Rheem · Furnace

h flashing Calibrating (CALIBRATE-NO V)

Low severity RGPE/RGLE

What the control is telling you

Lower-case h flashing. Per the troubleshooting chart, H/h should be steady during a heat call; if it is flashing check the dipswitches / test mode.

Applies to: RGPE/RGLE 2-stage 80+

Likely causes

Dipswitch or test-mode setting
Calibration in progress

Test and repair steps

Note the original dipswitch settings before changing anything.
Check the test-mode dipswitches and that test mode has not expired (1 hour limit).
Check the SW1-SW3 settings against the manual tables.
Verify on unit allow the cycle to continue and confirm h goes steady.

Settings for these units

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

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Source: RGPE/RGLE: Table 16 p.49 / Table 20; Fig. 45 p.63. 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.