John Woods tankless water heater error codes Canada
John Woods tankless water heater error codes Canada.
We do repairs and service to all John woods water heaters in Ontario Canada. Hhere is a list of nearby cities we do tankless services and repairs in the following areas.
Vaughan, Rexdale, Malton, Brampton, Mississauga, King city, Klienburg, Nobleton, Maple, Shomberg, York region, Streetsville, Meadowvale, Port Credit, Lorne Park, Clarkson, Park Royal, Erin dale, Erin mills, South Common, Oakville, Burlington, Milton, Georgetown, Acton, Caledon, OttawaHaldimand, Hagersville, waterford, Simcoe, Delhi, Port Dover, Waterford, Norwich,Nanticoke Ohsweken, Brantford, Ayr, Cambridge, Woodstock, Grimsby, Smithville, London, Delhi, Ingersol, Woodstock, Norwich, St Marys, Thorndale, Dorchester, Masonville, Liderton, Brant, burford, Liderton, Ailisa Craig, MT Brydges Delaware, Strathroy,Walford, Lampton Shores, Melbourne, Glencoe, Dutton,St Thomas, Southwold, Port Stanel, Toronto, Etobicoke, Scarborough, Markham, Thornhill,
Tankless water heaters have become increasingly popular in recent years due to their energy efficiency and convenience. However, like any appliance, they are not immune to problems and malfunctions. When tankless issues arise, troubleshooting tips can help homeowners with water heaters identify and hopefully fix the problem before calling in a licensed Tankless water heater professional.
One common issue with tankless water heaters is a lack of hot water. This can be caused by a variety of factors, including low water pressure, a clogged filter, or a malfunctioning heating element. Another issue that may arise is inconsistent water temperature, which can be caused by a faulty thermostat or water flow issues. Understanding the potential causes of these problems and how to troubleshoot them can save homeowners time and money in the long run.
In this article, we will provide a comprehensive guide to troubleshooting common tankless water heater issues. From power supply checks to water flow rate adjustments, we will cover a range of tips and tricks to help homeowners diagnose and potentially fix their tankless water heater problems. By following these troubleshooting tips, homeowners can ensure their tankless water heater is working efficiently and effectively.
Understanding Tankless Water Heater
Tankless water heaters are becoming increasingly popular, and for a good reason. Unlike traditional water heaters, they do not store hot water in a tank. Instead, they heat water on demand, providing hot water whenever it is needed. This feature makes them more energy-efficient and cost-effective in the long run.
Tankless water heaters come in two types: electric and gas. Electric tankless water heaters are smaller and easier to install, but they may not be able to provide hot water to multiple fixtures at once. Gas tankless water heaters are more powerful and can provide hot water to multiple fixtures simultaneously, but they require a gas line and exhaust venting.
One of the most significant benefits of tankless water heaters in Ontario is their longevity. They can last up to 20 years, compared to traditional water heaters that typically last 10-15 years. However, they do require maintenance to ensure they continue to function correctly.
It is essential to have a professional install a tankless water heater to ensure it is installed correctly. Improper installation can cause issues such as inadequate water pressure, water leaks, and even carbon monoxide poisoning. Regular maintenance, such as flushing the system and checking for leaks, can prevent potential problems and extend the lifespan of the unit.
Overall, understanding the basics of tankless water heaters can help homeowners make informed decisions about whether this type of unit is right for them. With proper installation and maintenance, a tankless water heater can provide energy-efficient and cost-effective hot water for years to come.
Common Issues with Tankless Water Heaters,,,
Tankless water heaters are a popular choice for homeowners due to their energy efficiency and space-saving design. However, like any appliance, they can experience issues. Here are some common issues that homeowners may encounter with tankless water heaters:
No Hot Water
One of the most common issues with tankless water heaters is not getting any hot water. This can be caused by a variety of factors, including a malfunctioning heating element, a tripped circuit breaker, or a gas supply issue. Homeowners should check the unit's power source and gas supply to ensure they are functioning properly. If the issue persists, it may be necessary to call a professional for repair.
Inconsistent Water Temperature
Another issue that homeowners may experience with tankless water heaters is inconsistent water temperature. This can be caused by a variety of factors, including a dirty water filter, a malfunctioning thermostat, or a system overload. Homeowners should check the unit's water filter and thermostat to ensure they are clean and functioning properly. If the issue persists, it may be necessary to upgrade to a larger unit or call a professional for repair.
System Overload
Tankless water heaters can experience system overload if too many appliances are using hot water at the same time. This can cause the unit to shut down or produce inconsistent water temperature. Homeowners should be mindful of how many appliances are using hot water at the same time and consider upgrading to a larger unit if necessary.
Mineral Buildup
Mineral buildup can occur in tankless water heaters over time, especially in areas with hard water. This can cause the unit to produce less hot water or shut down completely. Homeowners should regularly flush their unit with a descaling solution to remove mineral buildup and ensure proper functioning.
In conclusion, while tankless water heaters are a great investment for homeowners, they can experience issues like any other appliance. By being aware of common issues and performing regular maintenance, homeowners can ensure their tankless water heater functions properly for years to come.
Troubleshooting Steps
When experiencing issues with a tankless water heater, it can be frustrating and inconvenient. Fortunately, there are several troubleshooting steps that can be taken to identify and resolve common issues.
Resetting the System
One of the first steps to take when troubleshooting a tankless water heater is to reset the system. This can often resolve minor issues and can be done by turning off the power supply to the unit and then turning it back on after a few minutes.
Checking the Power Supply
If resetting the system does not resolve the issue, the next step is to check the power supply. For electric units, ensure that the circuit breaker has not tripped and that the unit is receiving power. For gas units, ensure that the gas supply valve is open and that the pilot light is lit.
Inspecting for Leaks
Leaks can also cause issues with a tankless water heater. Inspect the unit and surrounding pipes for any signs of leaks, such as water pooling or dampness. If a leak is found, it should be repaired immediately to prevent further damage.
Cleaning the System
Mineral buildup can also cause issues with a tankless water heater. Hard water can cause mineral buildup inside the unit, reducing its efficiency and lifespan. To clean the system, flush it with a descaling solution or vinegar. This will help remove any mineral buildup and improve the unit's performance.
By following these troubleshooting steps, many common issues with tankless water heaters can be identified and resolved. If the issue persists, it may be necessary to contact a professional for further assistance.
When to Call a Professional
While some tankless water heater issues can be easily resolved, others may require the knowledge and skills of a professional. Here are some instances when it's best to call in an expert:
Gas Leaks: If you suspect a gas leak, immediately turn off the gas supply valve and call a professional. Gas leaks can be dangerous and should only be handled by a qualified technician.
Electrical Issues: If the water heater is not receiving power or if there are any electrical issues, it's best to call an electrician or a professional with experience in handling electrical problems.
Water Leaks: If you notice any water leaks, it's important to address them promptly to prevent water damage. A professional plumber can assess the situation and make necessary repairs.
Complex Issues: If you have tried troubleshooting the issue and it still persists, it may be a complex problem that requires technical expertise. In such cases, it's best to call a professional to diagnose and fix the issue.
It's important to note that attempting to fix complex issues without the necessary knowledge and skills can lead to further damage and may even be dangerous. When in doubt, it's always best to call a professional.
Preventive Measures for Future Issues
Tankless water heaters are a great investment for any home, but they do require some maintenance to ensure optimal performance. By taking some preventive measures, homeowners can avoid potential issues with their tankless water heaters.
Regular Maintenance
Regular maintenance is key to keeping a tankless water heater functioning properly. Homeowners should schedule annual maintenance checks with a professional to ensure that the unit is working efficiently. During these checks, professionals will inspect the unit for any leaks, clean the filters, and check the system for any potential issues.
In addition to professional maintenance, homeowners should also perform some regular maintenance tasks themselves. This includes flushing the system to remove any sediment buildup and cleaning the water inlet filter. By performing these tasks regularly, homeowners can prevent potential issues from arising.
Proper Use
Proper use of a tankless water heater is also crucial to its longevity. Homeowners should ensure that the unit is not overloaded by using hot water in multiple places at once. They should also avoid setting the water temperature too high, as this can cause damage to the unit over time.
Additionally, homeowners should avoid using harsh chemicals or cleaners on the unit, as this can cause damage to the internal components. Instead, they should use mild cleaners and follow the manufacturer's instructions for cleaning.
Water Quality Control
Water quality can also affect the performance of a tankless water heater. Homeowners should ensure that the water entering the unit is clean and free of sediment or other impurities. They should also consider installing a water softener to prevent mineral buildup within the unit.
By taking these preventive measures, homeowners can avoid potential issues with their tankless water heaters and ensure that they are functioning efficiently for years to come.
Conclusion
In conclusion, troubleshooting tankless water heater issues can be a daunting task, but with the right tools and knowledge, it can be easily resolved. By following the steps outlined in this article, individuals can diagnose and fix common problems associated with tankless water heaters.
It is important to remember that regular maintenance, such as cleaning the unit and checking for mineral buildup, can prevent many of these issues from occurring in the first place. Additionally, ensuring that the unit is properly installed and vented can also prevent problems down the line.
If a problem persists despite the troubleshooting efforts, it is always best to consult a professional to avoid causing further damage or safety hazards. With these tips and precautions in mind, individuals can enjoy the benefits of a tankless water heater for years to come.
AO Smith tankless water heater error codes can indicate various issues, ranging from incorrect dipswitch settings to more serious problems like computer board faults.
Tankless error codes are typically displayed as flashing lights on the unit's status display. Referencing the unit's manual or a maintenance sheet can provide specific troubleshooting steps for each error code. Here's a breakdown of some common error codes and potential causes:
Common Error Codes:
991: This error code often indicates problems with ventilation, vent termination clearances, or gas type.
701: This usually signals a computer board fault, potentially requiring wiring checks or board replacement.
611: This error code may indicate issues with the bypass flow control or the ignition system.
03 (One Time): Incorrect dipswitch setting.
10 (Five Times): Warning for the "99" error code.
General Troubleshooting Steps:
1. Check Gas Type: Ensure the unit is using the correct gas type specified on the rating plate.
2. Ventilation Check: Inspect the intake air and exhaust for any blockages, such as snow, or ensure proper ventilation.
3. Vent Termination: Verify the distance between the intake and exhaust terminals meets the manufacturer's specifications.
4. Vent Length: Ensure the total vent length and the number of elbows are within the allowed limits.
5. Dipswitch Settings: Confirm the dipswitch settings on the PCB are correct for your location and altitude.
6. Component Cleanliness: Inspect the burner, fan motor, and heat exchanger for grease, dirt, and dust buildup.
7. Wiring Checks: Check all wiring harnesses for loose connections or breaks, especially if a computer board fault is indicated.
8. Manifold Pressure: Verify the manifold pressure is within the specified range.
9. Power Supply: Ensure the power supply is properly grounded and provides the correct voltage.
Additional Tips: Consult the unit's manual or a maintenance sheet for specific troubleshooting steps related to your error code.
If the issue persists, consider contacting a qualified technician for further assistance.
If the status light is flashing once every three seconds, it means the pilot light is lit and the gas control valve is working properly
If the error code is indicated on the 3-digit 7-Seg LED on the PCB (Part #701) of the water heater
(and/or the remote controller), refer to Section B.
<< It takes long time to get hot water at the fixtures >>
・ The time it takes to deliver hot water from the water heater to your fixtures depends on
the length of piping between the two. The longer the distance or the bigger the pipes,
the longer it will take to get hot water.
・ If you would like to receive hot water to your fixtures quicker, you may want to consider a
hot water recirculation system.
<< The water is not hot enough or turns cold and stays cold >>
・ Compare the flow and temperature. Refer to the “Output temperature chart” of the
installation manual.
・ Check cross plumbing between cold water lines and hot water lines.
・ Check if the gas supply valve fully open, the gas line sized properly and the gas supplies
pressure enough. Refer to the “Gas supply and gas pipe sizing” of the installation manual.
・ Check the set temperature, and change the dipswitch setting. Refer to Section D.
・ Refer to “Water circuit” in this section.
<
<
B. Error codes
031: Incorrect dipswitch setting
・ Check the dipswitch settings on the PCB. Refer to Section D.
101: Warning for the “991” error code
・ Check the gas type of the water heater. If it’s wrong gas type model, replace the water heater to correct one.
・ Check if there is any blockage (For example, Damper sticking, Vent Flaps installed on the
terminator, Snow build up around terminator, Installed in a closet (No ventilation or lack
of combustion air)) in the intake air and/or exhaust. Refer to the “Vent termination
clearances” of the installation manual.
・ If the water heater is installed as a direct-vent system, check whether there are enough
distance between the intake air terminal and the exhaust terminal. Refer to the “Vent
termination clearances” of the installation manual.
・ Check if the total vent length doesn’t exceed 50 ft and the # of elbows is less than 5Ea.
・ Check the altitude/elevation of area of where the water heater installed. Refer to the
“High-altitude function” of the Section D. And change the dipswitch settings.
・ Check if there is grease and/or dirt in the burner (Part #101), and the fan motor (Part
#114), especially if the water heater has been installed in a contaminated area.
・ Check if there is dust and lint in heat exchanger.
・ Check the manifold pressure of the water heater. Refer to installation manual.
111: Ignition failure
1. Check gas supply and inlet gas pressure.
2. Check if the Hi-limit switch (Part #432) is properly functioning.
3. Check for connection/breakage of wires (Part #110, 404, 704, 705, 710, 719), burn marks
on the computer board (Part #701), and/or soot on the flame rod (Part #106). And then if
O.H.C.F (Part #008 and/or #404) is breakage, Consult the manufacturer.
4. Check if there is a buzzing spark ignition sound coming from the burner (Part #101) when
water heater prepares for combustion.
5. Listen for the double “clunk” sound coming from the gas valves assembly (Part #118)
when water heater goes into combustion.
6. (Only no sparking and/or kick sound) Check voltage on each wire to gas valves assembly
(Part #118) and/or the igniter (Part #123). Refer to the “Appendix A” in Section C.
*No sparking sound >>>>> Refer to the #1 at “Appendix A” in Section C.
*No kick sound >>>>> Refer to the #2 at “Appendix A” in Section C.
7. Check if there is leaking from heat exchanger (Part #401 or 456)
8. Check if there is dust and lint in nozzles of the manifold (Part #118).
9. Check current on the flame rod (Part #106). Refer to the #3 at “Appendix A” in Section C.
121: Loss of flame
1. Check gas supply and inlet gas pressure.
2. Check if the Hi-limit switch (Part #432) is properly functioning.
3. Check for connection/breakage of wires (Part #110, 404, 704, 705, 710, 719), burn marks
on the computer board (Part #701), and/or soot on the flame rod (Part #106). And then
if O.H.C.F (Part #008 and/or #404) is breakage, Consult the manufacturer.
4. Check if there is leakage from heat exchanger (Part #401 or 456).
5. Check if there is dust and lint in nozzles of the manifold (Part #118).
6. Check current on the flame rod (Part #106). Refer to the #3 at “Appendix A” in Section C.
311,321,331,341*: Disconnected/short-circuited thermistor
・ Check for connection/breakage of wires and/or debris on thermistor (Part #422, 433, 418, 706, 707,721).
・ Check thermistor resistance. Refer to the “Appendix D” in Section C.
391: Air-fuel Ratio Rod failure
・ Check for connection/breakage of wires (Part #710) and/or soot on the AFR rod. (Part #106)
441: Flow Sensor failure (Only Easy-Link system)
・ Check for connection/breakage of wires and/or debris on impeller (Part #429, 708).
510,551: Abnormal Main and Gas Solenoid Valve
・ Check for connection/breakage of wires (Part #705) and/or burn marks on the computer
board (Part #701).
・ Reset power supply of the water heater.
・ Check voltage on the each valve on the gas valves assembly (Part #118). Refer to the
“Appendix C” in Section C.
611,621*: Fan motor and Exhaust Fan motor fault
・ Check for connection/breakage of wires, dust buildup in the fan motor/Exhaust fan motor
(Part #114,124) and/or burn marks on the computer board (Part #701).
・ Check for frozen/corrosion of connectors of the fan motor (Part #114,124).
・ Check voltage between blue wire and each wire of the fan motor (Part #114,124) during
operation. Refer to the “Appendix B” in Section C.
631: Abnormal External Pump
・ Check whether the pump connected to PCB (Part #701) works properly.
651,661: Water control valve fault (Only Easy-Link system)
・ Check the water control valve (Part #423), connection/breakage of wires (Part #423),
motor drive locked due to scale buildup, and/or water leakage.
・ Check voltage between black wire and red wire. Refer to the “Appendix F” in Section C.
701: Computer board fault
・ Check for connection/breakage of wires (Part #708) and/or burn marks on the computer
board (Part #701).
711: Hi-limit switch trip/ Gas solenoid valve drive circuit failure
・ Check connection/breakage of wires (Part #705) and/or burn marks on the computer
board (Part #701).
721: False flame detection
1. Clean the flame rod (Part #106).
2. For indoor models, check if condensate drain is installed on the vent collar of the water
heater.
3. Check if there is leaking from heat exchanger (Part #401 or 456).
741: Miscommunication between water heater and remote controller
1. Check the model type of the remote controller. Model name 9007603005 is the correct one.
2. Inspect for the connections between the water heater and remote controller. Refer to
“Remote controller connections” section in the Installation manual.
3. Check the power supply of the water heater.
4. If this error code appears only the 3-digit 7-Seg LED on the PCB (Part #701), check the voltage
on the remote controller terminal on the PCB. Refer to the “Appendix E” in Section C.
5. If this error code appears only remote controller, replace the PCB (Part #701).
6. If this error code appears both the PCB (Part #701) and the remote controller, replace the
remote controller.
761: Miscommunication between Parent unit and Child units for Easy-link system
・ Check if connection between the parent unit and the child units are correct. Refer to
“Easy-Link system” section in the Installation manual.
941*: Abnormal exhaust temperature (Only 520 Direct Vent Indoor)
・ Check if the set temperature is higher than 140°F (60°C) and the system is Recirculation.
・ Check exhaust thermistor resistance. Refer to the “Appendix D” in Section C.
991: Imperfect combustion
・ Refer to the “101” error code in this section.
Appendix A (For error code 111)
Check these points during ignition stage.
# 1. Refer check point “B2” on the wiring diagram above.
Check voltage between purple wires.
(Normal: AC 90 to 110 V)
This Check point is normal?
Yes >> Replace the igniter (Part #123)
No >> Go to Next
# 2. Refer check point “C” and “H1” on the wiring diagram above.
Check the voltage bellows.
C: Between blue wire and light blue wire (#3).
(Normal: DC78 to 100 V)
C: Between blue wire and orange wire (#53).
(Normal: DC78 to 100 V)
H1: Check the voltage between white wire and red wire.
(Normal: DC 1 to 15 V)
These check points are normal?
Yes >> Replace the gas valves assembly. (Part #118)
No >> Replace the PCB. (Part #701)
# 3. Check current thought the orange flame rod wire (Part #710).
(Normal: more than 1μA)
This check point is normal during operation?
Yes >> Replace the PCB. (Part #701)
No >> Replace the flame rod. (Part #106)
Appendix B (For error code 611 & 621)
Refer check point “G1” & “G2” in the diagram to the left and followings.
・ Check voltage between red wire and blue wire.
(Normal: DC 110 to 160 V)
・ Check voltage between yellow wire and blue wire.
(Normal: DC 13 to 17 V)
・ Check voltage between orange wire and blue wire
(Normal: DC 2.0 to 6.5 V)
All check points are normal?
Yes >> Replace the fan motor and Exhaust fan motor. (Part #114&124)
No >> Replace the PCB. (Part #701)
Appendix C (For error code: 510 & 551)
Refer check point “C” in the diagram to the left and followings.
Check voltage on the each valve on the gas valves assembly.
・ Between blue wire and light blue wire (#3). (Normal: DC 78 to 100 V)
・ Between blue wire and green wire. (#9) (Normal): DC 78 to 100 V)
・ Between blue wire and orange wire (#53). (Normal: DC 78 to 100 V)
・ Between blue wire and red wire (#73). (Normal: DC 78 to 100 V)
All check points are normal?
Yes >> Replace the gas valves assembly. (Part #118)
No >> Replace the PCB. (Part #701)
ppendix D (For error code: 311, 321, 331, 341 and 941)
・ Mixing thermistor (Find the marking of No.113 on the connector)
Check point “E1”
・ Output thermistor (Find the marking of No.12 on the connector)
Check point “E2”
・ Inlet thermistor (Find the marking of No.42 on the connector)
Check point “E3”
Check resistance between black wire and black wire.
°F 50 59 68 77 86 95 Temperature °C 10 15 20 25 30 35
Resistance kΩ 15.4 12.6 10.3 8.5 7.0 5.9
・ Exhaust thermistor (Find the marking of No.52 on the connector)
Check point “K1”
Check resistance between white wire and white wire.
°F 50 59 68 77 86 95 Temperature °C 10 15 20 25 30 35
Resistance kΩ 19.5 15.9 13.0 10.7 8.9 7.4
All check points are normal?
Yes >> Replace the PCB. (Part #701)
No >> Replace the wrong thermistor. (Part #422, 433, 418, 706)
Appendix E (For error code 741)
Refer check point “F” on the wiring diagram above.
Check voltage on the remote controller terminal on the PCB. (Normal: DC 11 to 25 V)
This check point is normal?
Yes >> Replace the remote controller.
No >> Replace the PCB. (Part #701)
Appendix C (For error code: 510 & 551)
Refer check point “C” in the diagram to the left and followings.
Check voltage on the each valve on the gas valves assembly.
・ Between blue wire and light blue wire (#3). (Normal: DC 78 to 100 V)
・ Between blue wire and green wire. (#9) (Normal): DC 78 to 100 V)
・ Between blue wire and orange wire (#53). (Normal: DC 78 to 100 V)
・ Between blue wire and red wire (#73). (Normal: DC 78 to 100 V)
All check points are normal?
Yes >> Replace the gas valves assembly. (Part #118)
No >> Replace the PCB. (Part #701)
Appendix F (For error code 651 & 661)
Refer check point “J” on the wiring diagram above.
Check voltage between blue wire and brown wire. (Normal: DC 13 to 16 V)
This check point is normal?
Yes >> Replace the Water control valve. (Part #423)
No >> Replace the PCB. (Part #701)
D. Dipswitch Settings on the computer board of the water heater
Change the dipswitch settings when the power supply is turning off.
The dark square is the direction the dipswitch should be set to.
DEFAULT is the factory setting.
FM speed is increased automatically.
The Gas Type and Model Type dipswitch should
already be properly preset from the factory.