wildebus
Forum Member
The first heater I got did that and it was the fan hitting the cover. You could take the cover off and see if the "shims" to align the cover are still in place? (I say "shims" - on the heaters I have had they have been bits of cardboard ripped from a box and pushed in place).Latest up date: heater has now started to squeal from inside the cover, I have contacted the seller, shall report on how I get on.
Whether it is an alignment thing or not, I think the only thing that could squeal in the heater would be the fan - if you want a replacement, I still have my first heater (kept for spares) and you are welcome to have the fan from it.
In fact, if you wanted, you could take the whole heater and see if you want to get it working? I think you have the knowledge to sort it out.
It never worked reliably ever due to a couple of things and by the time they were sorted (such as the fan alignment), I think it may have got too choked up and ended up just smoking instead of burning fuel and heating?