Replacing the Ignition Modules

The ignition modules send 24 volts to the ignitors and gas valve.

Two different modules are in the field.

The White Rogers modules have a red LED, and the Robershaw modules have a green LED. These LEDs help to identify a failure.

For the White Rogers’ or Fenwall module, when the control calls for heat, the White Rogers LED will flash, then go out, indicating the control is functional. If the LED continues to flash, the module did not sense a pilot flame. If the LED stays on continuously, an internal fault has been detected, and the module should be replaced.

For the Robertshaw, when the control calls for heat, the LED will be on continuously, indicating the control is functional. If the LED flashes, the module did not sense a pilot flame. If the LED goes out while the control is calling for heat, an internal fault had been detected, and the module should be replaced.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

NOTICE -

To avoid property damage, do not tamper with this component. It is factory sealed and should not be adjusted.

Remove the electrical power supplied to the unit.
Remove the control panel
Remove the condensation drain pan.
Using a crosshead screwdriver, remove the screws securing the module cover and remove the cover.
Label and remove the wires from the module.
Using a 3/8” socket and crosshead screwdriver, remove the nuts and screws securing the module and remove it from the unit.
Replace with module in reverse order.