• Rheem Furnace Fault Codes
• Rheem Furnace Troubleshooting Codes
• Rheem Furnace Code 57
• Ruud Furnace Code 57
• Rheem Furnace Diagnostic Codes

Rheem AC Troubleshooting. Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical shock resulting in personal injury or death. If you're looking for help fixing your Rheem Furnace, look no further! Our comprehensive Rheem Furnace error code guide will explain common issues, provide tips,.

• POST a QUESTION or COMMENT Noritz water heaters, error codes, manuals, installation, repairs

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Noritz tankless gas water heater manuals, error codes, * company contact information.

We give contact information for Noritz water heater, geyser, cylinder, calorifier manufacturers and for water heater installation, operation, & troubleshooting manuals.

Our photo at page top shows a Noritz tankless water heater. Noritz heaters are available in models for either natural gas or propane.

We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

Noritz Tankless Water Heater Age, Manuals, Error Codes

Noritz Tankless Water Heater Standard Error Codes

Watch out: your water heater model may use different codes or may provide error codes that are not given here. Therefore you'll want to consult the manual for your specific heater.

How to use this Noritz water heater error code table

Sources: Noritz Water Heaters, Noritz North America Headquarters: 11160 Grace Avenue Fountain Valley, CA 92708 Phone: 714-433-2905

Watch out: some water heater defects represent dangerous conditions, risking fire, explosion, or carbon monoxide poisoning or scalding hazards. Work on these heaters must be by a qualifed service professional.

See the water heater manual or troubleshooting manual for your specific water heater model for expanded detail about the meaning and the corrective steps for each of these error codes.

Noritz Water Heater Manual Free Downloads

Image: the Noritz CB180 combination boiler, whole house dmoestic water heater, 18,000 to 180,000 BTUh and 0.5 to 9.1 GPM.

• Contact Noritz Water Heaters, Noritz North America Headquarters: 11160 Grace Avenue Fountain Valley, CA 92708 Phone: 714-433-2905
  Noritz Atlanta, 1220 Kennestone Circle, Suite 126 Marietta, GA 30066 Phone: 770-422-8120
  Noritz Canada: Email: sales@noritz.com
  If at any time during the installation and setup of a Noritz product you have questions or concerns, contact Noritz America Engineering & Service
  at 866-766-7489 or
  http://support.noritz.com/.
• NORTIZ NCC199(-SV, -DV), NRC111(-SV, -DV) Error Code Lists with Remote [PDF] retrieved 2018/10/14, original source: http://support.noritz.com/assets/error_code_list.pdf
  
• NORITZ NR71-SV, NR71-OD TANKLESS GAS WATER HEATER NR-series [PDF] Models : NR71-SV, NR71-OD* (For USA and Canada) and NR66-SV, NR66-OD* (For USA and Canada) and NR50-OD* (For USA only)
• NORITZ NRCP1112-DV / NRCP982-DV CONDENSING TANKLESS GAS WATER HEATER INSTALLATION MANUAL [PDF] Models NRCP1112-DV / NRCP982-DV (Eco TOUGH)
• NORITZ NRCP1112-DV / NRCP982-DV (CONDENSING GAS TANKLESS WATER HEATER MANUAL Eco TOUGH) [PDF] NG / LP
• NORITZ NRCP1112-DV / TANKLESS WATER HEATER MANUAL NRCP982-DV (Eco TOUGH) [PDF]
• NORITZ NRC98-DV NRC98-OD NRC83-DV NRC83-OD CONDENSING TANKLESS GAS WATER HEATER OWNER'S GUIDE [PDF] (2013) Models: NRC98-DV NRC98-OD NRC83-DV NRC83-OD,
• NORITZ NRC111DV CONDENSING TANKLESS GAS WATER HEATER GUIDE NRC111 series [PDF] Models : NRC111DV (GQ-C3257WX-FF US) NRC111OD (GQ-C3257WX US)
• NORITZ NRC711-OD CONDENSING TANKLESS GAS WATER HEATER MANUAL & NRC661A-OD [PDF] Outdoor Installation manual, retrieved 2018/10/14 original source: https://www.noritz.com/media-archive/NRC711_OD_installationmanual.pdf
• NORITZ NCC1991-ODCONDENSING TANKLESS GAS WATER HEATER [PDF] retrieved 2018/10/14 original source: https://support.noritz.com/download.php?file=Literature Page/Installation Manual/NCC1991O IM.pdf&field=InstallationManual
• NORITZ N-084M TANKLESS WATER HEATER MANUAL Model [PDF] (2005)
• NORITZ NRC663-FSV TANKLESS WATER HEATER MANUAL Model (EZTR40) [PDF] (2014) sold by Home Depot & other suppliers.
• NORITZ SYSTEM CONTROLLER MANUAL SC-301-6M [PDF] (2012)
• Noritz Tankless Water Heater Error Code 16 [PDF] [unsafe temperature] retrieved 2018/03/19, original source: http://www.noritz.com/wp-content/ uploads/16-Error-code.pdf
• Noritz Tankless Water Heater Seven Common Error Codes & Repairs [PDF], retrieved 2018/03/19, original source: http://www.noritz.com /blog/ how-to-resolve-the-seven-most-common-noritz-tankless-error-codes/
• Noritz Tankless Water Heater ERROR CODES & TROUBLESHOOTING GUIDE (2017), Noritz Tankless Water Heaters

Reader Comments & Q&A

On 2020-01-07 by Anonymous

Noritz water heater Error code 90

On 2019-03-28 - by (mod) -

Manuel
Either there is a leak and hot water is actually running somewhere or your water heater's control is faulty and UNSAFE.
Watch out: I would TURN OFF the system IMMEDIATELY and call for help from a licensed plumber who is familiar with Noritz water heaters.

Rheem Furnace Fault Codes

On 2019-03-21 by Manuel

Water heater runs constantly, not just when using hot water. Water seems very hot

On 2019-01-28 - by (mod) -

Earl:
Noritz water heater error codes are displayed:
On Noritz water heater models that contain a display window, the error code appears in that window.
On Noritz water heater models that do not include a display window, the error code can appear on the remote control unit such as the two Noritz water heater remote controllers shown below, the Noritz RC-7651-M and the Noritz remote control

On 2019-01-15 by earl

where are the error codes shown on noritz gas water heater?

On 2018-12-27 16:05:07.250940 - by (mod) -

thanks for the (unnecessarily impolite) comment, Anonymous.
The Noritz manuals we have at hand don't list error code 51 or we'd have included it.
Perhaps you can help us out by giving the Noritz water heater model and age for the unit whose manual lists error code 51 as 'replace manifold'.
InspectApedia.com is an independent free public website having no conflicts of interest, no connection with the sale of any product or service, and dedicated to accurate, unbiased information. Working TOGETHER makes us smarter.

On 2018-12-26 2 by Anonymous - Noritz error code 51 is a real code: Noritz needs a new mainfold

dount know what u r talking about 51 is a real coad called nortz needs manfold

On 2018-10-14 - by (mod) -

I would sure like to see a photo of the data tag on that water heater. I haven't been able to find a Noritz nv83 of any persuasion whatsoever. I'm continuing to look.

On 2018-10-13 by Anonymous

NV83-DVR

On 2018-10-13 - by (mod) - Noritz Error Code 51 - gas manifold solenoid failure

Anon
As in the table above I suspect this code might be model-specific such as the Noritz Model NRC 98-OD.

On some Noritz models error Code 51: Gas Manifold Solenoid Failure
Please take a look at the data tag on your heater, attach a sharp photo of it as an image you can add to a comment, or just tell me the model number and I will dig into this further.

On 2018-10-12 by Anonymous

What is the problem when error code is 51 blinking

...

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• WATER HEATER AGE & MANUALS - home

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Technical Reviewers & References

• Scott C. LeMarr has provided his file of keys to decode Water Heater Age from the data provided on the manufacturer's equipment labels. Mr. LeMarr is a professional home inspector, Certified Professional Inspector/President, MASTER Indoor Environmental Specialist (MIES). Vice President of Wisconsin NACHI. He and his company, Honest Home Inspections [ Website: www.HonestHomeInspections.com ], LLC. can be reached at 262-424-5587 or by email to scott@honesthomeinspections.com
• Carson Dunlop, Associates, Toronto, have provided us with (and we recommend)Carson Dunlop Weldon & Associates'Technical Reference Guide to manufacturer's model and serial number information for heating and cooling equipment ($69.00 U.S.). Technical Reference Guide, Carson Dunlop Weldon & Associates, Ltd., 120 Carlton St. Suite 407, Toronto, Ontario, M5A 4K2 Canada, ISBN 1-895585-90-2 165pp.

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Descriptions of the ICC diagnostic codes are provided below:

Rheem AC ICC Diagnostic Codes

Descriptions of the ICC diagnostic codes are provided below: NOTE: Codes must be read from correct side to avoid an error in reading codes.

Electrical Checks Flowchart

Thermostat Call For Cooling, No Cooling

Troubleshooting

Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical shock resulting in personal injury or death.

SYMPTOM: Unit will not run

POSSIBLE CAUSE:

1. Power off or loose electrical connection
2. Thermostat out of calibration – set too high
3. Defective control board
4. Blown fuses/tripped breaker
5. Transformer defective
6. High-pressure control open/Low-pressure control open
7. Miswiring of communications

REMEDY:

1. Check for correct voltage at line voltage connections in condensing unit.
2. Reset.
3. Check control board diagnostic codes.
4. Replace fuses/reset breaker.
5. Check wiring. Replace transformer.
6. Reset. Also see high head pressure remedy. The highpressure control opens at 610 PSIG.
7. Check communication wiring

SYMPTOM: Outdoor fan runs, compressor doesn’t

POSSIBLE CAUSE:

1. Run or start capacitor defective
2. Contactor defective
3. Loose connection
4. Compressor stuck, grounded or open motor winding, open internal overload.
5. Low-voltage condition

REMEDY:

1. Replace.
2. Replace.
3. Check for correct voltage at compressor. Check and tighten all connections.
4. Wait at least 3 hours for overload to reset. If still open, replace the compressor.
5. Add start kit components.

SYMPTOM: Insufficient cooling

POSSIBLE CAUSE:

1. Improperly sized unit
2. Improper indoor airflow
3. Incorrect refrigerant charge
4. Air, noncondensibles, or moisture in system
5. Bad ID TXV

REMEDY:

1. Recalculate load.
2. Check. Should be approximately 400 CFM per ton.
3. Charge per procedure attached to unit service panel.
4. Recover refrigerant. Evacuate and recharge. Add filter drier.
5. Replace TXV

SYMPTOM: Compressor short cycles

POSSIBLE CAUSE:

1. Incorrect voltage
2. Defective overload protector
3. Refrigerant undercharge

REMEDY:

1. At compressor terminals, voltage must be ± 10% of nameplate marking when unit is operating.
2. Replace. Check for correct voltage.
3. Add refrigerant.

SYMPTOM: Registers sweat

POSSIBLE CAUSE: Low indoor airflow

REMEDY: Increase speed of blower or reduce restriction. Replace air filter

SYMPTOM: High head, low vapor pressures

POSSIBLE CAUSE:

1. Restriction in liquid line, expansion device, or filter drier
2. Bad TXV

REMEDY:

1. Remove or replace defective component.
2. Replace TXV

SYMPTOM: High head, high or normal vapor pressure – Cooling mode

POSSIBLE CAUSE:

1. Dirty outdoor coil
2. Refrigerant overcharge
3. Outdoor fan not running
4. Air or noncondensibles in system

REMEDY:

1. Clean coil.
2. Correct system charge.
3. Repair or replace.
4. Recover refrigerant. Evacuate and recharge

SYMPTOM: Low head, high vapor pressures

Rheem Furnace Troubleshooting Codes

POSSIBLE CAUSE:

1. Bad TXV
2. Bad compressor

REMEDY:

1. Replace TXV.
2. Replace compressor

SYMPTOM: Low vapor, cool compressor, iced indoor coil

POSSIBLE CAUSE:

Rheem Furnace Code 57

1. Low indoor airflow
2. Operating below 65°F outdoors
3. Moisture in system
4. Closed ID circuit

REMEDY:

1. Increase speed of blower or reduce restriction. Replace air filter.
2. Add Low Ambient Kit.
3. Recover refrigerant. Evacuate and recharge. Add filter drier.
4. Repair or replace ID coil

SYMPTOM: High vapor pressure

POSSIBLE CAUSE:

1. Excessive load
2. Defective compressor

REMEDY:

1. Recheck load calculation.
2. Replace.

SYMPTOM: Fluctuating head and vapor pressures

POSSIBLE CAUSE:

1. TXV hunting
2. Air or noncondensibles in system

REMEDY:

1. Check TXV bulb clamp. Check air distribution on coil. Replace TXV.
2. Recover refrigerant. Evacuate and recharge.

SYMPTOM: Gurgle or pulsing noise at expansion device or liquid line

Ruud Furnace Code 57

POSSIBLE CAUSE: Air or noncondensibles in system

REMEDY: Recover refrigerant. Evacuate and recharge.

Service Analyzer Charts

Rheem Furnace Diagnostic Codes