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Old 10-16-2009, 04:53 AM   #1
DieselBob
 
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Default Espar issues

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
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Old 10-17-2009, 11:44 PM   #2
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Default Re: Espar issues

I guess no North american sprinters have this option????????
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Old 10-18-2009, 08:08 AM   #3
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Default Re: Espar issues

I've got one - it seems a pretty common controller - although haven't needed to use the diagnostic features as it has been totally reliable.
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Old 10-18-2009, 09:11 PM   #4
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Default Re: Espar issues

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Originally Posted by mean_in_green View Post
I've got one - it seems a pretty common controller - although haven't needed to use the diagnostic features as it has been totally reliable.
MIG, Glad your experience has been good. However I'm trying confirm or disprove Espar N/A claim that Sprinters built for North America equipped with Espar heaters can only be tested with Chrysler DC DRBIII or Star diagnostics equipment. If the seven day timer can access the heaters controller it indicates Espar N/A is wrong and lower cost tools can be used to maintain the heater. PS: have you tried using your timer to read fault codes? Even through no faults are stored, at least you'll know it works if needed.
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Old 10-19-2009, 07:13 PM   #5
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Default Re: Espar issues

I have the Aux Timer with the Aux heater (which is the same Espar, except it runs without the engine running as you had mentioned and worth repeating).

I'll have to try the "access the fault codes" function. My heater never had a problem so there was no reason for me to look into it.
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Old 10-21-2009, 05:21 PM   #6
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Default Re: Espar issues

Espar has several good troubleshooting guides on their download page. Here's the link.
http://www.espar.com/html/service/do...technical.html
Mine is also experiencing a start problem with the timer control, but will start with the Aux control. Espar lists two documents for timers, one with a relay and one without. Anyone know whats installed on T1N's? In the document for the timer without relay, there is a procedure to clear the codes on page 3. I've tried it and it will reset and clear, but still won't start. I'll try checking the wiring, glow plug and sensor next. I remember an issue in the past with corrosion at the connector, too.
Bruce
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Old 10-22-2009, 01:27 AM   #7
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Default Re: Espar issues

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Originally Posted by bc339 View Post
Espar has several good troubleshooting guides on their download page. Here's the link.
http://www.espar.com/html/service/do...technical.html
Mine is also experiencing a start problem with the timer control, but will start with the Aux control. Espar lists two documents for timers, one with a relay and one without. Anyone know whats installed on T1N's? In the document for the timer without relay, there is a procedure to clear the codes on page 3. I've tried it and it will reset and clear, but still won't start. I'll try checking the wiring, glow plug and sensor next. I remember an issue in the past with corrosion at the connector, too.
Bruce

Research I have done found three Espar units installed in NAFTA T1N Sprinters

25 2162 05 00 00 MB number A0048302661 Dodge 5124692AA this is a heater with one connector plug used as a boost heater only. What years it applies to was unable to determine.

25-2343 05 00 00 MB number MB number unknown Dodge 5135680AA This heater also has one connector Plug used as a boost heater. What years it applies to unable to determine.

25 2091 05 00 00 MB number A0038308061 Dodge 5124687AA This heater has two connector plugs. A smaller two wire plug controls either a separate Espar water pump or is wired to control the MB installed pump differently then the boost heater system.

All of the delivered Espar heaters are marked with Espar and MB part numbers only. The Dodge number only exist on their data dase, which I found is totally inaccurate.

I was unable to find any straight forward differences between these units in downloaded manuals. All data (online manuals) has little difference (apparently based on existing Dodge DC manuals). Electrical and plumbing only shows one system’

I’m encouraged that you were able to clear codes with your timer, which disproves Espar North America statement that NAFTA Sprinter Espar heaters can only be diagnosed with DC DRBIII or Star. On contacting Germany Eberspächer (parent company) Confirmed tools are available to check the heaters ECU without DC’s equipment. Out of warranty these units can cost approximately $1400 to replace.

Apparently most have had good luck with these units. I, at 20K didn’t, and don’t want to be at the mercy of dealerships that don’t have the information or training to service them.

Your problem sounds really strange. it works “Aux” but not with the timer? If I had some good wiring diagrams it could be trouble shoot.

Anyone with more information then I was able find on this subject, please share!
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Old 10-22-2009, 03:33 PM   #8
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Default Re: Espar issues

Did some more troubleshooting last evening. Unit would start with the Aux switch, run for several minutes, then shut itself off. I waited about half an hour and tried the timer, which worked this time with the same results. Read the Espar T/S guide, best guess is to check the atomizer screen, flame sensor and glow plug. Pictures to follow after next look.
Several times in the past when starting with the timer, nothing will happen when the button is pushed. The fan would not run, fuel pump wouldn't thump, heater didn't spew smoke. A relay would click, then nothing. I reset the lockout funtion on the timer and it hasn't happened again - yet.
Bruce
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Old 10-22-2009, 05:42 PM   #9
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Default Re: Espar issues

Quote:
Originally Posted by bc339 View Post
Did some more troubleshooting last evening. Unit would start with the Aux switch, run for several minutes, then shut itself off. I waited about half an hour and tried the timer, which worked this time with the same results. Read the Espar T/S guide, best guess is to check the atomizer screen, flame sensor and glow plug. Pictures to follow after next look.
Several times in the past when starting with the timer, nothing will happen when the button is pushed. The fan would not run, fuel pump wouldn't thump, heater didn't spew smoke. A relay would click, then nothing. I reset the lockout funtion on the timer and it hasn't happened again - yet.
Bruce
Bruce,

Are you getting a fault code? Reference: http://www.espar.com/documents/diagn...nstruction.pdf
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Old 10-22-2009, 07:28 PM   #10
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Default Re: Espar issues

No, it displays RF:00, in the Espar codes means normal operation. Not!
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