my dw5 water heater has given up on me i fired it up at the beggining of the winter it ran for one hour and shut down, i tried it again and again. J. Ebersp├Ącher. GmbH & Co. KG. Ebersp├Ącherstr. D Esslingen. Telefon (zentral). (07 11) 9 39 – Telefax. (07 11) 9 39 – 05 00 www. eberspaecher. Eberspacher Hydronic trouble shooting guide this page details the basic troubleshooting steps to take of your eberspacher hydronic heater unit stops work .

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Join Date Jan Posts 1. Eberspacher DW5 Water Heater my dw5 water heater has given up on me i fired it up at the beggining of the winter it ran for vw5 hour and shut downi tried it again and again ,it would not start it will go through the start up procedure but shuts down i have checked fuses the fuel is not pumping the glowplug is not eberspacger up, i have had them seen to and are ok plus the wiring ,the batteries fully charged,alsocut out fuse can you help.


There’s a useful Troubleshooting Manual here – it tells you how to connect a test light, and shows the fault reasons for various combinations of light flashes.

Might help you to identify the problem. Normally the glow plug uses eberspachsr for a while before the pump kicks in.

Are you still over 10 volts on the supply to the unit at this current? Is the relay ‘making’ to connect the glowpug? I’d start checking there if Ebetspacher had already checked the fuse holder my problem has always been the fuse holder that gets a dry joint between the fuse and the fuse holder – tends to melt fuses with the heat.

I’d check to see whether the above current is being drawn first. If not, find the glowplug relay and see whether that’s switching. The later manuals are also available from the same source as mentioned by PVB.

Eberspacher DW5 – General Boating – Canal World

In any case, eberspacer units are essentially very simple – if you have heat, fuel and air they will work. There are, however, lots of safety controls that can “get in the way” to shut them down in case things go wrong! Normally the gauze round the glow pin – certainly on the later model that I have D5WS.

If you have no fuel AND no heat then there may be a controller fault. If it just the fuel not pumping then it could be the pump.


You can easily check this by disconnecting it and arranging to connect it directly to 12v or 24 if yours is that version. If it doesn’t tick, then you have found the fault well, one fault at least! If it does, then reconnect to the heater eberspachr try again. A strip-down, may well be in order to check all is clean in any case. Be aware that if you do have the D5WS, then you need two special tools to remove the wires from the internal multi-plug connector otherwise you cant remove the glow pin or flame sensor and therefore cannot dismantle the unit.

Jerry Colvic Watson Owners Group.

They usually spring out if the unit looses electrical power without a proper cool down cycle. After that, the heater oil pump will not operate until the over-heat switch is depressed again.

Eberspacher D5W Manuals, Error Codes & Guides

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