Rheem Furnace Codes by Series

Key facts

How to find your series

The model number is on the furnace's rating plate. Rheem's manuals say so in one line: "See name/rating plate and clearance label for specific model number and clearance information." (92-24161-144-09, p. 8). They do not explain how to decode the model letters, so this page does not either. The current manuals print the brand letter as a placeholder, "(-)96V SERIES & (-)(-)96MDV SERIES", so match the letters and digits that follow it.

Ruud furnaces are made by the same company, but Rheem's documents don't list which Ruud models use these tables, so check your own furnace's installation manual.

How to read a Rheem code

On the display series a number is the code, and on the single-digit (-)801T and (-)801S/P display it arrives one digit at a time. Rheem's wording (92-24161-144-09, p. 39): "The method for displaying a two-digit fault is to display the first (most significant) digit for one second immediately followed by the second digit – which is also displayed for a duration of one second. A ½ second pause is then displayed. Cycle repeats until the fault is cleared. Each fault is flashed (displayed) a minimum of two times even if the fault condition has cleared before the fault can be displayed twice."

The same page explains the standby and mode letters: "During standby mode with no fault codes present, the display will read "0" (zero). During normal thermostat heating, cooling or continuous fan operation, a letter will be displayed to describe the mode of operation as follows: C = Cooling or Heat-Pump Heat Operation F = Continuous Fan Operation H = Gas Heating Operation". When two faults are present, the display alternates them with the top segment lit for ½ second between.

The communicating manuals add a warning worth reading before anything else (92-24161-124-12, p. 111): "NOTE: Verify display orientation is correct before interpreting fault codes. Otherwise, the fault codes may be upside-down. If a fault code or operating code is not on these lists, the display may be upside-down."

Lockouts and how they clear

Several codes are lockouts rather than faults in themselves: 10 on the display series, one blink on the LED series. Rheem's single-stage manual (92-24161-144-09, p. 40) says: "All lockout conditions can be cleared immediately provided that the original fault causing the lockout is cleared and power to the unit is cycled off and then back on again or (soft lockout only) if a heat call is cycled off for greater than 2 seconds but less than 20 seconds."

A one-hour lockout starts when "Flame has not been detected after four ignition trials", "Flame has been lost for five times in one heat call", "Undesired flame has been detected", "Dead Blower has been detected (main limit circuit open for more than 150 seconds)" or "When voltage has unexpectedly been detected on the gas valve circuit and voltage goes away when inducer is shut off." It "will automatically be reset after one hour". A hard lockout with code 93 "cannot be reset by cycling the heat call."

The older LED flowcharts give a power reset in a note (92-24161-49-10, p. 41): "NOTE: If IFC goes into lockout ("STATUS" LED will flash code "1"), shut off main power to unit, wait 30 seconds and then reset power." Clearing a lockout does not fix what caused it. A code that comes back is a call for a qualified servicer.

801T and 801S/P codes (80% single stage)

These 80% single-stage furnaces have one seven-segment digit and the shortest code list. The (-)801T manual 92-24161-144-09 and the (-)801S / (-)801P manual 92-24161-142-15 print the same table on p. 39, word for word, including the spelling "CONTINUOS".

Page 39 also sets out which pairs appear together: four failed ignitions show 10 and 11, five flame losses show 10 and 13, unexpected flame shows 14 and 10, and a dead blower shows 61 and 10, or 61 and 22 while the main limit stays open.

92T and 95T codes (90%+ single stage)

The condensing single-stage furnaces use the same list plus two water-sensing codes, 58 and 59, and print 22 as "MAIN LIMIT OPEN". Manuals 92-24161-154-03 ((-)92T) and 92-24161-120-16 ((-)95T) carry the identical Table 17, "90P 1 STAGE FAULT CODE LIST", on p. 87.

Table 20 of each manual (pp. 88–94) gives every fault a description, cause and solution written for the installer; it is not reproduced here.

96T codes (two stage)

The two-stage (-)96T adds a lower-case h for low-stage heat and splits the pressure-switch faults into low and high switches (44 to 57). It is also the only table here with a fault priority column; the manual's text says that when two or more codes are present at the same time, priority decides how they are displayed (p. 88). This is Table 17, "90P 2 STAGE FAULT CODE LIST", of 92-24161-157-04, p. 88, including its spelling "INIDUCER".

802V, 96V, 97V and 98V codes (communicating)

The communicating furnaces share one longer list, with memory-card codes (d1, d4, d6), separate main limit and HALC codes (22, 23), an open fuse (30) and blower codes (60, 66, 68). Their tables name each code and give a status line saying whether the furnace keeps running. The modulating (-)97V and (-)98V add four codes: 65, 67, 71 and 77.

The table gives each code's displayed text and the first sentence or two of its STATUS line, verbatim, from the (-)96V manual 92-24161-124-12, Table 20, pp. 112–120. The full DESCRIPTION, EXPECTED OPERATION, CAUSE and SOLUTION columns are written for service personnel and are not reproduced. The last column shows where each code appears in the other three manuals.

Codes 65 and 67 on the modulating furnaces are non-critical, and gas heat carries on; in Rheem's words for both, "Gas heating will proceed as normal except firing rates between 50% and 65% will be fixed to 70% by the furnace control." (92-24161-126-04, p. 103.)

Each of these manuals also has a normal operation table (802V Table 12 p. 64; 96V Table 19 p. 111; 97V Table 18 p. 94; 98V Table 18 p. 91). None of these readings is a fault:

On these furnaces the lower-case letter is the low stage; for gas heat Rheem says "The lower-case "h" is displayed when the thermostat is requesting low gas heat and the upper-case "H" is displayed when the thermostat is requesting high-stage gas heat."

RGRM and RGTM LED codes

These two-stage condensing furnaces have four LEDs, labelled flame, status, power and CFM, and the manual explains each in a short legend. "There are four diagnostic LED's on the furnace control. These are labeled flame, status, power and CFM." (92-24161-84-11, p. 55). The legend below is p. 56.

The manual adds that the CFM LED "is intended to be for reference only." "Normal Fault detected." is how the manual prints the steady status light.

RGPR, RGLR and RGRK, RGRL, RGTK blink codes

These two-stage furnaces print their blink codes in a box on the troubleshooting flowchart, and the two manuals print the same box word for word: 92-24161-49-10 (RGPR / RGLR) Figure 33 on p. 41, and 92-24161-36-26 (RGRK-12ERAJS / RGRL / RGTK) Figure 53 on p. 60. The "Go to point" references are to letters on that flowchart, which is written for a trained service technician.

RGRA family blink codes

The RGRA, RGRB, RGTA, RGRS, RGTS and RGRT furnaces share one manual, 92-24161-16-20, whose Figure 54 on p. 56 is titled for "MODELS W/INTEGRATED FURNACE CONTROL (IFC) UT Electronic Controls 1012-925 (115 VAC IGNITER)". Its list stops at five blinks and marks the twinning code optional.

The same figure carries the lockout note: "NOTE: If IFC goes into lockout ("STATUS LED will blink code "1"), shut off main power to unit, wait 30 seconds and then reset power."

Same code, different meaning

These are the places where Rheem's own documents give one code or blink count different wording or a different meaning. Read your own series' table, not the nearest number.

What an owner can do, and what Rheem leaves to a servicer

Rheem's manuals are written for installers, and the maintenance chapter opens by saying so: "THESE INSTRUCTIONS ARE INTENDED AS AN AID TO QUALIFIED SERVICE PERSONNEL FOR PROPER INSTALLATION, ADJUSTMENT AND OPERATION OF THIS UNIT." What they ask the installer to tell the homeowner is short:

Unlike Goodman's manuals, Rheem's do not leave the burner-flame check to the owner: it is assigned to a qualified installer, service agency or the gas supplier. Everything a fault code's solution column describes, from pressure switches to flame sensors, is servicer work.

Rheem's gas and carbon monoxide wording

Every manual cited here prints the gas-smell instruction on its cover (p. 1), and the covers of the (-)801T, (-)801S/P, (-)92T, (-)95T, (-)96T, (-)802V, (-)96V and (-)98V manuals add a carbon monoxide warning box. The furnace pages on this site carry the general guidance above; this is Rheem's own wording.

Rheem furnaces not covered yet

Two older modulating families have a Rheem installation manual on the same document server, but their fault tables are not on this page yet: RGFE / RGGE / RGJF (92-24161-75-04) and GFD / GGD / GJD (92-24161-22-21). Their tables run to many pages, and the GFD table's text cannot be read reliably from the file, so they wait rather than risk a wrong transcription.

For Rheem's newest furnaces, the R921, R951, R962, R972 and R97M/R98M models, we did not find an installation manual on a Rheem-hosted page, so this page has no code table for them.

For other brands' schemes, see the Goodman furnace codes hub and the Carrier furnace codes hub.