Trane ACONT900AC43UA Service Manual page 187

Communicating Gas Furnaces
Section G
Purpose of the flame roll-out limit switch ......................................................................................... 2
Electrical circuit ................................................................................................................................. 2
Troubleshooting ................................................................................................................................. 3
Using ohmmeter ............................................................................................................................. 3
Using voltmeter .............................................................................................................................. 4
Causes of flame roll-out trips ........................................................................................................... 4
Flame Roll-Out Limit Switches
GF - G 1