Espar (Eberspacher) D2 "No Signal" After running for hours

JFloFoto

Active member
we solved our issue! Turns out a connector was missing the orange wedge thing that separates the pins, and after conversing with our dealer, we stole one from an unused connector and everything is now working fine!

It would be helpful to all if you would provide pics of this 'wedge'.
 

tothebeyond

Member
It would be helpful to all if you would provide pics of this 'wedge'.
Good point! But we are NOT taking the wedge out, as it's finally working right. lol. Here is the picture - it's simply that orange insert that keeps the pins separated - on the opposite side of what is pictured, it has a tiny grip area where you can hold it and push it into the connector, carefully being sure the pins are going in to their respective holes. If that insert is missing it's easy for pins to touch if slightly bent, apparently. My partner did all the discussion with the dealer but I was in on most of it. I hope this helps.
 

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tothebeyond

Member
Glad you solved the issue....can you expand on what connector?
see above in the thread, as someone else asked so I attached a photo. These should be in several of the connectors, though not all, depending on the type they are. This connector was to our smart controller, gray with the orange 'wedge'.
 

Wheeljack

Active member
In preparation for an upcoming trip, and because I haven't fired the heater for many months, I figured I'd fire it for a while at full power just to make sure its working and give it a nice hot burn off.

Press the start button on the Easy Start Timer, and 'NO SIGNAL' is displayed. Hmm. Weird. Never had an issue like that and heater has been installed and running for several years now. Of course, it immediately makes me think communication and then the wiring. But what has changed? Obviously the EST is still getting power to show 'NO SIGNAL'. So looking to the wiring between EST and heater unit. I was recently on some pretty rough roads that could have jostled a wire or connector loose I suppose.

I ended up pulling the seat and swivel, and finding the 3 wire connector coming from EST. Pulled it apart, looked good (clean, no corrosion), but blew it out, and reconnected it. I take a look at the EST and now is showing 'INIT'. So looks like it just re-recognized the unit again. Full menu is back on the EST display.

So with it seemingly fixed, I fired it up and gave it a good run. Hopefully we'll not run into this again anytime soon.

The moral of the story:
'NO SIGNAL' was fixed by disconnecting and reconnecting connector for the 3 wires between EST and heater unit. Leads to diagnosis of bad connection in connector due to vibration.

Hardware Configuration: Espar D2 24V with 12/24 boost supply, Easystart Timer, High Altitude Kit

Plenty of helpful tips in this thread to get me heading in the right direction with the initial troubleshooting.

As always, YMMV
 

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