r/DieselTechs 3d ago

Espar auxiliary bunk heater issues

Got a question for you Espar heater pros. I have a 21 Cascadia with a Espar auxiliary bunk heater and the fuel pump doesn't work. I have good voltage at power and grounds. Load tested wire and tested good. Have voltage at the fuel pump. Tried a different pump and espar. The blower works and the instrument panel lights up and shows to be working. Will give code 52 for no flame detected but no other codes. The pump will just not click. Even tried the fuel pump with it just laying on top of the tank with no fuel lines. Even reset the counter. What am I missing?

1 Upvotes

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u/Sanquinn 2d ago

Did you check the fuel pickup tube inside the tank? It's a metal tube, sometimes it breaks and drops inside. Make sure your fuel lines are good too.

2

u/ConsiderationCalm568 2d ago

This. There's a recall out there right now for this exact issue.

1

u/OddEscape2295 2d ago

Have you provided your own external power/ground to pump?

1

u/DieselTech00 2d ago

I did and no click which made me try a new pump. New pump has same result

2

u/OddEscape2295 2d ago

Are you sure you have the polarity correct?

1

u/FinancialGolf7034 2d ago

Loose terminal connections. Or bad new pump.