My VC 2040 Cat has air supply problems. And they are different from what I've read about in various places here on the forum.
First, I cannot get the primary air to shut down completely. I have checked gaskets and have confirmed that the mechanism does close shut when I close it down. Still, the flame continues as if I haven't shut it down. So it would seem that there's a leak somewhere, but I cannot find it.
But here's what makes it so puzzling. When I close the damper to engage the Cat, it's almost the opposite situation. If I reduce the primary air, it will back puff. So I have to run the stove at 75% open for it continue to work without belching. I can't get it to go for a slow burn. The catalyst is clean. I've had various stoves over the last four decades, some of them with Cats, and this one is such a puzzle!
First, I cannot get the primary air to shut down completely. I have checked gaskets and have confirmed that the mechanism does close shut when I close it down. Still, the flame continues as if I haven't shut it down. So it would seem that there's a leak somewhere, but I cannot find it.
But here's what makes it so puzzling. When I close the damper to engage the Cat, it's almost the opposite situation. If I reduce the primary air, it will back puff. So I have to run the stove at 75% open for it continue to work without belching. I can't get it to go for a slow burn. The catalyst is clean. I've had various stoves over the last four decades, some of them with Cats, and this one is such a puzzle!
