Webasto heating

On day 2 of 28 away and took a shower in van after which there was a water leak (pump coming on ) no sign of any water in van so after about an hour looked under van and water was coming from over flow in expansion bottle of heating system (webasto diesel ) so i turned the van water pump off ------- middle of the night need a drink of water turn on pump fill glass in dark , undrinkable ,looked in glass in the morning and water was blue ( anti freeze from heating system ) i like my alcohol but that was pushing it---- QUESTION has anybody got any ideas as to how i can separate the 2 water systems so we can have tap water running again, using bottled water, but its a pain we are near the Belgian border (heading towards Holland ) but webasto service people are thin on the ground is there a way to dump the heating water and then by-pass the fresh water from going into heating system so we up and running again
PS all going great apart from that

Nightmare Dave.
Sorry I cannot supply any practical advice but I looked up the webaso site and see there is an office in Netherlands.
I am not sure if you have tried this already but here are their contact details.
Maybe they can put you in touch with an agent in Belgium.


Postbus 41
8260 AA Kampen

Numéro de téléphone général: (038) 33 71 137

Sorry but this is the best I can do for you.

It looks like I will need a Webasto heat plate exchanger for a Thermo C or E Webasto heating system would anyone know where I might get one of these it looks easy to replace if I can get the part

This is a pic of the required part ( i hope ) i dont need the heat valve on top which is about £90 i will have to look into the required outputs and i recon one of those other exchangers would do John

Hi Paul ,a diesel run boiler heats its own water supply ( with anti freeze in it )which then heats the van water supply through this heat exchanger unit ,, my unit is leaking so contaminating van water supply with heating unit anti-freeze water i have isolated the 2 water systems from each other but this leaves me with no heating the webasto exchanger is £300 and similar systems are as cheap as£50 but which exchanger can i use ????

Mine is a 5.2kw the exchanger is a 30 plate L 310mm H70mm W70mm with 3/4 in connections it looks like 1 of the Polish ones on ebay may suit @£86 a bit cheaper than the webasto @ £311 still doing research on it anyone got any ideas let me know

Thanks John (mad max ) for that idea i have found a place in Lurgan that can repair it but if anyone knows of somewhere nearer Kildare please let me know

If you could find someone who can weld aluminium they could patch it.

Thanks ally for fixing the links (fecking iPad again )

Taylor I used to deliver stuff to that spot,
It was in the small little ind est on the right just before you come into spiddal (I can still get the distinct smell) but for the life of me I cannot think of the name of it (Irish of course) I think it was next to the spot that makes the fire brigades,

Hope Eirebus gets sorted

Sorry John (MM) for not getting back to you , when i tried to take exchanger out i found a fifth outlet under it and i could not get at it ,the heating etc is all bolted onto the van and then the walls and roof are put together on top of them when the van is being built, so its very difficult to get at anything at a later date, a local mechanic has camper experance and is going to try and get it out this Fri and then its off to Kilcock rads. where i hope it can be repaired thanks for your great idea , they will test it and i will see where i go from there ,i hope they can repair it because i have not seen any exchangers with 5 outlets if i have to buy 1 .If the worst comes to the worst i can separate the 2 water systems but i will have no hot water for shower etc..just heating and water Thanks again

Could not get exchanger repaired so have ordered a new 1 which came today so i hope to get it fitted before ESB strike as we may have to live in van for blackouts Thanks again for help and ideas

Good Morning All,
I have been trying to get a Thermotop C Webasto Water Heater working and need a new PCB Unit as the one I have I stripped out of a Chrysler Voyager and there is a CAN Bus system required to tell the thing to start.
I have tried every conceivable manner of wiring loom as recommended by various Webasto Manuals, www and still it wont kick up. I am loathed to but a PCB from the web to find that the thing didn't work anyway and am stuck with an outlay of £200 with no innings.
I can get the preheater going, the fan goes full kilter and the fuel pump works separately when switched to earth, but not in a suitable sequence as it should be.
Anyone have a knackered unit or a test loom or some way of seeing if this unit works?
Thanks