Eberspacher heating help

[broadcaster]

Hi,

Hopefully somebody can help, I went to the boat today and switch on the Eberspacher DL?. It worked fine for 40 minutes and then the fan noise started going up and down like it was speeding up and slowing down. Anyway I switched it off at the timer. After leaving it for a while I tried to switch it on again and all I could hear was clicking from the main unit, somtimes slow ticking sometime fast. The fan didn't move at all.

I also can't hear the dosing pump making any noise.

Can anybody help with what to check. The batteries are well charged and the engine was running as well.

Thanks

Andy

 

[johna]

Have you checked the fuel supply sounds like out of fuel to me.

 

[broadcaster]

Thanks, I will check tomorrow. Hopefully it is as that would be a cheap fix.

Is there any way to test the dosing pump, I thought I read somewhere about it not being a constant 12v supply but a pulsed supply.

Andy

 

[starboard]

Sounds to me like the ticking you are hearing is actually the pump ticking....may be it is fuel or lack of due a blockage. Iy you can get at pump easy the pick up side of the pump has a very small filter in the line at the point the pipe enters the pump. Disconect this and check filter and fuel. If you think fuel is the problem put the pickup pipe into a small can of paraffin and try running on that. That is the best type of fuel to use and is good for cleaning out the combustion chamber any way.

 

[david_bagshaw]

May be the fan motor brushes are worn?

our d7l went like that before it failed

presume you have tried turning the fan by hand, incaseit is the bearings as well

 

[alex_rogers]

If you make up a jumper lead long enough to supply 12V directly to the pump, you can simply manually make and break the connection to simulate the pulsed supply. Each time you supply power, the pump will cylce and pump some fuel.

 

[VicMallows]

Suggest a first move with those symptoms is as David Bagshaw suggests: make sure the fan still turns easily by hand. My motor (D1L) jammed solid. Eventually, after stripping the motor, found that 2 small circlips in grooves were used on the shaft, apparently as an assembly aid to accurately set the positions of the two bearings. Unfortunalely being mild steel, one had rusted and disintegrated jamming the motor. A pity since otherwise a nicely constructed motor. When speaking to Krueger at a show they were indeed aware of this 'problem'! Since the circlips are redundant after setting the positions of the bearings, I just wish the motor manufacturer had bothered to remove them!

Vic

 

[broadcaster]

Thanks for the replies, I have been on the boat today and checked several things. The dosing pump is clean and works fine. The heater will start OK now, but the fan speed is all over the place. I opened it up and the fan turns really easily, no resistance at all. It also does this strange speed variation on the summer ventilation setting, so it is nothing to do with the temperature regulation itself.

I measured the voltage on the various 12V feeds and they are OK and the batteries well charged.

It looks like there is a sensor on the control unit and metal insert in the fan which must be used to detect fan speed as part of the variable speed function and temperature control. I suspect the control unit may be broken and trying to vary the speed of the fan too much. Has anybody got experience of this, the unit is three years old.

Thanks again for your help.

 

[mldpt]

Hi sounds to me as if your voltage is low they are very sensitive to low volts
Mike

 

[JEG]

It may not help, but I had a clicking on mine when it failed to start & the source was the relay for the glow plug.

John G

 

[nictbrown]

Hi Andy

Mine had a problem with the fuse holder - poor design - which relied on a cable tie to hold the two halves together (or not). This plus general crud meant a feeble supply. New fuse and clean up fixed it.

 

[terryeves]

I had a problem like this with my D4. Sounded like a twig caught in the fan and causing uneven speed. I had to get Kreuger involved, and it turned out to be a sticking relay in the control unit. It was the relay chattering that caused the clicking noise. New relay fixed problem.

 

[VicMallows]

At least we all seem to suffer! /forums/images/graemlins/frown.gif

 

[david_bagshaw]

[ QUOTE ]
Thanks for the replies, I have been on the boat today and checked several things. The dosing pump is clean and works fine. The heater will start OK now, but the fan speed is all over the place. I opened it up and the fan turns really easily, no resistance at all. It also does this strange speed variation on the summer ventilation setting, so it is nothing to do with the temperature regulation itself......

. Has anybody got experience of this, the unit is three years old.

Thanks again for your help.

[/ QUOTE ]


definately check motor brushes, or connections. this is exactly the symptoms ours suffered

 

[ajt]

had various symptons with my eberspacher water and heating system sometimes it starts and runs for a while sometimes not ,the fuel pump runs then not. What your views on Krueger and does anyone have there e-mail address?

 

[PhilF]

I have used them on 2 occasions, for servicing and allthough the parts are always expensive, the service they give is very thorough. They are very experienced a do a good job IMHO