[nochaos]

Here's some new food for thought....
I'd appreciate another opinion, please.

I have a NEW behavior that is even more urgent... it looks like the burner won't stay on as the GV is released.

Here's a description of the new behavior. I'd appreciate an expert advise, before I (really) rush to buy the controller.
Thanks

NEW BEHAVIOR:
- the thermostat calls for heat
- the inducer and APS do their job, while the LS and ROS are closed. As a matter of fact the 4 above are closed at all times (after TS calls for heat). Just small variations (likely due to amp/consumption variations when HSI lights, and then when the GV opens).
- the voltage on the inducer is ALWAYS around 120V. The reason I am highlighting the above is that it is supposed to drop to 24V after the gas is burning, transforming itself in a flame sensor.
- (Most likely) as a result of the above the GV closes after a few mins of gas burning, while the blower remains ON.
- while the blower is still on the ignition-to-GV shutoff cycle happens TWICE
- After the 2nd GV shutoff the blower is shutdown. The inducer stays on, the LS and ROS stay on. The 110V on HSI is on. No trace of 24V on the hybrid HSI/IGN at any time.

I am not sure if this new behavior is related to the previous one, related at the beginning, but regardless... this seems to be even more urgent, as the furnace seems to struggle to stay on.

The main issue seems to be the IGN voltage remaining at pre-ign/ ign level = 120V. After IGN it is supposed to drop to 24V, which it does not. The drop is just of half a V or so.

So, what's up with this dual mode IGN/Flame Sensor thing? Is it defective (or dirty) OR is the controller to blame? I believe that it is a controller issue.

What do you think? THANK YOU
Thanks.