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Hi Mike I think I may have gotten one wire mismatched when reconnecting wires after fan cleaning, everything started when I connected. Hot water ran longer than usual then whole system shut off but not breaker. Im wondering if I can just fix wiring and it will come back on. It is a bit hard to read the wiring diagram on my cover. Do you have any detailed pics of how the wiring colors go? Mine look exactly like your examples, its an RL04

This shouldn't be happening on a brand new install. I just installed three weeks ago and already have a code 12. Now I have a 45 min drive on top of it! UGH!!!!

Alot of blah blah blah

Hi Mike, thank you so much for the video!! I think I have just about tried everything for my code 10 and still haven't solved it. So I could use your help! I have a RL75i interior mount with side wall vent (with no other vents or obstructions anywhere nearby) and I have almost always code 10s but have an 11 and 14 in the memory. The unit runs for about 5-10 min then the shower pressure will drop as the hot water stops flowing or it will turn cold. When I am at the unit, the system either appears to start with flame then shut off and restart repeatedly or when it gets cold I see a code 10 with continuous beeping. Thus far I have removed the vent pipe and found dirt dobber nests which I have cleaned, found on on the top of the coil, a gecko and bugs inside the fan which I purchased a new one along with the thermistor which was quite dirty. I pulled the burner and cleaned it with compressed air, blew out the coil from below and back through the air intake from the fan hole. I also replaced the gas manifold, view plate, electrode and flame rods. Almost forgot, I also flushed the system and the water filter was very clean. When I started the burner flame height was low and now is full height. What am I missing here? Please help! Thank you in advance.

I just performed my annual flush of my Rannai tankless as I have done in the past. Now when I turn it on, I get a code 11. Research indicates that it is a gas issue. However, the unit has been perfect for 6 years, and I always use the same flush procedures. Is it possible that some are got into the gas line and the unit need to be bled?

Does a twin pipe direct vent on a condensing tankless need a condensate drain incorporated into the vent pipes ? Not asking about the unit, asking about the venting.

Doesn't work what to do??

So quick question what did you use to flush the tank cause you did not say nothing on that.

Hey Mike, I also wanna say thank you I remember paying like seven 800 bucks for someone to clean it out last time with two guys but this time I was able to pop off the front get those three screws off the fan check it. It was true, but there was a bunch of leaves and crap in there so Blew that up put it back blew out the exhaust pipe and we’re good as new. Thank you so much for your help. Appreciate the video. Took me about 15 to 20 minutes from start to finish.

Where can I find the flush kit system at?

Love watching your videos, they are very imformative. Im in the Central Florida area and am currently studying for my license any tips on the best course to take?

Phenomenal video. I feel extremely comfortable with taking on this project after seeing this. THANK YOU

Hi, I have a Rinnai R94LS that sounds like an air compressor running when in use. Very loud rumbling/vibrating/humming. It’s intermittent, shows no error codes, and has worked fine for six years. Removed and cleaned out the fan and did not help. What should I check next? Thanks

You do amazing videos. Question about the hot recirc line. How to (if possible) deal with the hot water recirc if using a manifold? I have a new RXP199IN being delivered this friday. Thank you in advance.

Very much appreciate your video very informative

Thanks for pointing out it is capable of being cleaned. That definitely sets it apart for my project which doesn’t use a tankless. I’m bitcoin mining with an immersion tank running a couple heat exchangers for endless hot water while earning bitcoin, and now I want to make it INSTANT as well as endless!

Dilshad

I get error code 12 on a unit 6 months old. the unit vibrates with a noise a few times then displays error code 12. Any hints if it is something besides the flame senssors?

The further most appliance is the outdoor shower which is supplied with 1/2 copper and is 15 feet from where hot line is 3/4. I was thinking of running my return to farthest point. So if it’s 1/2 does return need be 3/4. You know what that pump flow is so you know best. Thank you for advise

Love your channel. We’ve spent so much time watching/learning from you. I’m putting in same return system as you’ve covered in this video including same suggested pump and parts. Can my 60 ft return be 1/2 per or should it be like the main supply and be 3/4? Thank you

Awesome tutorial as always, Mike! Thanks for the detailed explanation of all things. Never did list the regulator number. Do you have that or do you suggest an updated version since the making of this video?

Just got mine a few hrs ago . Thanks for the info Great video!

Absolutely fantastic video! Thank you so much for all the time and effort explaining this set-up. I'm ordering my WiFi system right now for my RL75i.

Hi I’m following this process with the same tankless unit. My pump is running, service ports open, no fluid being circulated. Any troubleshooting tips?

Can you do this with a 240A model also? If so what are the settings?

I 'M WORKING FOR SERVICE COMPAGNY FOR A WILE. and I'M GLAD TO DISCOVER YOUR CHANEL. today I LEARND SOMETHING NEW . it's GOOD TO LEARN FOR BETTER CUSTOMER SERVICE

Thank you sir for the guidance. I have to replace one tomorrow 🙏🏽

Do I need to change the piping to the Navien if I'm using the Navicirc ? I have a customer I installed one for and it still takes 3.5 minutes to get water in the bathroom we put the Navicirc. I have the system set to external recirculation, the valve is set to ext, and the unit is set to always on. Any idea what's going on?

Hey Mike, I have a Rinnai i120S boiler which I installed myself (x general contractor) that is 1 year old which has been working well until recently when there was a power outage. After the power came back on the boiler displays error code 371 (Indirect Tank Thermister ). From the manual's code list, this looks line a faulty thermister. I am only using the boiler to heat the house using radiant heat panels and am not using it for DHW heating. I have not made any changes to the control panel's DIP switches (all set to default OFF positions). The boiler is still heating the panels fine but the front display just keeps flashing the error code on and off in between it's regular display. Could the power surge have damaged the thermister and is displaying the error code because of the damage, even though I do not have an indirect water tank connected? I need to test the condition of the thermister but I don't know where it is located in the boiler. If it is damaged, I would need a part number and where to purchase the replacement. And finally as a note, I now have the boiler plugged into a new UPS which will hopefully give me enough time to run down to the basement and unplug the thing before the USP battery runs out and then the power is restored. Any help would be gratefully appreciated. I love your videos so much! Keep them coming!

I see people installing pex for condensation lines on the Navien . This is a big No .

Shark bite

Hello, Great video can you tell me where to get the the lower enclosure to cover the pipes. The RX199IN is going to be installed on the outside of a brick hose. On lowes web site is picture with it installed but i can seem to find how to purchase. Got the top cap on order as well. Thanks David

Do I need teflon to prevent leaking? Mine leaks even with some teflon

Tilting the vent to drain the condensation outside is a great idea for places in a warmer climate. The manual says tilted back so that the condensate comes inside. I believe the reasoning is that you could build up a giant stalagmite of ice and clog the vent

Great presentation you was very helpful

The official Rinnai video says to remove the filter, rinse it clean, then reinstall before de-scaling; then remove, rinse clean, and reinstall again half way through descaling.

I was under the impression that by cascading the systems via the communication cable the units were able to balance hours used by way of the water adjustment valve. Last year I attended the Navien class in New Jersey and I thought we went over this. This may only be for Naviens, and I may be remembering incorrectly, but I just thought I’d ask why you would need to do FILO in that scenario.

What about piping the condensate drain outside if you live in NYC? Any concern with the water freezing at the end of the pvc that is outside, I only have a a few inches (with an elbow) outside that is already draining my house furnace humidifier.

When installing the bypass filter in the Y joint, does both O rings go on it? One at the top and the larger one at the bottom?

Question, all time the cold water will be warm ?

Good stuff. Just did back from Navien to learn about these. Installing in my home next month.

thank you so much this fixed my issue - you are a living legand and are worth your weight in gold!

I work for a gas company & your videos are SO helpful. Thank you so much!

Thank you! Very informative

I have a Rheem and when I run the pump nothing comes out of the hot water side. Is there a trick when you’re powering it down to keep the internal flow valve open?

Great action information on this tankless flush. Thanks, Mike!

Excellent in service. Thank you very much.

Perfect timing for a reminder, I plan to flush my 2 year old Rinnai RL75 heater on Monday

Greatly appreciate the info. helps make the job easy. Thx Mike!

Mike - Thank you for this video. I had a pinhole leak in the heat exchanger on a RL94iN and the plumbers quoted me $6400 for a different brand water heater fresh install. Your video gave me the courage to tackle the replacement myself saving a ton of money. Took about 4.5 hours and worked like a charm. Thank you for your knowledge!!!