New Bunk heater issue

[BrandonOlsen]

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!