Suspect is a bad bearing iN the fan. Navien tankless water heaters & boilers for residential and commercial applications use innovative high efficiency technology to provide a comfortable environment. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. Starts unexpectedly and ends the same way. However, It is the whistling high pitch noise that I cannot bear with when using the laptop at home or private room. Here are the sounds that have been tagged with Whistle free from SoundBible.com Please bookmark us Ctrl+D and come back soon for updates! Ask the community. View and Download Navien NCB-180 service manual online. 05-19-2018 Every time you turn it on, you can hear the water running till the end. Whether you need an endless supply of hot water, efficient home heating or both, Navien has the most energy efficient solutions. Post navigation The most common cause of a burner whistling noise is improper gas pressure. Trying to spell the noise that a whistle makes can be quite a task/practically impossible! We install Navien water heaters but also Bradford White, Rheem and many more brand. For information, my unit is AE519TU model. I have brought your issue to the attention of an appropriate team within HP. Once it is safe to work on it — and you have given it time to cool — you should examine all the connections and ensure they are tight. - edited This lasts for 5 minutes or so or until I turn boiler off and then on again. It is repeatedly breaking down and the cost is out of our pocket. 05-19-2018 My guess is maybe an air leak but I'm not too sure. 06:20 AM. If its flame related the noise will stop. Thank you for the response @rick-s, untill I write this reply no private message received at my end. Please look for a private message from an identified HP contact. I returned the first two that I purchased thinking that they were defects. Participate in over 40 different forums and search/browse from nearly 3 million posts. Powerflush done this week and heating much improved. I have heard of this before but was resolved through combustion adjustment. Drain Valve Also for: Ncb-210, Ncb-240. The only hint is that if I roll down the front passenger window, the whistle becomes louder. If the noise occurs when the burners are firing it would be a good idea to have a pro check out the gas pressure. Didn't find what you were looking for? If this bothers you and your family members, you can contact a local plumber and fix any possible damage or element causing the loud noise. TheTechZoneI have had some questions regarding the fans and the noise produced by my HP Spectre X360 from late 2017 with the new i7-8550U CPU. Is this normal from the spectre x360 which is a flagship high end HP notebook or please advise if it is a defect product ? Ask Our Pros-Owner Assistance - NO DIY advice will be given. Post photos, respond to polls and access other special features. Compared to other brands, the tankless water heaters of Navien operate a bit louder. They will likely request information from you in order to look up your case details or product serial number. When I disconnect the power supply to the HD the noise stops but swapping out the HD did not solve the problem - the high pitch noise is back even with a new drive. Continous whistling noise is improper gas pressure Ctrl+D and come back soon for!! It the loudest when i just barely tap my gas pedal and as well as when hit! With tech support tonight and we decided to check dell community for reporting. Furnace, however, it is repeatedly breaking down and the guy is skipping out Professional section... Advice will be given turned on, there is an almighty loud whistling sound from Navien Boiler! Dated on 22-Feb-2018 the valid reference state it is otherwise a chalkboard installed this unit exactly according to 2. 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