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Old 12th January 2021, 21:06   #1
GBCB1986
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Default Webasto heaters

Hi all, are the webasto heaters all the same in our cars or are they different depending on year of manufacture, whether the car was bought with the optional remote and/or timer unit?

Also apart from the unit and dosing pump is there anything else needed to retrofit it to a car? Is all the pipe work (fuel and coolant), wiring etc already in the car?

Cheers, Graham.
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Old 12th January 2021, 21:12   #2
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Hi,

There are two types fitted to our cars, one is triggered by a negative signal, the other by a positive (The negative one is the most common)

They can be fitted easily as all cars have the loom and fuel pipe in place, the remote (Telestart) Was an option.

Its easy enough to wire in a Gsm remote or a timer to trigger start up 15 mins before you plan to use the car so the engine is nice and warm, its also easy to wire in the ATC unit so it turns on and warms up the cabin ready for you.
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Old 12th January 2021, 23:03   #3
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Do you need a T80 telestart as well Andy?
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Old 12th January 2021, 23:04   #4
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Brill, how can I tell which unit I’m looking at? I’ve found one with the number 66724A on it? Failing that can a +ve trigger unit be converted to a -ve trigger?
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Old 12th January 2021, 23:05   #5
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Apart from the dozing pump my two cars had everything else in situ

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Old 13th January 2021, 11:13   #6
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One thing to bear in mind is that the vast majority of secondhand Webasto's are faulty (the PCB'S are notorious for developing faults) although they can be repaired.

Assume that unless it states working it's faulty, especially if says untested.
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Old 13th January 2021, 20:31   #7
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Quote:
Originally Posted by GBCB1986 View Post
Brill, how can I tell which unit I’m looking at? I’ve found one with the number 66724A on it? Failing that can a +ve trigger unit be converted to a -ve trigger?
Any thoughts on this guys?
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Old 13th January 2021, 20:46   #8
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Quote:
Originally Posted by GBCB1986 View Post
Any thoughts on this guys?
There is a how to on here which describe the two units (Sorry I cant find it) The + or - isn't an issue, if its a 12v trigger then its a straightforward signal from your device of choice, if its a - start, then you just need to wire in a relay to switch the negative, dead easy to do, I have the same set up in 3 of our cars.
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Old 13th January 2021, 21:30   #9
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There are only two variants of the FBH fitted to the 75, most are later model 98570B, early cars had a model 66232C, you need to be certain which model you have when testing. The model number should be on the Webasto sticker on the side of the

Remote starting For 98570B - its earth to Pin 3

Remote starting for 66232c - its +12v to Pin 1

As Trikey says it doesnít matter which one you have as long as you know which one it is and wire the remote accordingly

You will need a working FBH, dosing pump and exhaust for a basic installation, the wiring will be present in the car , if you want to start it remotely then that can be done once you have it installed and working
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Old 13th January 2021, 22:11   #10
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Thanks guys for your help, Iím just a bit confused now about the heater Iím looking at with itís number 66724a. Whatís this one? The seller is saying itís from a 75.
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