Eberspacher Fault?

Discussion in 'Tech/Mech General' started by steveclecy, Mar 30, 2013.

  1. steveclecy

    steveclecy Read Only Funster

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    Whilst we were away in the cold snap recently, we were struggling to get a decent temperature in the van. The Eberspacher Mini Controller (pictured) did not seem to vary the temperature whatever it was set to. Whether it was set high or low, it seemed the thermostat cut in before the van was really warm enough. There is a temperature sensor. Probably the most demanding conditions we have used the van in and we had to supplement with electric fan heater. Any ideas? I would have thought it was capable of bringing the temperature up better than it did.

    Steve
    [​IMG]
     
  2. Snowbird

    Snowbird Funster Life Member

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    It could be the control unit at fault, but it could also be a blocked filter, just before the inline pump. Carefully unscrew the pipe going into the pump and you will find a small filter. Give it a clean in petrol and try it again.
     
  3. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    What is the location of the temperature sensor?

    D.
     
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  4. steveclecy

    steveclecy Read Only Funster

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    It is mounted near a side window above the table. I actually got to the stage of unscrewing it and "wafting" it about, even blowing on it!

    Steve
     
  5. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    Do you know what size the Eberspacher unit is? and is it an air heater or combi?

    D.
     
  6. steveclecy

    steveclecy Read Only Funster

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    Don't know the size. It is an air unit.

    Steve
     
  7. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    Perhaps its just not powerful enough for the size of van it has to heat, a 2KW unit would struggle with a medium to large motorhome in sub zero temps for example. Hopefully I will be getting some training on Ebers soon then I might be able to help more.

    D.
     
  8. steveclecy

    steveclecy Read Only Funster

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    Appreciate your input. I did wonder if it was powerful enough. But it seemed to reduce air speed before it was warm. However, it was darned cold!

    Steve
     
  9. stcyr

    stcyr Funster

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    We've used Eberspachers in the past, among other types, on one memorable occasion down to -22c, and the one time performance did drop off it turned out to be an accumulation of fluff on the round air-intake grille/filter on the unit. Once removed full output was restored (and that was a 2000w in a 23' van) ... worth checking ... :Smile:
     
  10. FULL TIMER

    FULL TIMER Read Only Funster

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    Another thing to consider,,, when switching the heater on does it run for approx. 5 minutes and then start to shut down ? if this is the case this happens if the heater has recorded overheat fault codes more than three times and the fault codes need to be cleared before the heater will run properly again. I would think that you have either a D2 or D4 airtronic which are normally very reliable and either would be more than capable of heating your van. If you happen to be anywhere near Norwich I'd be more than happy to take a look and clear any fault codes etc,
     
  11. steveclecy

    steveclecy Read Only Funster

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    No, it does continue to run. Usual process of runs cold for a few minutes, low fan speed, the starts to warm up, increasing fan speed, but then after perhaps 10 or 15 minutes it stays warm but the fan speed decreases considerably (as if it had reached the desired temperature) but the air is still warm.

    Steve
     
  12. Snowbird

    Snowbird Funster Life Member

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    Am still going for a blocked filter or low batteries.
     
  13. FULL TIMER

    FULL TIMER Read Only Funster

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    Then I would say either the temperature sensor or the controller is at fault , If you decide to change the controller there is a new one available with the sensor built into it which might work out cheaper than replacing yours and the temperature sensor, It shouldn't be down to low voltage as if this was the case the heater should shut down, the filter in the pump is a possibility but again I think this should cause a shut down but it is worth checking although in about 15 years of fitting eberspachers I've never had a problem with the pump filters,
     
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