DieselBob
New member
I have 2007 Roadtrek based on an 2006 sprinter. I just when through a bad experience getting the Espar "Boost heater" (only useable with the engine running)replaced. The DC parts system showed my vehicle had an AUX heater (independent heater to heat engine and cabin without engine running). The boost heater has one main connector plug. The Aux heater has two connectors, a second one for a water pump. It took a call to the Chrysler hot line to get the issue resolved. I decided any future problems I would handle myself since apparently the dealerships have no training or parts to repair a heater, they just replace them. I started looking into the tools required to access the heater controller (ECU) fault codes. The manuals provided a number of options including the seven day timer (which has a diagnostic ability). On contacting Espar (North America) www.espar.com about test equipment, I was told Espar equipment delivered with Sprinters in North America can only be tested with Chrysler DC DRBIII or Star dianostics. Doubting this I contacted Eberspächer Germany and was informed the heater can be tested with their equipment but not through the vehicles OBD2 port due to other controllers present. As a point of reference I was wondering if anyone with a seven day timer installed has accessed fault codes or has tried it. Instructions can be found here http://www.espar.com/documents/7day_norelay.pdf