Icon
Reliable Heating and Cooling Solutions – Quality Service, Fair Prices, Guaranteed Satisfaction!

Rheem Furnace Error Codes

Updated · by Aurora Star Tech Inc.

40 Rheem Furnace error codes and diagnostic codes, with causes and troubleshooting steps for each. Select a code, or find your model below.

Homeowner with a furnace problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Rheem Furnace error codes list

CodeMeaningSeverity
1 blinkSoft lockout (failed ignition)High
2 blinksPressure switch circuit openMedium
3 blinksLimit circuit openHigh
4 blinksPressure switch circuit closed (stuck closed)Medium
5 blinksTwinning fault (optional)Low
6 blinksLine and neutral reversedMedium
10One-hour lockoutHigh
11Failed ignitionHigh
12Low flame senseMedium
13Flame lostHigh
14Unexpected flameCritical
20Twinning faultMedium
22Main limit openHigh
23HALC limit open (HALC LIMIT OPEN)High
26Line and neutral reversedHigh
33Rollout switch (MRLC) openCritical
44Low pressure switch closed (stuck)High
45Low pressure switch open - inducer high speedHigh
46Low pressure switch open - inducer low speedHigh
55Pressure switch stuck closedHigh
57Pressure switch stuck openHigh
58Water sense circuit openMedium
59Water sensed / blocked drainHigh
60Blower fault - running (BLWR FLT-RUN)Medium
61Blower fault - blower not runningCritical
66Blower overspeed (BLOWER OVRSPEED)Medium
68No blower communication (NO BLWR COMM)Critical
82Supply air sensor fault (SA SENSOR FLT)Low
93Internal control faultCritical
d1No shared data (NO SHARED DATA)Critical
d4Memory card invalid (MEM CARD INVALD)Medium
d5Card/hardware conflict (CARD-HRD CNFLCT)Medium
d6Blower HP conflict (BLWR HP CNFLCT)High
d7Blower manufacturer conflict (BLWR MFG CNFLCT)High
d8Old shared data (OLD SHARED DATA)Medium
Flame LED offNo flame sensed (troubleshooting aid)Medium
Flame LED rapid blinkAmber flame LED - unexpected flameCritical
Flame LED slow blinkAmber flame LED - marginal flame senseMedium
h flashingCalibrating (CALIBRATE-NO V)Low
rLockout indicatorHigh

Find codes by Rheem model

Rheem 90RJ/90TJ 90 Plus

90RJ0490RJ0690RJ0790RJ0990RJ1090RJ1290TJ0490TJ0690TJ0790TJ0990TJ1090TJ12

R95P

R95PA0401317MSAR95PA0601317MSAR95PA0701317MSAR95PA0851521MSAR95PA1001521MSAR95PA1151524MSA

Rheem/Ruud 802P / 80MDP 80% two-stage furnace (UT 1028-928 IFC)

R802PA050314MSAR802PA075417MSAR802PA100521MSAR802PA125524MSAR802PA150524MSA

RGPE/RGLE

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

Rheem (-)GRC/(-)GTC 90 Plus

RGRC-04EMAESRGRC-06EMAESRGRC-07EMAESRGRC-07ERBGSRGRC-09EZAJSRGRC-10EZAJSRGTC-04EMAESRGTC-06EMAESRGTC-07ERBGSRGTC-09EZAJSRGTC-10ERBJS

Rheem RGRM/RGTM 90 Plus

RGRM-04RGRM-06RGRM-07RGRM-09RGRM-10RGRM-12RGTM-06RGTM-07RGTM-09RGTM-10

Furnace troubleshooting guides

Rheem Furnace specs and setup data

Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Emergency Furnace Repair

647-657-2977