Brian422

I Have a Travel Power and Victron Multiplus. with three way switch; inputs from Travel Power and Shoreline, output to Multiplus. Switch to Select Input from Travel Power the Multplus Mains Input LED is on.

One Forum contributor reduced alternator pulley size so that it would produce output at lower engine speed.

Be careful when buying ebay £50 diagnostic Kit. I purchased a kit only to find out they're only suitable for Webasto with digital control board. My Webasto was installed in 2009 and has analogue control board board. Hopefully, if your Webasto is relatively new you shouldn't have a problem. Regards Brian.

Hope this helps: https://www.butlertechnik.com/downloads/Webasto_Heater_Marine_Thermo_Top_installation_manual.pdf Page 11

I'm assuming alternator output is good when engine running. When I were but a lad I had an original mini that, if used every day was fine but left longer would flatten the battery. Output from alternator appeared normal. One day out of desperation I decided to remove the alternators positive feed. Battery remained charged. Diagnosed as faulty Diode Pack. Worth measuring battery voltage and removing alternator positive lead at night and measuring voltage in morning?

I get the if it's working leave alone. My query was more about understanding what are the differences between the two pumps?

Thanks for reply but I'd found listing on butlertecnik. Really want to know whether there's a requirement to replace a little used DP2 with a DP30.2.

From new my Diesel Webasto Thermo Top C has used, according to it's profile, a DP2 Dosing Pump. I understand a Diesel installation should use Dosing Pump DP 30.2. I would be grateful if someone would advise on the differences between the two pumps and should I replace the DP2. Regards and Thanks Brian.

Purchased kit before attempting Webasto repair but only required Webasto Trouble Shooting Guide. Purchased Ross Tech Full VCDS shortly after buying VW saloon because as we all know modern vehicles are complex, unlike Webasto Water Heaters, and without diagnostics it's impossible even to diagnose any problems. I use VCDS regularly just to keep an eye out for any potential problems. Thinking o purchasing OBDEleven for convenience. If I was servicing Webastos regularly then I would purchase 'proper' Webasto diagnostic kit but as it might not be used more than once or twice a year .... .

Top PCB is Analogue, Bottom W-Bus. Connections mentioned in Workshop Manual are for analogue only:

I've attempted multiple new installs without success. Having requested details to enable items return have been contacted by seller and given step by step instructions. I'm not convinced as software is more focused on W-Bus protocol; my Thermo Top C is the Analogue version. However, will follow instructions and report back on results.

Update: Managed to remove Combustion Fan Motor from housing without damaging Fan. Quite a lot of oil on gasket and between gasket and housing; bolts securing motor to housing were loose. Shaft rotation notchy - possibly commutator or damaged bearing; source of oil. Still no joy in getting W.T.T. to communicate with Webasto; haven't given up yet!

Calling all you computer experts with experience of W.T.T. Adaptor https://www.ebay.co.uk/itm/402121622145. Boat has Webasto Thermo Top C (Not W-Bus) with temperature control via Honeywell Room Thermostat and Motorised Valve. Purchased W.T.T. Adaptor and software to enable Windows 10 Laptop to monitor Thermo Top C but unfortunately unable to open communications with W.T.T. Adaptor Windows10 Laptop W.T.T.version 2.16.1 (latest available) and selected appropriate model from Menu. Have loaded latest W.T.T. Drivers. Device Manager Com Port same as in W.T.T in Extras but any attempts to Start Diagnosis results in 'selected com port can not be used' message irrespective of selected port; automatic port selection results in endless repeat of same message and having to power down laptop to terminate. Have been playing email tennis with supplier without success. Grateful for any help or guidance. Regards Brian

Diagnostic kit took 6 weeks to arrive but given the distance and current postal strikes quite understandable. Haven't yet used because away from boat and Webasto is current sitting on bench. Dismantled Combustion Fan housing, found motor seized and what looks like oil residue, not diesel, possibly from fan bearings inside housing. Have purchased replacement. Just hoping that motor didn't draw excess current and damage electronics. Unfortunately removing motor for further examination would mean damaging fan. Perhaps will when curiosity gets the better of me. Regards Brian.

However, you're in charge. If you don't want help and you feel your being rushed, thank them for their offer and politely suggest they go away!