Espar bunk heater

In my bunk, the fan is a separate function. There should be 3 functions..a/c, heat and then fan. Don't turn the fan on when you hit the heat button. Not sure if you've already tried that? The espar takes a few minutes to warm up and start cranking out heat. There's also an internal thermostat in it, so keep your curtains open or anything you may have on the floor away from the heat vent because it'll just deflect the heat back towards the espar making it think it's warmer in the truck then it actually is, and it'll shut down until it gets "cold" again. Hope this helps?

 

My old one did that before it had to be replaced then the replacement espar did the same thing & they realized it was faulty and had to replace it again. Has it worked correctly at all since the install? I'm curious if they even tested it out before sending you on your way. I'd get a hold of the dealership. They should be able to have you just bring it into any other Freightliner location to get you fixed.

 

sounds like it not getting fuel would check fuel lines also check fuel pump it should be clicking on start up but do you have the temp set for 90 it might be shutting down because the temp setting. It not wiring cause it trying to start and running and they try twice then shut down that the way espar programs them.

 

They’re mostly garbage, my company is getting rid of the tripacs because of them. Mine kept doing that last couple months, especially at high altitudes, until finally they got me through a thermo king dealership, they had to do a yearly pm on it which meant taking apart & cleaning the burner & fuel intake due to carbon build up. After that it’s worked fine since... at least for now.

 

according to Espar D2/D4 manual the units must be turned on every mount for 15-30 minutes to have glow pin clean not corroded. Every mount , summertime, wintertime...

 

You might have a cracked fuel line letting in air so its not getting fuel.