My Norcold N621 won't start....
I've cleaned the burner and jet..
I have ignition...and gas supply....
I can light it manually...runs long enough
to bring it to desired temp...when it reaches set temp..
it shuts off as it should..then the "F" trouble code
shows and will not relight on it's own..
The "F" means no flame. You light it manually, does that not indicate to you, that you have a problem with the gas lighting system????? Either the Spark Electrode or the Control board is defective. Doug