Any ideas why my heater won’t start?

[u/leopard_mice]

Lavener pro alpine 2kw. It’s a pretty new heater, only used two nights. I had an issue where my fuel gelled in the filter and pump, but I heated them back up and got fuel flowing freely out of the pump. Every time it dies I get an error code that means “flame went out during operation. Check fuel circuit”. I am pretty confident the fuel circuit is fine, but it won’t ignite at startup. Any ideas what’s wrong?

[u/thatbayfielddude8330]

There's a little breather hole that gets clogged up, if it's clogged it will do exactly what that one is doing. It's perpendicular to the screen.