Thermocouple replacement - older Green Colonial Furnace
I'd really appreciate some assistance in how to go about replacing the thermocouple in a rather old Green Colonial furnace. The thermocouple is looking very scorched and will not keep the pilot lit. I've managed to unscrew the fitting from the small tube at the bottom but am not sure if the thermocouple needs to be unscrewed from the bracket. Here's an image:
http://dmvrscca.org/thermocouple.jpg
Thanks in advance,
Ric Johnson
Des Moines, Iowa