2. • Is the hot water faucet open wide enough draw at least 0.5 gallons of water per minute (GPM) through the boiler? The oily substance can be a result of exhaust circulating back into the intake due to incorrect venting installation. The Navien is a learning unit. If the power supply is normal, replace the remote controller. Remove exhaust pipe if possible to verify vent E110 blockage. Check and clean the intake air filter. Make sure there aren't any obstructions in the venting system. Exhaust blockage (Using hot water) 3. Check the heat exchanger: flush with a cleaning solution. 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). The water from the hot water faucet is cold or turns cold and stays cold. Check the vent and fresh air pipe for obstruc tions, 1. In addition to that, assess the condition of the intake air filter and clean it if necessary. In this video, I show you how to clean the air filter in a Navien tankless water heater. #E407, E421, and E432 issues For warranty service, always contact Technical Support first. 4. Abnormal activity of the gas pressure sensor. 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. Usually that just meant that air filter on the input air is clogged. Make sure the boiler is turned on. 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. If the intake vent is blocked in any way the water heater will not turn on as a safety feature. • Check the distance between intake and exhaust (at least 12" (300mm)). 3. Whether you use a traditional or a tankless water heater, you need to keep an … Check the hot water temperature setting on the front panel. Not enough fresh air, or some blockage in the air vents. To fix the Navien error code, E110 ensures nothing obstructs or blocks the exhaust pipe and that the exhaust pipe is clear. Ensure that the system water level is appropriate. Rotating noise due to debris caught in the flow sensor. If the circuit breaker operates after repairs check the wiring of each part Maintain proper direction when assembling the ignition transformer. The wire harness was dried out and falling apart. 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. 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. Problem 1: Mineral Buildup . e.g.. Question - Our Navien outdoor oil boiler (LCB700) is showing an Exhaust - 89. Check the outdoor temperature sensor wiring connection. Exhaust blockage (condensate blockage) – reset the boiler: Confirm vent length and diameter is within proper limits and clearances. 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. Tighten the ground connection screws on heat exchanger. No water comes out when the hot water tap is opened. Turn on any exhaust fans, such ar range hoods and bathroom exhausts, so they will operate at maximum speed. Whether you need an endless supply of hot water, efficient home heating or both, Navien has the most energy efficient solutions. Check the main gas line (Is the valve open?). 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 temperature is sensed higher than the actual temperature due to a defective hot water (cold water) sensor. Snow removal may be necessary to maintain clearance. Page 30 12. Page 71 3. There are problems with your heater’s fan and air pressure system. Confirm the DIP switch settings. Check the dip switches on the front panel and PCB. Check heat exchanger thermistor connection. Turn OFF the system for at least 30 minutes then restart, 3. 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. 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. 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. Check the heat exchanger; a flush may be necessary. Service call charge: $275. Exhaust gas that is recirculated into the boiler through the air inlet could produce abnormal combustion noises. The unit was installed in 2016. Abnormal operation: outdoor temperature sensor (appears only when the outdoor reset curve is enabled). Check if the wire is fixed and properly attached on the main side of the heat exchanger. 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! Once removed the unit operates normally. The circuit breaker trips immediately as soon as the power cord is plugged in the receptacle. Exhaust gas that is recirculated into the boiler through the air inlet could produce abnormal combustion noises. Turn OFF the system for at least 30 minutes then restart. I also noticed the little red cap can be pulled up or pushed down and it clicks. Service call charge: $275. Free appliance repair help, parts and troubleshooting advice for nonprofessionals. Check to see if the main gas supply valve is open. 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. The intake and outlet vent pipes run out through the poured concrete foundation and have a plastic grill on the end. 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. 4. Navien error code E110 means there is an exhaust blockage. Navien tankless water heaters & boilers for residential and commercial applications use innovative high efficiency technology to provide a comfortable environment. Is there power to the system, or is the system in stand by? Check for loose connection 2. Exhaust Overheat: exhaust limit switch shuts down the unit when the flue temperature exceeds 230*F(110*0) for more than 10 seconds. pd by check. Exhaust Overheat: exhaust limit sensor shuts down the unit when the flue temperature exceeds 230 °F for more than 10 seconds. Check the heat exchanger; a flush may be necessary. Exhaust Overheat: exhaust limit sensor shuts down the unit when the flue temperature exceeds 230 °F for more than 10 seconds. Tighten the ground connection screws on heat exchanger. Press the Power button and raise the setting temperature. Once removed the unit operates normally. The exhaust vent pipe usually has a 90 deg elbow so that it points up. 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