Help with combustion air

I just bought a 1990 Whitfield Advantage II-T. The combustion air feeds the fire with too little air when I have the pellet feed on the lowest setting ("1" being low and "5" being high). When I turn the pellet feed on "5", combustion air being pulled through pellet bin increases dramatically and well enough to keep burning the pellets and with a "dancing" flame.

I found it odd that combustion air increases and decreases with the pellet-feed adjustment. Is this normal?

I have the damper full-out to maximize the combustion air being pulled through the pellet bin but it is still not enough to keep the pellets burning. Within 3-4 hours of burning pellets at the low "1" speed, too many un-burnt pellets choke out the fire and eventually the stove shuts off. Flame is "lazy" and obviously not recieving enough combustion air at the lowest setting.

If I can increase the combustion air during the lowest pellet feed setting of "1", I think my problems will be solved. Is there a way to adjust the combustion air? There appears to be 3 adjustment screws hidden behind buttons on the control panel. I presume these 3 screws are there for a purpose but being hidden behind some buttons, maybe I'm not suppose to be there. If there is no way to adjust the combustion air flow-rate during the lowest pellet feed setting, do you have any other suggestions?

This stove is now in my daughters 900 s.f mobile home and a pellet feed above 3 will blast her out of the little home except during the colder of cold days. 80% of the time, she will rune her stove on the lowest setting of "1" if I can get her enough combusiton air.

Les Parks - [email protected]

Thanks for the good information posted so far. I had already checked the combustion fan as one of my first processes of elimination. It blows air like there's no tomorrow when I hook it direct to 110V. But as soon as I hook it back up to the stove and turn the pellet feed on low, the combustion fan speed drops way down and hence, not air to feed teh fire. The one gentleman says it can be adjusted...now I just have to figure that one out...thanks guys!

My fix ended up being really simple...the three buttons, when pulled off, reveal three adjustment screws. The top screw adjusts/fine tunes the speed of the auger. The second screw adjusts the combustion blower speed...just what I was looking for. When I turned the screw for the combustion air to a higher position, my pellets burn like they should on the low auger speed setting. Problem Solved! You guys are great!