Check if the wire is fixed and properly attached on the main side of the heat exchanger. The water from the hot water faucet is cold or turns cold and stays cold. I thought maybe the oily residue was from the Oils in the wire harness. Problem 1: Mineral Buildup . The temperature is sensed higher than the actual temperature due to a defective hot water (cold water) sensor. 3. Abnormal exhaust thermistor open or short, Abnormal Dual Venturi Limit Switch operation, Abnormal Hot water outlet thermistor open or short, Abnormal Cold water inlet thermistor open or short, Abnormal Cold water inlet2: thermistor open or short, Abnormal water adjustment valve open or short, Abnormal circulation pump ("A" models only), Abnormal Hot water inlet2: thermistor open or short, Abnormal outdoor temperature sensor open or short (appears only when the outdoor reset curve is enabled), Totally TanklessPO Box 1134, Wappingers Falls, NY 12590. Check the heat exchanger; a flush may be necessary. The table below, which contains descriptions of faults, their causes and solutions, can help you. Turn OFF the unit, wait at least … 1. 2. Confirm the DIP switch settings. 1. Free appliance repair help, parts and troubleshooting advice for nonprofessionals. There are problems with your heater’s fan and air pressure system. • Check if there are any obstructions near the flue. When the unit is heating for DHW, the heating side does not work. For warranty service, always contact Technical Support first. Exhaust Overheat: exhaust limit sensor shuts down the unit when the flue temperature exceeds 230 °F for more than 10 seconds. Ensure that the vent termination is at least 12 in (305 mm) above Remove the Gas Orifice, ensure that the packing is properly seated inside the port, and then install the new Gas Orifice for use with LP gas. • Is the cold water inlet filter clean? Question - Our Navien outdoor oil boiler (LCB700) is showing an Exhaust - 89. If you have noticed any clear signs of a breakdown in your boiler, like lengthy water heating process, some part not working or unusual noise, take steps to repair it right away. By sharing the main intake and exhaust vent pipes, effective system venting is available with less venting materials and minimal number of … Clean out filters that belong to the heating side. Replace the thermistor, 3. The solution in the owners manual is 1: remove obstructions from exhaust pipe, 2: clean air intake filter. Turn OFF the system for at least 30 minutes then restart, 3. Turn OFF the system for at least 30 minutes then restart. Page 44: Setting The Dip Switches 6. the red cap leaks water around it and it popped up while the tankless was working. pd by check. Press the Power button and raise the setting temperature. - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or other appliance. The Navien is a learning unit. I contacted Navien And they said Thank you for contacting Navien. Rotating noise due to debris caught in the flow sensor. Circuit breaker operates while the boiler is running. Space heating supply water temperature (°F), Space heating return water temperature (°F), Outdoor air temperature (°F) (from Outdoor Temperature Sensor), System supply water temperature (°F) (with optional temperature sensor), System return water temperature (°F) (with optional temperature sensor). So if you get that error you just take off the cover and in the extreme top left of the machine you unscrew the mesh filter and clean it out and start it up again and things are fine. Check the vent and fresh air pipe for obstruc tions, 1. The wire harness was dried out and falling apart. Exhaust gas that is recirculated into the boiler through the air inlet could produce abnormal combustion noises. In addition to that, assess the condition of the intake air filter and clean it if necessary. The circuit breaker trips immediately as soon as the power cord is plugged in the receptacle. Noise due to repeated opening/closing of water adjustment valve due to a defective PCB. I also noticed the little red cap can be pulled up or pushed down and it clicks. Confirm vent length and diameter is within proper limits and clearances. Exploded View of Gas Pipe Assembly ONLY. Usually that just meant that air filter on the input air is clogged. After first checking gas pressure, I started to examine the 2" PVC exhaust flue; disconnected it from the attachment point at the top of the water heater and lifted it up enough to find a dead rat inside the top of the water heater. Check and clean the intake air filter. No water comes out when the hot water tap is opened. (ice, snow, wildlife, etc), As a temporarily solution for troubleshooting purposes,restart the unit and/or remove the front cover, It's time to a or contact Totally Tankless, Check thermistor voltage and resistance values, Set to Internal Recirculation mode and verify flow rate, Subcode 8 PCB > Ignitor: Check PCB connection and ignitor, Subcode 9 PCB > Fan: Check PCB connection and fan, Subcode 10 Abnormal monitoring device of PCB: Check PCB connection and dual venturi, Subcode 10~12 Abnormal communication between PCB and Dual Venturi: Check PCB connection and dual venturi, Check the dip switches on the front panel and PCB, Subcode 0 High limit switch of Heat exchanger: Check PCB, Subcode 1 Exhaust sensor: check exhaust sensor connection and sensor, Subcode 2 Flame rod: check flame rod connection and flame sensor, Subcode 15 Below the range of input data from Pressure sensor: check pressure sensor wiring and output voltage of pressure sensor, Subcode 16 Over the range of input data from Pressure sensor: check pressure sensor wiring and output voltage of pressure sensor, Subcode 0 From heat exchanger high limit switch: Check the PCB, Subcode 1 Exhaust sensor: Check sensor wiring connection and the exhaust sensor, Subcode 2 Flame rod: Check flame rod wiring connection and the flame rod, Subcode 3~14 Abnormal memory of PCB: Check the PCB, Subcode 15 Below the range of input data from Pressure sensor: Check the Pressure sensor wiring connection and the output voltage of pressure sensor, Subcode 16 Over the range of input data from Pressure sensor: Check the Pressure sensor wiring connection and the output voltage of pressure sensor, Ensure that the outdoor reset curve is configured properly, Check the outdoor temperature sensor wiring connection. Check and clean the intake air filter. Is the filter on the heating side restricted? Once removed the unit operates normally. • Noise due to damaged air pressure hose. Exhaust Overheat: exhaust limit sensor shuts down the unit when the flue temperature exceeds 230 °F for more than 10 seconds. Call the tech guys because your exhaust thermostat is wrong somewhere. Check the hot water temperature setting on the front panel. Whether you use a traditional or a tankless water heater, you need to keep an … 4. Check for short or water in connection, Abnormal activity of the air pressure sensor, Exhaust Overheat: exhaust high limit switch shuts down the unit when the flue temperature exceed 149°F (65°C). The intake and outlet vent pipes run out through the poured concrete foundation and have a plastic grill on the end. Find the answer to this and other HVAC questions on JustAnswer Page 71 3. Exhaust Overheat: exhaust limit switch shuts down the unit when the flue temperature exceeds 230 °F (110 °C) for more than 10 minutes. The Navien Common Vent System provides an easy way to install the vent system for up to 8 Navien NPE water heater or NHB/NFB boiler units. Check the exhaust pipe for obstructions. 2. Make sure the boiler is turned on. Check to see if the main gas supply valve is open. pd by check. Make sure there aren't any obstructions in the venting system. The unit was installed in 2016. Check the power supply to the remote controller terminal. I cleaned the air intake filter (it was already clean), but the exhaust pipe is at the roof of my house. Exhaust gas that is recirculated into the boiler through the air inlet could produce abnormal combustion noises. Check the heat exchanger; a flush may be necessary. 1. • Check the distance between flues if two or more units are installed (at least 12" (300mm)). 1. Exhaust blockage (Using hot water) 3. What I have done in the past is unplug the unit, make sure your dip switch settings are correct and the power switch inside the unit is on. i believe it is the recirculation pump air vent. Ensure that the outdoor reset curve is configured properly. Abnormal operation: outdoor temperature sensor (appears only when the outdoor reset curve is enabled). ► Replace the dual venturi. DANGER See Figure 5. • Is an error code displayed on the front panel? • Check the distance between intake and exhaust (at least 12" (300mm)). Turn OFF the unit, wait at least … Make sure the power is on, and plugged into the outlet with the correct voltage. Tighten the ground connection screws on heat exchanger. If there is a problem in power supply, check the output voltage of the PCB, and take the action separately for wiring error and defective PCB, respectively. 1. 1. Check the heat exchanger: flush with a cleaning solution. There is a 95% chance the issue is with improper vent pipe installation. Once removed the unit operates normally. Be careful that wire is not compressed when assembling the main gas valve. Check the main gas line (Is the valve open?). Navien, Inc. 20 Goodyear lrvine, CA 92618 TEL 1-800-519-8794 FAX +949-420-0430 www.navien.com Getting Service If your boiler requires service, you have several options for getting service: Contact Technical Support at 1-800-519-8794 or on the website: www.navien.com. After first checking gas pressure, I started to examine the 2" PVC exhaust flue; disconnected it from the attachment point at the top of the water heater and lifted it up enough to find a dead rat inside the top of the water heater. If the intake vent is blocked in any way the water heater will not turn on as a safety feature. #E109 and E110 issues. Ensure that the system water level is appropriate. How to Fix: Confirm that recommended Rinnai venting materials are used. /files/foerst-logo-9200.png845-790-5013$PO Box 1134, Wappingers Falls NY. #E407, E421, and E432 issues Service call charge: $275. Check tower on board for loose connection, 1. Abnormal Auto feeder valve (make-up water), Abnormal operation: water pressure sensor, Hot water outlet: thermistor open or short, Cold water inlet: thermistor open or short. Last year Navein had pulled back almost 3,400 on demand water heater (tank-less) for the second time due to CO contamination but the scenario of the first time was a bit different in 2009. Navien tankless water heaters & boilers for residential and commercial applications use innovative high efficiency technology to provide a comfortable environment. The solution is the same as for issue E012 that you should clean the air intake filter. Service call charge: $275. Abnormal activity of the gas pressure sensor. 5. e.g.. What it Means: Air supply or exhaust blockage. Check if the main gas supply valve is open, 2. Water is boiling inside the heat exchanger, 2. Whether you need an endless supply of hot water, efficient home heating or both, Navien has the most energy efficient solutions. • Ensure that the shut-off valves on the hot and cold pipes are open. • Is the hot water faucet open wide enough draw at least 0.5 gallons of water per minute (GPM) through the boiler? The circuit breaker operates at switchover to burner stage 2 after ignition. The water from the hot water faucet is not hot enough. The water from the hot water faucet is too hot. 2. Air Supply or Exhaust Blockage; Ignition Failure; Flame Failure; Keep reading to learn what signs to look for when identifying these issues and how to fix them! Check the Main and Panel PCB. To fix the Navien error code, E110 ensures nothing obstructs or blocks the exhaust pipe and that the exhaust pipe is clear. Check the heat exchanger: flush with a cleaning solution, 2. (DC 19 V or higher). Exhaust Overheat: exhaust limit sensor shuts down the unit when the flue temperature exceeds 230 °F for more than 10 seconds. Abnormal APS (open, short, initial value or no answer), Abnormal H/E outlet: thermistor open or short, Abnormal H/E inlet: thermistor open or short, Hot water outlet 1: thermistor open or short, Cold water inlet 1: thermistor open or short. Check for loose connection 2. Check the dip switches on the front panel and PCB. Install the door and wait 10 minutes for the unit to completely drain power. Wait until water supplement is terminated. The temperature of hot water at the tap is low while the temperature is high at the hot water outlet. If you take the door off and then turn it on, it will learn that environment. Exhaust Overheat: exhaust limit switch shuts down the unit when the flue temperature exceeds 230*F(110*0) for more than 10 seconds. Exhaust blockage (condensate blockage) – reset the boiler: Page 30 12. We have a Navien on demand water heater. Is there power to the system, or is the system in stand by? termination. If circuit breaker trips during the operation of the boiler, check the order of operation, and replace the concerned part. This error code can be caused by condensate blockage as well. this is not my own pic but same thing. If the power supply is normal, replace the remote controller. Not enough fresh air, or some blockage in the air vents. Remove exhaust pipe if possible to verify vent E110 blockage. Turn OFF the unit, wait at least … 88 Total Reviews Snow removal may be necessary to maintain clearance. Check the outdoor temperature sensor wiring connection. Page 1 Navien Condensing Water Heater Manual NR-180(A) NP-180(A) NR-210(A) NP-210(A) NR-240(A) NP-240(A) If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. • Check the boiler's temperature setting. 2. Navien NCB-E boilers are shipped ready to fire natural gas Figure 5. For you safety and the health of your equipment, Verify that gas pressure is within operating range, Tighten the ground terminals on the heat exchanger, Turn OFF the unit, wait at least 30 min, and then restart, Clean the inlet water filter and strainer, Check the heat exchanger and flush it if required, Check exhaust thermistor and verify [K] value in DIAGNOSTIC mode, Test Dual Venturi for proper operation using TEST mode, Verify proper voltage and wire connection, Check the intake/exhaust/condensate drain pipe for obstructions. Turn on any exhaust fans, such ar range hoods and bathroom exhausts, so they will operate at maximum speed. navien 210A NPE. Tighten the ground connection screws on heat exchanger. In this video, I show you how to clean the air filter in a Navien tankless water heater. Gas and air differential pressure error (Pop, Beep, Explosive ignition). Navien offers the industry’s most advanced condensing tankless water heaters, condensing boilers and the first combi-boilers strong enough to support whole house heating and hot water for larger homes. Check the exhaust pipe for obstructions. 5. Page 43 Non-concentric Sidewall Venting – Air is drawn from a different 2 in or 3 in Two-pipe Vertical Venting – Intake and exhaust pipes location that is at least 12 in (300 mm) away from the exhaust do not have to terminate in the same area. to accumulate, protect the vent termination from blockage. Add make-up water to the system if necessary. The exhaust vent pipe usually has a 90 deg elbow so that it points up. Is the system running for domestic hot water (DHW)? 1. Navien error code E110 means there is an exhaust blockage. 4. Check heat exchanger thermistor connection. Provide a minimum of 1 foot (30 cm) clearance from the bottom of the exhaust of the expected snow accumulation level. For the A model, the system initiates the internal/external circulation preheating when a recirculation mode is selected on the front panel DIP switches. The boiler does not work due to the defective flow sensor. If the circuit breaker operates after repairs check the wiring of each part Maintain proper direction when assembling the ignition transformer. Here is a solution for error code 'E110', found on type NPE-240A by Navien. Exhaust Overheat: exhaust limit sensor shuts down the unit when the flue temperature exceeds 230 °F for more than 10 seconds. 1. Listed below are the common Navien fault codes as described by the boiler manufacturer along with a possible cause. Check the heat exchanger; flush with a cleaning solution. Hot water does not run if the front panel is switched off. Vibration caused due to defective blower. • Check for cross plumbing between the cold and hot water lines. 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