Enviro FPI running hot but not tripping switches

[arhyne]

I'm looking for some advice or insights regarding my Enviro FPI pellet stove. I've had this unit since we installed the insert back in 2010 (it's a 2009 model). Over the years, I’ve updated it with newer circuit boards and replaced the combustion fan/motor and circulation blower a few years ago.

This season, after firing it up for the first time, I’ve noticed that it feels like it’s running hotter than usual. Specifically, the back end of the insert (pellet hopper area, etc.) is noticeably hot, which hasn’t been the case before. Despite this, none of the safety switches are tripping.

I always make sure to keep the stove clean:

• I do several good cleans throughout the season.
• At the end of the season, I tear it down completely, clean out all the ash
• I always sweep my pipe (25 feet, straight up) a few days before firing it.

This year, I’m running it on settings 1-3 as usual. I keep the combustion fan trimmed all the way down and the exhaust vent mostly closed but not entirely, just enough to ensure it can keep running on the lowest setting. Usually, it takes me a couple of days to dial in the airflow when it’s this clean—getting it just right so it can maintain operation at the lowest level.

Given the increased heat, I’ve tried a couple of adjustments:

1. Increased the combustion trim.
2. Opened the exhaust vent a bit more.

While these tweaks seem to help, I’d like to better understand what the exhaust temperature should ideally be. I’d also love any insights into optimal settings to keep it running efficiently, particularly on the lowest setting this time of year.

For context:

• I typically run the stove 24/7 at Level 2 during winter, bumping it up to Level 3 on really cold days.
• Right now, I need it to maintain Level 1 operation without overheating or running inefficiently.

If anyone has the specs for exhaust temperature or any advice on fine-tuning this stove, I’d greatly appreciate your input!

Thanks in advance,

Andy