New Bunk heater issue

[BrandonOlsen]

(12-12-2022 )Waterloo Wrote:  

(12-12-2022 )BrandonOlsen Wrote:  I feel your pain. I have a espar heater in my truck that doesn’t work (D2) Fan turns on for maybe 5 minutes and shuts off. Pump doesn’t attempt to run or click at all. Then get the red light with 52 code. It’s never worked since I owned the truck and the previous owner never used it. They only idled. Hope you can have a little better luck than I usually get. Good luck!

eBay and or Amazon has all the parts to get your D2 running. There are two fuel filter screens, the one in the little fuel pump is likely clogged up. Then there is another screen in the D2 unit itself that more than likely needs replacing. Here is the repair kit I used, $35, it has the two filters you need. https://amzn.to/3PjPAJK

I would also purchase a new glow plug, you will be in there, replace it. I prefer the Espar OEM parts, https://amzn.to/3hhPOEI

Here is the exhaust and I bought another for the intake side, so two of these flex pipes https://amzn.to/3FmHOKO

This fuel line kit, mainly for the hose clamps, I broke a couple of them when removing the in line fuel pump. https://amzn.to/3FNfm5W

Here is a very good video on everything you will need to know on rebuilding and cleaning of your D2 heater. https://m.youtube.com/watch?v=56HCZ0C0ORk

I rebuilt mine in October, running like a champ!

Thank you sir!
Should I order a new pump for it as well? Or would one of those things cause the pump to click even one time ? Never had anything to do with an espar heater before so this is all new to me!

[Waterloo]

(12-12-2022 )BrandonOlsen Wrote:  Thank you sir!
Should I order a new pump for it as well? Or would one of those things cause the pump to click even one time ? Never had anything to do with an espar heater before so this is all new to me!

If the fuel pump is clicking it is working. If there is no sign the pump is working, test to see if there is voltage to the plug at the harness, where it plugs into the pump. If there is power getting to the pump, and no clicking sound, it more than likely is burned up. If the heater has been non functioning for quite awhile, I would purchase a new pump. Nothing worse than wanting heat only to have your questionable at best original pump fail. The pump is a piston setup, like a single cylinder moped, that is the clicking sound, the little piston moving back and forth, vs a centrifugal pump that uses an impeller.

[Nilao]

It will click even with plugged filters. If it isn't clicking you can use a 9v battery and jumper test leads to touch the terminals. Each time you touch it it should click as it uses 12 volt pulses to operate it. A 9v battery is low voltage but also low amp output to not burn it up while testing it.