Webasto Heater Problem. Help?...

i bought a truck with webasto cooler but the small container mounted outside is embty , do i fill it with coolant?

 

For my Espar ive been told by Thermoking to run the unit a few times per winter and at the end of heater season on straight kerosene to burn the carbon out.
I buy a gallon jug of kerosene tie it up under the sleeper and run a 1/4 inch gas line from the fuel pump long enough to reach the bottom of the jug and run it overnight...i know that wont help you now but could help you prevent future problems

 

Just had a tech look at my 2000st heater, found that the control unit, (THE BRAIN) if you will, was dysfunctional.
Called Webasto, got a part number, found a dealer, got the price, $565.00 plus had to wait a week for the part to ship.

I'll idle my truck...

I am very frustrated, seems we are sitting ducks for repairs and service.
Like we make millions driving these rigs.

 

I just started getting code f12. I've tried pulling the fuse to reset it, a couple times. But every time, when you turn the knob on, it immediately goes into fault mode. Any ideas?

 

Ive got espars. Asuming close to the same design, ive rebuilt mine. Very easy to work on. A few weeks ago bunk heater wouldnt start. Fan came on. Tried to ignite. Shut down. Problem was exhaust broke off to close to the unit and fresh air intake was sucking in exhaust. Not enough 02. Napa stocks 1 1/8 flex exhaust. 3 bucks i think.

 

Thanks. Didn't have enough winter treatment in the fuel. Failed to start 3 times, so it threw code f12. Had to pull fuse while unit was switched on, then shut it off b4 plugging fuse back in. That wiped the codes and reset it. It's working fine now.

 

I am getting 3 flashes followed by 6 fast flashes. it will turn on and work for a while but then it just blows cold air.
Just bought this truck and it -27 out at night. Any ideas?

 

I don't know about the flashes but i know if it gets too cold the fuel will gell. Them bunk heaters don't run very thick fuel lines. So it don't take much to gell. If you're hanging out in extreme cold. Be good idea to use some type of fuel additive to prevent gelling.

I've had a few nights where i had to idle the truck because the bunk heater didn't work. The next night it would work.