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, he charged me $100.00 for adjusting (pot. valve) and told me nothing else could be done. I think it has to do with incomming cold water solenoid valve, but I'm not sure. I would like to replace it myself, what do you think?\r\nairguy
Water Heaters - Rinnai
Answers & Comments
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 !
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.