d1 No shared data (NO SHARED DATA)

What the control is telling you

No valid furnace shared data on the memory card or network; furnace will not run in any mode. Level 2 fault. Thermostat also shows Call For Service / CHECK FURNACE to the homeowner.

Applies to: RGPE/RGLE 2-stage 80+

Likely causes

• Replacement IFC installed without the original memory card
• Card missing/invalid and no copy on the communicating network

Test and repair steps

1. Check whether the original memory card is attached to the IFC or inserted in connector J15.
2. If the IFC was replaced, break the original memory card off the old control and insert it in J15 of the new one.
3. Warning: Never swap memory cards or controls between furnaces or from a condenser/air handler - wrong data can cut heating airflow and trip the main limit.
4. If the original card is lost, order the correct replacement memory card for this model from ProStock and insert it in J15.
5. Communicating systems confirm the model in the furnace user menu under Unit Info matches the rating label.
6. Replacement controls from ProStock carry no shared data and cannot be programmed in the field.

Settings for these units

• Filter sizes as shipped, upflow (Table 19) · RGPE/RGLE
• Reduced clearance to combustibles (Fig. 3 and 4) · RGPE/RGLE