Just purchased a second hand but in good condition Eberspacher d5 ws heater which I have now spent many a weekend installing and making all the pipes neat etc.
Unfortunately it all does not work and now feel stumped.
This unit has the external water
pump which gets located in line with the flow in to the unit which has all been installed correctly. The heater clicks away and fires up using a easy start timer but after 1 min or so it closes down which I have now worked out to be down to the fact the heater is too hot because the pump is not circulating water
I have taken the two wires out from the back of the pump which come from the control box
and tested the pump which whines a way merrily pumping water around the system. So my problem must be in the control box
Has anyone had this problem before?
I have read all the manuals
and it does say that pimp should start when heater starts which is not the case. I have wondered if the controller has a setting on it which stops pump if you are using in a vehicle with it's own water pump,
I have also checked the pump cables
and no power detected,
Thanks again Nick