Like everyone else I got weak whistle steam from my Triplex. But the main & rear stacks were smoking like crazy.
When I looked down the whistle opening, I could see a bit of black covering the hole, but it was not totally blocked.
So, I decided to take it apart find out what's happening.
Just FYI taking this thing apart is quite the adventure.
A few things I discovered:
1. It is a straight tube from the smoke unit to the outlet and there was No residue in tube, so it was not blocked. I blew through it lightly and it was totally clear.
2. The smoke unit batting was fine and was saturated on both sides.
3. There was a tiny almost O-ring (although much thinner) between the outlet and body that was pinched and partially blocking the hole.
So, I fixed the seal.
Soaked the batting in both chambers.
Checked thermistor was not too close to resister and reassembled.
Ran it again and it was better and as others reported it takes a while to get going. It works fine if you are constantly blowing the whistle, but if blowing occasionally then the first blows are almost nonexistent smoke.
So, I would say some type of design issue with Whistle side. Seems like resister is not staying hot enough.
Guess the triplex will just have weak whistle steam. What do you want for 2200.00! HAHA.