Question about Rinnai Digital Remote Water Heater Control Mcc-45-4us

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My r85 rinnai water heater vibrates significantly and makes

Loud noises while under heavy water demand

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  • dssmith1370 Apr 07, 2009

    My water heater vibrates under use it sounds like the house is falling down
    I have a water softener hooked up some tell me it lime or scale how do I clean it


  • happyras May 21, 2009

    One typical solution is to reduce the house water line pressure which should be reduced anyway by a pressure regulator. I set mine to 60 psi and still have an occasional issue with vibrations, resonance, however it is reduced.

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I just had this exact problem. It kept getting worse until we had no water. Our Rinnai tankless hot water heater started the same way though, with hot water for a few minutes and then would shut off with an error code 10. We just had to shut the hot water off and then back on, wait a minute or so and we had hot water back for a few minutes. Our unit would come on with a loud vibrating noise and remain until it shut off with an error code 10 (air flow fault). The solution was to remove the blower fan and blow out the squirrel cage. Ours had moths in it. We also vacuumed out the fan housing. Be careful to mark any wires you disconnect and take pictures before removal. Our unit is now almost silent when it comes on and supplies endless hot water.

Posted on Aug 11, 2016

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Sounds like there is something loose in the line.Like cut off valve,check valve.

Posted on Mar 15, 2009

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Posted on Jan 02, 2017

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1 Answer

Rinnai R85 starts to warm then stops and blinks 61??


I went to the Rinnai website and this is what I found for error code 61.
Error Code 61 Problem: Fan failure
Solution: Measure the resistance on the fan motor, check the damaged or loose wiring and connections. Make sure that the fan spins freely.
Sounds like either your fan is broken or something is keeping it from spinning freely.
Hope this helps.
Gary

Feb 24, 2015 | Rinnai R85ePLUS Tankless Water Heater

1 Answer

I have a wall mounted tankless water heater for


It's scaled
Do you have a softener? Water must be 15 GRS/PPM or less in iron and calcium. Hot spots in unit are boiling water and are causing the noises.
Descale and flush unit following Rinnai Specs and check water hardness for compliance with Rinnai standards because too hard an inlet water will VOID the Heat Exchanger Warranty (10 year).

Oct 19, 2014 | Water Heaters

1 Answer

Noise blower motor


leave unplugged... water will stay hot.
Plug in for 1 hour to make tank of hot water
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Gene

Jan 18, 2014 | Water Heaters

1 Answer

My rinnai on demand hot water heater sometimes makes rummbling noise when firing


It might need cleanning of exaust fan.or system flush of heat exchanger

Mar 05, 2013 | Rinnai Water Heaters

2 Answers

Lound vibration when running


Check gas control valve.

Good luck,

Marty

Feb 18, 2013 | Rinnai Water Heaters

1 Answer

Loud vibrating sound coming from hot water heater. Had gas company change meter and regulator. At first was losing hot water while in the shower. Went through check list after it coded out at #12, all...


Can't address other issues, but WATER pressure should be 40 to 80(I'd say 70)lbs. tester at home D for $10-15. Goes on hose Bibb outside, or at washing machine cold valve.

Mar 18, 2017 | Rinnai Water Heaters

2 Answers

I have a Rinnai model R53-i-1. When hot is called for, heater turns on and produces a low to loud vibrating noise. It seems to change with water flow use at tap. I called Rinnai, got the name of local guy,...


A low to loud vibrating noise is an indication of an Air /Fuel imbalance . When you flow more water , does the noise become louder ? if so , have a service technician check for pproper incoming gas supply . The requirements are located on the left hand side of the Rinnai unit . There will be a minimum/maximum specification.
Another issue could be the burners being "dirty" and needing to be cleaned .
Also investigate the venting and make sure all joints are sealed properly and the venting is sloped correctly . If you have your installation manual , please refer to the venting section in regards to usage of a condensate collector . This can be a cause of noise .
There is a clear vinyl hose running from the bottom of the heat exchanger to the front of the gas valve . Please inspect this hose for any moisture or signs of staining . This can lead to issues with the gas valve . It must be determined where the moisture is coming from (See previous comment about Condensate collector !) .
The cold water solenoid valve usually has nothing to do with this type of noise .
As far as yourself being able to repair the unit ? I have no idea of your experience but a qualified licensed service technician should be used as this is a gas fired appliance and as such is subject to huge liabilities when being repaired .
Have them call Rinnai Tech Support while on site for any assistance needed.
You shouldn't have to "put upo " with any noise issues . The Rinnai ujnits run at 49 decibals (about the same level as a conversation .
Good Luck !

Jan 30, 2011 | Rinnai Water Heaters

1 Answer

My Rinnai R85 heater will not heat; it is leaking water. I installed the unit 24-26 months ago, and had no problem until today. The automatic starter will engage but the flame (pilot) will not ignite. The...


I just fixed a leaky R85. Fortunately it's the bypass valve, not the heat exchanger. Did your heater freeze up in this snow storm? Unplug the power, open the cover and see where it leaks. If water comes from the top, means crack on the heat exchanger, then it would be too costly to replace. If you can see the water gushing out of a valve, on the bottom of the heater, then it's an easy fix. The valve is fixable, you don't have to replace it. But still need to find out what causes the flame fail (error 12). I suspect the igniter got wet, dry it with a towel after you take out the valve. Removing the fan first will give you more room to work inside.

Feb 09, 2010 | Rinnai Digital Remote Water Heater Control...

1 Answer

Loud noises


did you size the gas line properly? sometimes if the gas pipe isn't sized properly it will cause some pretty loud wistling noises. also if you have something in the fan like bugs or lots of dust it will cause alot of problems with noises

Jul 24, 2009 | Rinnai Digital Remote Water Heater Control...

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