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

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I have a Rinnai R53i water heater, I cleaned the fan and flue of bugs and dirt dobbers which quieted it down however the unit starts fine then suddenly there is a loud clanking noise up top, i think in or near the combustion chamber area, the flame turns off for about 30 seconds (no hot water) and then turns back on (fan runs fine) and goes thorugh the same as above. Thanks for any help. PS the unit has worked great for the past 4 years.

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Hello,

I suspect that what you are hearing is a gas buildup, which is igniting. If the funnel and associated flue pipe is solid, this is the only source of the noise that you describe.

Given the nature of my suspicions, you would be best to contact tech. support as soon as possible, and discontinue use of the water heater until it is checked out professionally.

Posted on Sep 11, 2010

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Our rinnai R94LS will shut off after running several minuets and shows error code#10. I'll turn it off for several minutes and turn back on, run system for several minuets and it will shut off again and...


Tankless computer is not working.
Error 10 is blocked flue or inadequate air supply. Or failed PC motherboard, or failed sensor etc.
Get more fresh air to unit. Check if bird built nest on flue pipe. If flue exits side of house, look for obstructions nearby that can slow the exit of poisonous vent byproduct into the air you breathe. For example trash cans and boxes or parked car etc.
http://waterheatertimer.org/pdf/Rinnai-installation-and-error-codes.pdf

Call service technician who is qualified to work on tankless computer. This will be a well-seasoned veteran of computer technology and plumbing expertise ... a plumber who knows how to fix computers lol.
This person will catch unit up on required yearly maintenance, and check specialized operation conditions needed for tankless computers to function properly.
If tankless computer is older than 5 years, then compare it to your 5-year old laptop, and assume same level of glitches and problems.

Solve any tankless problem yourself, today, for $385 by installing tank type heater from local box store:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

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Rinnai 2532 error code 10


Error Code 10 Problem: Reduced or no air supply to the water heater or there is an obstruction in extracting the flue gases out.

Solution: Make sure that the recommended Rinnai venting is used, there is no obstruction in the venting system, no reduction in diameter and lengths are per instructions. Also make sure that nothing blocks the venting system or fan, and that dip switch and condensation collar are set properly.

Good luck,

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Will air in tankless water heater for in floor heating system cause the exhaust fan to speed up and give me an insufficient cold air /exhaust error?


I know that depending on what part of the country you live in, some areas can have there utility equipment out side the home not sure of your at but the exhaust must have a certain distance from the unit. If you exhaust threw a wall you should be fine. That being said I would check the inlet to make sure that you have good water flow there should be a small filter at the inlet for the cold water. You check and clean this anyway because you water was off. Then bleed the air out of the system. There are other things to check, but start there.

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My Rinnai is set to 50 but when I run the water no hot water comes. Instead after about 10 seconds the 50 changes to a flashing 61. As soon as I turn the water flow off it reverts to 50.


This is a fault code telling you there is a problem. In this case 61 is a fault on the fan. It's not spinning at the speed expected for the electrical power it's drawing; the heater monitors this. Checks you can do are make sure the flue is not blocked. If Ok you need to get a serviceman to check the fan and heat exchanger for blockages.

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I have a problem with my Rinnai hot water heater giving me intermitant hot and cold. The water gets hot and I get in the shower. A few minutes later the hot water stops and I have to shut of the hot water...


We had the same problem - the hot water would only be hot for 3 -5 minutes and shut off, then we had to turn the water off, wait a few minutes, and do it again. VERY FRUSTRATING.

Solution: The Rinnai serviceman showed me the heat-exchanger blower/fan: It was clogged with dust and moths.

Another clue: Our Rinnai was extremely noisy when the heat came on. After the fan was cleaned and replaced, it is nearly silent.

If you are reasonably mechanically inclined:
TURN THE BREAKER / POWER OFF to the unit.

The blower-fan is located in the lower central area of the unit (at least on our unit). If you draw imaginary north-south, east-west lines through the center of the unit, the fan is in the lower-left quadrant. There is a spring clamp securing the black rubber accordian-like tube to the fan. There are two screws that secure the fan to the unit. there are two plugs that connect to the fan, as well as a third air-flow sensor that should be removed. then you can look at the fan unit, as well as the grill on the underside of the heat-exchanger that should be cleaned.

My thought was to go out and get a simple bug-screen, and place it over the air-input outlet vent going outside, but the repair guy said that although it may sound good, if that screen ever gets clogged, or reduces airflow to the Rinnai, then the unit will work harder, or even shut off, giving the same problem.

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I have a Rinnai model 2532 Tankless Water heater. When the Bath water is turned on (which is the largest water flow for the water heater)it makes a loud vibrating sound that can be heard through the entire...


We had the same problem - the hot water would only be hot for 3 -5 minutes and shut off, then we had to turn the water off, wait a few minutes, and do it again. VERY FRUSTRATING.

Soution: The Rinnai serviceman showed me the heat-exchanger blower/fan: It was clogged with dust and moths.

Another clue: Our Rinnai was extremely noisy when the heat came on. After the fan was cleaned and replaced, it is nearly silent.

If you are reasonably mechanically inclined:
TURN THE BREAKER / POWER OFF to the unit.

The blower-fan is located in the lower central area of the unit (at least on our unit). If you draw imaginary north-south, east-west lines through the center of the unit, the fan is in the lower-left quadrant. There is a spring clamp securing the black rubber accordian-like tube to the fan. There are two screws that secure the fan to the unit. there are two plugs that connect to the fan, as well as a third air-flow sensor that should be removed. then you can look at the fan unit, as well as the grill on the underside of the heat-exchanger that should be cleaned.

My thought was to go out and get a simple bug-screen, and place it over the air-input outlet vent going outside, but the repair guy said that although it may sound good, if that screen ever gets clogged, or reduces airflow to the Rinnai, then the unit will work harder, or even shut off, giving the same problem. Also - the Rinnai pipe going outside is a pipe within a pipe - so its both inlet and outlet air.

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Loud noises


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Rinnai tankless water heater code 12


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3. Verify that fuel is being supplied to the unit.

4. Check for proper electrical ground. Unit must use a grounded power supply.

5. Check for flue blockage on inlet or exhaust.

http://www.foreverhotwater.com/service-codes.php

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We had the same problem - the hot water would only be hot for 3 -5 minutes and shut off, then we had to turn the water off, wait a few minutes, and do it again. VERY FRUSTRATING.

Solution: The Rinnai serviceman showed me the heat-exchanger blower/fan: It was clogged with dust and moths.

Another clue: Our Rinnai was extremely noisy when the heat came on. After the fan was cleaned and replaced, it is nearly silent.

If you are reasonably machanically inclined:
TURN THE BREAKER / POWER OFF to the unit.

The blower-fan is located in the lower central area of the unit (at least on our unit). If you draw imaginary north-south, east-west lines through the center of the unit, the fan is in the lower-left quadrant. There is a spring clamp securing the black rubber accordian-like tube to the fan. There are two screws that secure the fan to the unit. there are two plugs that connect to the fan, as well as a third air-flow sensor that should be removed. then you can look at the fan unit, as well as the grill on the underside of the heat-exchanger that should be cleaned.

My thought was to go out and get a simple bug-screen, and place it over the air-input outlet vent going outside, but the repair guy said that although it may sound good, if that screen ever gets clogged, or reduces airflow to the Rinnai, then the unit will work harder, or even shut off, giving the same problem,

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