The 31 error code is indicating that the pressure switch is open. This switch must close before furnace can light.Would you prefer to Google solutions for an open pressure switch or would you like personal guidance here.
Researching takes time and our experts are paid for their time assisting by you rating the answers when finished.I am a licensed heating contractor with 47 years experience and I use Google everyday.Very thankful for Google and not ashamed to let you know during our conversation I may Google furnace model to make sure information is accurate for your unit and assist if we need to find a part number.
So the answer to your question is that the issue is not with thermostat. The light by W indicates the pressure switch is stuck open.
You can Google "solutions for an open pressure switch on Bryant furnace model XXXXXXXXX .(Model will be on a label inside furnace.
I also am available for step by step guidance in troubleshooting the problem if you are interested for a premium service fee.
Otherwise ,as mentioned you can find many videos and blogs on Google to assist you.
If you have further questions, please let me know.
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