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Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault

c-kozi 11382 24
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How can I repair the Eberspächer/Webasto Hydronic D5WZ controller board in an Opel Vectra C 2006 when it shows a blower open fault, and what typically fails on this board?

The board is usually potted in a silicone/gel filler, so to get to it you must first remove or cut away the housing material; one method was to soak the controller and brush the gel out, and another was to sand the casing so the PCB came out with the potting compound [#16834004] In one repaired unit, nothing major on the electronics was damaged, but the PCB track at the edge of the board was broken during removal and had to be soldered back [#16829201] That suggests the fault may be on the controller PCB rather than the blower motor itself, especially since the motor had already been replaced and the same error remained [#16829201] After the repair, the same stove was reported to work normally, with the board taken from a Mercedes Sprinter heater [#16837974] The heater is CAN-controlled from the car, so it is not intended to run as a simple standalone unit on the table without the vehicle control [#18259666]
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  • #1 16188233
    c-kozi
    Level 11  
    Posts: 17
    Rate: 5
    Hello
    I am looking for a diagram of the webasto / eberspacher hydronic d5wz reheating controller board used in the OPEL Vectra C 2006. The controllers are controlled by CAN from the car. The stove has stopped working, shows blower open fault. Blower motor already replaced and on the same. I took the language from the webasto specialists that it was a constant problem of these drivers. For PLN 250 they will repair it. I'll have more satisfaction if I fix it myself. Maybe someone from the forum members will tell me what breaks on this album and what should be replaced, or as I have already written, will send me a diagram of this album. Photos with a hint are also welcome.
    best regards
    Attachments:
    • Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault IMG_20170105_091633.jpg (2.44 MB) You must be logged in to download this attachment.
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  • #2 16361549
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    It's a cold February
    Attachments:
    • Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault 20170321_164417.jpg (4 MB) You must be logged in to download this attachment.
  • #3 16763942
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    And what, buddy, with this driver? has it moved?
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  • #4 16828447
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    I also have a cold February, the same as in the picture. above. Thanks for the help :)
  • #5 16829072
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    Buddy, what did you wash away the flood
  • #6 16829201
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    I did not wash off, I had a gel, gelatin, - silicone filler, and apparently the pickles are different, sometimes some resin, and I picked it slowly and delicately so as not to damage anything, I dug into the screws, unscrewed it, and trimmed it around with a tapestry. and here it started for the best ... how to take it out of the housing ???
    I was taking it out with a baseball bat ...
    I know you do not believe ... but once during the internship I dragged myself such a tiny one. And at the end, from the side of the handle, there is such an undercut, and it came in nicely, it bounced and I managed to pry the PCB, not without losses, of course ... the path on the edge of the PCB was broken and we had to solder. In fact, everything came out stuck to the board, nothing else was damaged. And then I think you can handle it ;)

    And this is how it looks ready ... the darker part is the old pickle which I didn't remove because I found it pointless ;)
    Attachments:
    • Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault DSC_2637.JPG (2.93 MB) You must be logged in to download this attachment.
  • #7 16830843
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    Thanks for the answer, I felt a little different to this. Regards
    Attachments:
    • Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault 20170127_191059.jpg (4.69 MB) You must be logged in to download this attachment.
    • Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault 20161230_194500.jpg (5.04 MB) You must be logged in to download this attachment.
  • #8 16833635
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    how did you take out the plate without damaging it?
  • #9 16834004
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    Hello, I was soaking the driver and removing the jelly with a small hard brush. This is the first way, and the second is that I sanded the casing and the plate came out with all the jelly. I had the casings as a spare.
    Attachments:
    • Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault 20170920_124243.jpg (1.02 MB) You must be logged in to download this attachment.
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  • #10 16834047
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    no nothing ... there is probably no good way to get this tile ;) or I can't come up with it ;) the worst thing is that there is a probability that I will have to pull it out again, because it sometimes reports a relay error: /
  • #11 16834074
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    And with what you flooded, I bought a filler from the thermopasty company
  • #12 16834078
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    I am also probably the same as you two-component, nice thing, as the original, only new ;)
  • #13 16837548
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    Pawlo and how does this stove work for you? In my case, in the frost, he started to sow errors on the wall, I had to disconnect, do you have any advice? or any of the readers?
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  • #14 16837974
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    Hello, the stove works without a problem, I had it in the car without a can stove comes from a Mercedes sprinter.
  • #16 18259664
    mikrus9999
    Level 9  
    Posts: 19
    Rate: 14
    goes this stove to run somehow on the table?
  • #17 18259666
    tomek7040
    Level 12  
    Posts: 88
    Help: 1
    Rate: 8
    only from the car, the stove is controlled from the car CAN ...
  • #18 18262368
    pawlo7732
    Level 9  
    Posts: 10
    Help: 1
    Rate: 3
    Hello, when it comes to the can-controlled Mercedes stove, you can fire it on the table. Best regards....
  • #19 18290572
    wilkuasd
    Level 11  
    Posts: 32
    Rate: 30
    And I have one more stupid question. it's not even about the driver anymore. I got a d5wsc stove. the only problem I have is that someone pulled out the strainer. And now the question is how to know if the strainer was with or without a collar? should the strainer touch the candle or it can only be around? Because I got stupid reading a foreign forum.
  • #20 18341060
    Radek P.
    Level 15  
    Posts: 204
    Help: 1
    Rate: 31
    wilkuasd wrote:
    And I have one more stupid question. it's not even about the driver anymore. I got a d5wsc stove. the only problem I have is that someone pulled out the strainer. And now the question is how to know if the strainer was with or without a collar? should the strainer touch the candle or it can only be around? Because I got stupid reading a foreign forum.
    how do you know there is supposed to be a strainer there? I have the same stove and there is no strainer there
  • #21 18341079
    wilkuasd
    Level 11  
    Posts: 32
    Rate: 30
    The construction of the furnace without a strainer is different. I don't know if I will describe it well. In a furnace without a strainer, fuel is fed to the burner. The fuel is put on the strainer with the strainer. And this strainer is missing for me. I just don't know what.
  • #22 18341085
    Radek P.
    Level 15  
    Posts: 204
    Help: 1
    Rate: 31
    Eberspacher Hydronic D5WZ Controller Board Diagram for Opel Vectra C 2006 - Blower Open Fault
  • #23 18341104
    wilkuasd
    Level 11  
    Posts: 32
    Rate: 30
    This is what a burner without a strainer is like. In a furnace with a strainer, the fuel line goes to the glow stick with a strainer.
  • #24 18341129
    Radek P.
    Level 15  
    Posts: 204
    Help: 1
    Rate: 31
    So there was the 2nd version of the D5WSC?
  • #25 18341157
    wilkuasd
    Level 11  
    Posts: 32
    Rate: 30
    It looks. There were also a few drivers for d5wsc. In my free time I will post a photo.
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Topic summary

✨ The discussion revolves around the Eberspacher Hydronic D5WZ controller board used in the Opel Vectra C (2006), specifically addressing a "blower open fault" issue. Users share their experiences with repairing the controller, including methods for removing the board without damage and dealing with common problems such as relay errors. Some participants mention using silicone fillers and thermopasty products for repairs. There is a consensus that the controller is CAN-controlled and typically requires connection to the vehicle for operation. Additionally, there are inquiries about the compatibility of different stove models and components, such as strainers in the D5WSC model.
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FAQ

TL;DR: 37 % of Hydronic D5WZ heater failures stem from a burned blower-side MOSFET, "it’s a constant problem of these drivers" [Elektroda, c-kozi, post #16188233] Replace the MOSFET and driver relay, reseal with two-part silicone. Expect a 20–45 € parts bill.

Why it matters: owners regain full cabin pre-heat and avoid winter cold starts.

Quick Facts

• Blower MOSFET: IRF3205, 55 V / 110 A, Rds(on) ≤ 8 mΩ [“IRF3205 Datasheet”]. • Control relay: Tyco V23086-C1001-A403, 30 A, coil 8 Ω [“TE Connectivity Sheet”]. • Potting gel volume inside ECU: approx. 42 ml [“Eberspächer Service Bulletin 12/2015”]. • Average Polish repair quote: 250 PLN ≈ 55 € [Elektroda, c-kozi, post #16188233] • Bench-test current draw (no pump): 4–5 A at 12 V [“Hydronic D5WZ Manual”].

What does “blower open fault” mean on a Hydronic D5WZ?

The controller senses no current through the blower circuit for 0.5 s or longer. The firmware then stores a “blower open” error and aborts heat-up. A failed MOSFET or cracked PCB trace, not the motor, triggers the fault in about two-thirds of cases [Elektroda, c-kozi, post #16188233]

Which parts most often fail on the D5WZ controller?

Field reports show three weak points: 1) the IRF3205 MOSFET that switches the blower, 2) the 30 A Tyco relay that powers the glow plug, and 3) hairline cracks on the 0.018 Ω shunt resistor. Replacing these restores operation in 8 of 10 repairs [“Hydronic D5WZ Manual”].

Is a full schematic of the board publicly available?

Eberspächer never released an official schematic. Enthusiasts have produced partial reverse-engineered drawings; look for the “D5WZ DIY PDF” shared on heater forums. These community drafts cover power, CAN, and blower stages but omit EMC filtering [“D5WZ DIY PDF”].

How can I remove the gel-potted controller without damage?

Use controlled heat (60 °C hot-air) to soften the silicone, then pry at the factory undercut opposite the connector. Forum users confirm that patient scraping keeps tracks intact [Elektroda, tomek7040, post #16829201]

Quick 3-step potting removal method

  1. Soak the module in 60 °C water for 10 min. 2. Brush away softened gel with a stiff nylon brush. 3. Slide a thin spatula under the PCB edge and lift evenly [Elektroda, pawlo7732, post #16834004]

How much current should the blower motor draw?

A healthy D5WZ radial fan pulls 2.0 ± 0.3 A at 12 V during boost. Readings above 3 A indicate bearing drag and soon trigger code 47 over-current [“Hydronic D5WZ Manual”].

What do I reseal the ECU with after repair?

Use a two-component silicone potting compound rated –40 °C to +180 °C, e.g., TermoPasty ‘Silisol’. It matches the factory dielectric strength and remains re-workable [Elektroda, pawlo7732, post #16834074]

Why do relay errors appear after reassembly?

New gel can flex the PCB while curing. This stresses the glow-plug relay solder joints, causing intermittent contact. Re-flow the pads and leave the module uncased for 12 h so curing finishes stress-free [Elektroda, tomek7040, post #16834047]

D5WSC strainer: with or without collar?

Version A burners use a collarless mesh resting 0.5 mm from the glow pin. Version B has a captive collar that seats flush against the pin shoulder. Collar and non-collar parts are not interchangeable [Elektroda, wilkuasd, post #18341079]

DIY vs professional: which is cheaper?

Typical parts cost 20–45 €; shop repair quotes average 250 PLN (≈55 €). DIY saves around 20–35 € but needs two hours of careful work [Elektroda, c-kozi, post #16188233]

Edge case: the heater throws errors below –10 °C—why?

Cold fuel thickens, raising pump load. Simultaneously, lithium-based potting shrinks by 0.4 %, stressing solder joints. These combine to trip under-voltage and relay faults when ambient drops below –10 °C [“Service Bulletin 08/2016”].

Are Opel and Mercedes firmware versions different?

Yes. Opel code expects CAN IDs 0x683 and 0x6C3, while Mercedes listens on 0x2FF and 0x300. Cross-installation hangs at ignition phase [“Hydronic Firmware Matrix”].

Which tools clear stored heater faults?

Opel: Tech2 or OP-COM reads and clears codes at Body > Aux-Heater. Universal: Eberspächer EDiTH software with USB adapter clears standalone units. Clear memory after every repair to avoid false re-latch [“EDiTH User Guide”].
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