Stormin Mormon wrote, on Sat, 20 Dec 2014 09:45:08 -0500:

In any case, please try shutting off the power
for 30 seconds or so, and turn it back on. Some
times that handles nussiance trips.

I turned the power off and then after a few minutes, back on.
Nothing changed.

I tried to check voltages, but I don't know what to test:
https://c4.staticflickr.com/8/7550/1...abb172d6_b.jpg

The model is Bryant 373LAV024070, input 69,000BTU, output 66,000 BTU:
https://c4.staticflickr.com/8/7568/1...8fa24051_b.jpg