Drolet Heat Commander Damper/Stepper issues?

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sleewok

Member
Jan 27, 2021
82
USA
Hey all,

This season (and sometimes last season) I have noticed that when I press the button to do a load I can hear one of the steppers skipping every so often (it isn't every time I do a load). It sounds like it wasn't in the position that the system had it set to and it is trying to do "something" that it can't. Clearly something is wrong and this is not the correct behavior. It is likely causing issues with the efficiency. I have the new dampers that have the white plastic on it.

There are two situations I am experiencing. One is too fast of a burn when heat demand has been met. The other is not enough heat when demand has been met and there is big pile of coals. It's like it just shuts down.

A few times I've stuck a wire in the fresh air slots and pushed the left damper (when facing the door) and it will sometimes snap shut. Other times I can force it, and then it will return to the position.

I'm not sure if it is related, but the green light will go off randomly until I completely power cycle the HC. I have some coals burning now and the plenum is HOT. The green light is off, no blinking, nothing. When it calls for it it does send it, but the light...ugh.

Does anyone have any idea what is going on? Should I spray some lube where the damper slides? Is there a firmware update? It doesn't matter if I power cycle. It will eventually do it again.

Hopefully I can get this figured out.

Thanks!
 
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