my airtop 3500 has locked out on code 7 on metering pump interrupt or metering pump short circuit. i have checked fuel line and filter no blockage. can anyone help as it is cold.

j smith, January 2010

Tim Stubbs.
You sound like you have good experience with the webasto heater.
I wonder if you can help med with my problem:
My Webasto Air Top 3500 Diesel PN MY30CFD-2 will not start.
The LED lights works. 2 selection; "heat" and "cool" + one potentio meter. The "spark plug" works but the fan is not moving!
I have had 2 corroded wires, that broke off. I have fixed them, but no change.
I am suspecting the controlbox or even the whole harness.
Do you have any idea what the fault is??
It is on my Sea Ray up here in Greenland.
Hoping for an answer.
Best regards Mads Peter

Mads Peter Heiselberg, May 2010

hey there. The fault u have is in the wiring that goes to the fuel pump. There will be 2 black wires running out from the airtop unit and back to the fuel pump which is usually near the fuel tank. There maybe be a plug connector somewhere along the route of this cable-check that 1st. Had this problem on mine a few weeks ago and sorted it now i have fault code 1? Van has been stood for a while and maybe out of fuel. doh!
Should u want to reset ur unit simply turn on the unit and then turn it off after 3 seconds, then turn it on again, then after 3 seconds turn it off again. This resets the unit.

tim stubbs, February 2010