Suburban Aire SA40 - Module and Limit Switches

1. Flue Limit Switch
2. Thermo Limit Switch
3. Module Board
4. Capacitor
5. Blower Housing

Please be verry cautious when servicing the Capacitor(4). Even with the power disconnected from the unit, the capacitor still holds a charge.

The Flue Limit Switch(1) shuts off the gas to the main burner if the furvace exhaust or intake becomes restricted.

The Thermo Limit Switch(2) shuts off the gas to the main burner if the furnace becomes too hot to operate safely.