HVAC Technician
35 years experience, HVAC
Tempstar about 4 t0 5 years old.... N9MP1 or 2
*9MPD
we have a pilot, it is usually lit,, it must be automatic?
If it is always on that would be standing pilot but by what i'm reading I think your is automatic lighting. So lets try to fix this do see a pie like round object that has rubber or vinyl hose attached to it also maybe two wires by the induced draft fan
If you have located this switch clean the hose and the ports that they attach too so that air can be sensed correctly
OK Then call for service again and good luck