St. Croix convection fan doesn't change speed

I'm having an issue with my St. Croix Greenfield and the convection fan.

The current problem: When I change the level on my control board, the convection fan does not increase it's speed/force despite the LEDs light up with the next number as expected.

Leading up to this: I just replaced the convection fan because it seemed worn out. it started making a loud noise, kind of like a circular saw.. I pulled the old fan, cleaned it with an air compressor, put it back on and it was still noisy, so I replaced it.

Before getting the new fan and after trying to clean the old one and testing it is when I seem to remember the speed not changing when I increase the level... and it still is that way.. speed does not increase.

This is my first time posting here.

Thanks

KodiakII said:

I think the speed is just changed by raising the voltage from the control board. My convection fan is two wire so speed can only be increased by raising the voltage.
How is the stove running? The fan speed will not increase until the stove comes up to a higher temperature.

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Everything else seems to be running pretty good.. When I fired it up after putting the new fan in, it got nice and hot and was going a good hour and still the speed did not vary when I changed levels.. It usually responds much quicker after start up, and even in colder conditions.

Is there a chance there's a sensor messed up somewhere that isn't reading the temp increase and stopping the fan speed from increasing?

Oh, one thing I forgot to mention... upon staking up the stove, the convection fan starts blowing very strong for several seconds then slows down.. which is normal and it's still happening now. it just never speeds up again even when the level is increased.. I mention this strong blowing at start up since that would lead me to believe the unit is capable of delivering the fan a high enough voltage to increase the speed.

bogieb said:

This probably isn't the issue, but always good to check - is it perhaps in thermostat mode and either it isn't hooked to a thermostat, or the room temp is above the temp set on the thermostat?

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Thanks bogieb... It's a good thought and makes sense.. I kinda doubt it too since I never use thermostat... but hey, you never know when a switch gets flipped.. I'll double check when I get home, but I'm not optimistic for that to be the issue.

bogieb said:

This probably isn't the issue, but always good to check - is it perhaps in thermostat mode and either it isn't hooked to a thermostat, or the room temp is above the temp set on the thermostat?

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I was just looking through some older posts and one you commented on intrigued me:
https://www.hearth.com/talk/threads/st-croix-pellet-stove-on-light-flashing-on-high-no-heat.137574/

is it possible that the a wire from the control board came disconnected from the thermostat terminals when I was putting the back panel on, that would cause the stove to run in pilot mode? I'm at work now but i think that's something I need to check later.

Well, that was it... the thermostat wire was disconnected.. turns out that even when the stove is manual, the thermostat "loop" needs to be closed by either being hooked up to the thermostat or having a jumper to close the loop. Thanks for your input