stuart_tawn3 wrote:

Unfortunately I do not know the model numbers, but they both have a
round tank about 125mm high and 300mm in diameter. One heater has two
vertical heater eliments and a cross convector between the two and the
other has one vertical eliment with a up side down half round
convector on the top that pivots. None of the heaters have any brass
fittings on them.

Your heaters don't seem to be the same as the one I had a problem with -
sorry. I can only suggest (just guessing) a build up of carbon might be
causing the problem. Not sure but perhaps new wick units might be
available?

Sorry I can't be of more help.
--
Regards,

Trøy the Black Lab.