One tank ran dry, so I moved to the other tank—the furnace did not turn on. Then I filled the empty tank—the furnace will still not turn on. The pointer is pointing to the full tanks (both are full now) and I've moved the thermostat from on to off several times.
Any ideas?
(By the way, I searched for "Furnace does not turn on", "Gas does not turn on and no heat and got posts on axles and other things).