Still troubleshooting Webasto
Replaced all three sensors and the heater still did not kick on (same issue as before). Will test in the morning to see if it still kicks on when it’s cold outside. On to next phase of troubleshooting. Will purchase the test box to see if i can isolate the problem.
I went through the invoice notes from Marathon from October 2022, and it stated the following,
”Ran unit, it fired but smoked heavily. Performed complete service. New fuel nozzle and filter, cleaned photo eye, repaired fuel leak on supply line. Ran unit on 12V heat and 12V water heater until unit cycled. Unit now working as it should. Next morning unit failed on third firing. Tested with no signal from ignitor. Bled system of air so it would not overheat. Fired and ran for 2 hours on water heater.”
Two things stick out. One heave smoke. I had noticed it as well when it works. It is white smoke only on initial cold startup. Second was no signal from ignitor.
Will clean the electrodes ignition sensor tomorrow and see if that replicates what Marathon found. Something to do while I wait on the test equipment.
Regards, Shahzad
Last edited by shahzadlateef; 01-10-2023 at 07:22 PM.
Shahzad Lateef
2003 Marathon H3-45
Double Slide