I've got an older "Day and Night" natural gas furnace in my home, model #800-19a. Setting the mercury thermostat turns the blower on, the standing pilot is lit, but the burners do not ignite.
After doing a little online research, I suspect it might be a bad thermocouple, which is a relatively easy fix. But I thought I'd run this by the good, knowledgeable people of this newsgroup first.
Is there anything else I should look at?
-Frank