Webasto DW80 - Spares anyone?

Tim Good

Tim Good

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I'm rebuilding my Webasto DW 80 heater which is similar and shares a lot of spares with the Thermo 90.

I need a new burner, flame sensor and temp sensor. If anyone happens to have these or any spares for it at all let me know please.

Or any advice from anyone that has rebuilt one would be welcome. I recently tried to fire it up and fuel it running fine and the control unit is giving no faulty but it just doesn't start.

The burner I think is the first thing to replace but in cleaning it all I have accidentally damaged the flame sensor, and temp sensor also.

Thanks

Tim
 
pvb said:
There's a burner kit on eBay - http://www.ebay.co.uk/itm/Webasto-Water-Heater-DW80-Thermo-90-Burner-Kit-/271422855747
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Thanks.. yeah I know but once the burner and two sensors are replaced it gets on to be £400... then that might not even work so I'm trying to sourse used but known to be working parts as both spares and to rebuild.

If I have to buy at top whack prices then it gets close to just buying a new unit at some point.

I did see a 24v version whole unit on ebay but I run a 12V system. Does anyone know if stepping from 12-24v can be problematic?
 
northcave said:
Thanks.. yeah I know but once the burner and two sensors are replaced it gets on to be £400... then that might not even work so I'm trying to sourse used but known to be working parts as both spares and to rebuild.

If I have to buy at top whack prices then it gets close to just buying a new unit at some point.

I did see a 24v version whole unit on ebay but I run a 12V system. Does anyone know if stepping from 12-24v can be problematic?
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You should be fine with the 24v one for parts, assuming it's any good. Obviously the hardware parts like burner are identical, but not so obviously the sensors are also the same, the only parts that are voltage dependent are the glow pin, air motor and ECU. BTW, no fault code and no start is almost invariably a stuffed burner, or sometimes a burner tube or both, they crack and the falme aperture even melts away, similar with the T90, I have just rebuilt one of those and it came to just shy of 1K including removal and refit, I did advise a replacement with a pro 90 (much cheaper parts for the future) but the horse would not drink. Stepping down is cheap, stepping up with enough reliable power though not problematic, is not cheap by the way.
 
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David2452 said:
I have just rebuilt one of those and it came to just shy of 1K including removal and refit, I did advise a replacement with a pro 90 (much cheaper parts for the future) but the horse would not drink.
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So the Thermo Pro 90 replaces the Thermo 90? Around £950 is seems. Yeah £1k on a rebuild sounds ridiculous then.
 
To be accurate it is an alternative to the 90ST which replaced the 90S, which replaced the 90, which replaced the DW.... as for price, yes, except the Pro stands for Pro or OEM use, you have to make your own loom and control system which can add quite a bit depending how complex you want it. It's main advantage is the reduced service cost.
 
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David2452 said:
To be accurate it is an alternative to the 90ST which replaced the 90S, which replaced the 90, which replaced the DW.... as for price, yes, except the Pro stands for Pro or OEM use, you have to make your own loom and control system which can add quite a bit depending how complex you want it. It's main advantage is the reduced service cost.
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Ok well considering I have a loom, switch, exhaust and all the water pipes already maybe it is a good option. Should be a bolt on a work job maybe?
 
northcave said:
Ok well considering I have a loom, switch, exhaust and all the water pipes already maybe it is a good option. Should be a bolt on a work job maybe?
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They are interchangeable on simple control system, and you can't get much simpler than the standard rotary switch which is what I assume you will have so you should be good to go. They do have some sophisticated bits like altitude adjustment switching which would need some pretty big waves to be needed. Being a NATO issue unit they also have an "Arctic Start" function which may be of more use.
 
David2452 said:
They are interchangeable on simple control system, and you can't get much simpler than the standard rotary switch which is what I assume you will have so you should be good to go. They do have some sophisticated bits like altitude adjustment switching which would need some pretty big waves to be needed. Being a NATO issue unit they also have an "Arctic Start" function which may be of more use.
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Interesting. Yeah I like the simple switch with a flashing light. Simpler the better. Considering we're designing for high latitudes ad arctic start sounds useful. What does that do? Leave the glow pin on for longer and do something with the fan?

If you have a simple switch then does it just bypass those advanced functions and make them inaccessible.
 
northcave said:
Interesting. Yeah I like the simple switch with a flashing light. Simpler the better. Considering we're designing for high latitudes ad arctic start sounds useful. What does that do? Leave the glow pin on for longer and do something with the fan?

If you have a simple switch then does it just bypass those advanced functions and make them inaccessible.
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Yes, the basic loom would not even connect them, if you want a 90 pro electrical schematic I can email you one.
 
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