will turn it self off to save the battery

Ps don't have a tv light are all LEDs

Is that taken from the heater or the battery?

[California Dreamin]

Looking at the battery 'state of charge' graph it's not hard to see why the heater fails so quickly.....
I know these charts are fairly 'rough' but the 12.4 volts stated is reached after only 25% discharge.
If my memory serves me right, the original heater had a lower minimum requirement of 11.7volts (about 75% discharge..3 times as much) so the battery would last much longer before the heater would fail.



I've a 110ah leisure in parallel to the original fitment (72ah) under the drivers seat on my California (I've fitted this bigger battery in the small cupboard left of the fridge).


Martin

[Oldiebut goodie]

The trouble with heaters is the voltage drop whilst the glow plug is drawing a large current.
What is the voltage at the heater whilst it is starting?

[budice83]

Hi there all

And a big thank you.

Tomz I will put my tester on it and see what power I get to the heater side
On the battery side of thing I was hoping I could fix it with out having to fit a 3rd battery but its looking like I'm going too.


Anyway I will be back on here to post what I come up with ASAP

Once more thanks for your help

[budice83]

Hi there

Put the tester on it today and getting 12.9 to the heater

[Oldiebut goodie]

Is that whilst the heater is starting?

[budice83]

When it got going it drop down to 12.83