On Tue, 10 Dec 2013 23:46:25 -0600, The Daring Dufas wrote:

The small cylindrical thing with a red tip on one of the wires is a "one
shot" thermal fuse and if temps get too high it will pop. It's in series
with all the other safeties and will kill the control voltage. ^_^

Thanks. I've identified four safeties:
1. The lockout timer (still not sure what its specific role is)
2. The fusible link
3. The vent safety shutoff switch
4. The limit switch

Luckily, all four must be working fine, since the heat is on!
Woo hoo!
http://farm6.staticflickr.com/5538/1...e1b81768_o.gif