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Resolved - flame sensor was dirty.

I've tried to see what manual says but codes explanation makes no sense based on what I'm seeing:

2 green > red > green/red

Manual can be found here:...

Code updates:

When furnace is not working (i.e temp is at the level) board codes are as follow:
20 green flashes
21st green/red

When I tried to start the furnace, I could hear it tries to...

Hi,

Having little problem with my furnace and with the temperatures going severe I thought to reach out for suggestions.

Two anomalies I'm seeing:

1) I've noticed that my furnace "randomly"...

lol

this can't be real?!

nice

They didn't have the tech at their prime. Wonder how we are going to look like in the next 20+ years.

lol

Done some research and dyson is a great company with hepa filters. Also comes with the app and schedules.

We have been using Dyson with hepa, good quality.

Did you guy hear about Tesla going into HVAC business?