okay I'm commerciall don't remember the sequence for a res. furnace, but...I got a 20 yr. old 90% that's in good shape, no gas valve voltage; trial for pilot- good nice pilot flame; this has a pilot module which has 3-wires which .apparantly switch the voltage from the pilot solenoid of the gas valve over to the main valve...I don't think it is necessary to check millianps,or such, it appears it is bi-metal and physically swithes over once pilot is lit. The dang thing is not swithing over so do I replace the pilot "module" and does this come in one piece. As you know it is not a easy process to remove,inspect,re-attach said components.Any help,background would help..
payne plus 90 circa 1985