HVACopedia

Rheem · Furnace

d8 Old shared data (OLD SHARED DATA)

Medium severity RGPE/RGLE

What the control is telling you

Memory card is from an older furnace and lacks newer critical shared data. Table 16 lists d8 twice - one entry also alerts the homeowner (Call For Service / CHECK FURNACE).

Applies to: RGPE/RGLE 2-stage 80+

Likely causes

  • Outdated memory card

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.

Settings for these units

Filter sizes as shipped, upflow (Table 19) · RGPE/RGLE

Cabinet widthInputBottom filterSide filterQuantity
17-1/2 in.50, 75 (000 Btu/h)15-3/4 x 25 in.15-3/4 x 25 in.1
21 in.75, 100 (000 Btu/h)19-1/4 x 25 in.15-3/4 x 25 in.1
24-1/2 in.125 (000 Btu/h)22-3/4 x 25 in.15-3/4 x 25 in.1

Use one filter location only - do not double-filter or filter the supply side.

21 in./100K: cut 3-1/2 in. off filter and frame for a side filter; 24-1/2 in./125K: cut 7 in.

Reduced clearance to combustibles (Fig. 3 and 4) · RGPE/RGLE

Model sizeCabinet width (A)Left sideRight sideBackTopFrontVent
RGPE upflow/horizontal 0517-1/2 in.0 in.3 in. (note 2)0 in.1 in.3 in.6 in. (note 3)
RGPE upflow/horizontal 07(A)17-1/2 in.0 in.3 in. (note 2)0 in.1 in.3 in.6 in. (note 3)
RGPE upflow/horizontal 07(B), 1021 in.0 in.00 in.1 in.3 in.6 in. (note 3)
RGPE upflow/horizontal 1224-1/2 in.0 in.00 in.1 in.3 in.6 in. (note 3)
RGLE downflow 07(A)17-1/2 in.0 in.3 in. (note 2)0 in.1 in.3 in.6 in. (note 3)
RGLE downflow 07(B), 1021 in.0 in.00 in.1 in.3 in.6 in. (note 3)
RGLE downflow 1224-1/2 in.0 in.00 in.1 in.3 in.6 in. (note 3)

Note 2: right side may be 0 in. with type B vent.

Note 3: vent clearance may be 1 in. with type B vent.

Models that show this code

10 models in RGPE/RGLE

RGLE-05(-)BMKRRGLE-07(-)AMKRRGLE-07(-)BRQRRGLE-10(-)BRMRRGLE-12(-)ARMRRGPE-05(-)BMKRRGPE-07(-)AMKRRGPE-07(-)BRQRRGPE-10(-)BRMRRGPE-12(-)ARMR

Other codes on the same units

  • 93 Internal control fault
  • d1 No shared data (NO SHARED DATA)
  • d4 Memory card invalid (MEM CARD INVALD)
  • d5 Card/hardware conflict (CARD-HRD CNFLCT)
  • d6 Blower HP conflict (BLWR HP CNFLCT)
  • d7 Blower manufacturer conflict (BLWR MFG CNFLCT)
  • h flashing Calibrating (CALIBRATE-NO V)
  • r Lockout indicator

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: RGPE/RGLE: Table 16 p.49 / Table 20; memory card rules p.38-39. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.