Blower runs continuously, led blinks 3 times fast and 3 times slow. I assume it is it 3111.

I think this would be a 33 error code. For more info, please refer to the chart in this post (https://www.askmehelpdesk.com/heating-air-conditioning/carrier-furnace-error-codes-316760.html).

Best of luck,
WallyH