It is a gas appliance and can only be worked on by a gas certified technician. It is a reignition issue and will be a faulty spark ignitor or flow sensor.
SOURCE: Not enough hot water, has to do with a shower valve
take off handle (screw under cap) there is a plastic peice behind for ajustment if you move it one way it allows more if you move the other way less contact me if you have problems thank you for useing fixya please rate me
SOURCE: tankless water heater: cold sandwich effect. While
tankless water heaters are a great appliance with one small draw back they require a constant flow of water through them to maintain production of hot water if the water presure fluctuates they can cut out momentarily or if your water supply is less than great ie hard ,high iron,
sulpher ect.. then the heat exchanger can become plugged over time like say 5 years. Contamination of the flow sensor/presure switch could also be a culprit depending on how handy you are a through cleaning with a good kettle descaler will probably help.
Good Luck
SOURCE: rinnai infinity hot water service, goes hot and cold...not fun in the shower!
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,
SOURCE: I have a problem with my Rinnai hot water heater
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.
SOURCE: I have a rinnai infinity
flow metering device is causing the heater to shut down until the temp changes enough u must adjust it on the heater refer to instillation manual or call rinnai
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