could you tell what 6 blinks after flame failure means? thanks

Sure help to have the furnace model and a serial number. The component you posted is common to many brands. Are you sure you read those error codes correctly? There should be a chart and instructions on the inside door of the furnace.

Comfortmaker GNI060AO12A s/n L922558820 no code legend in unit

Could not find this model on the company websight using your data but I will provide the site.

https://www.comfortmaker.com/en/us/products/gas-furnaces/Comfortmaker GNI060AO12A s/n L922558820

It also has a number for a expert service, and a number of guides for specific issues as the provided model number didn't match any searches but it could be old and outdated or the numbers have changed or the model discontinued. Since there is a process involved to check your components and identify the specific problem, I recommend a professional, rather than just changing parts, because that's EXPENSIVE and time consuming.

It could be small and simple, or time for a new furnace and everything in between. This is also what else I found and some is related to the control sensor you referenced.

https://www.diychatroom.com/f17/comfortmaker-rpj-ii-furnace-blinking-6-times-342546/

Googled comfortmaker furnace error code 6< lacking a matching model number for above links.

And

https://www.ebay.com/p/1423834108

https://i.ebayimg.com/images/g/ZyAAAOSwpdJdwffY/s-l640.jpg