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WCohn, Journeyman Plumber
Category: Plumbing
Satisfied Customers: 1135
Experience:  Journeyman Plumber/Estimator
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My rinnai heater makes a somewhat loud noise and maybe

Customer Question

my rinnai heater makes a somewhat loud noise and maybe vibration ,it doesn't do this all the time but seems to cycle through this noise as a tub is being filled also once in a while the water goes cold while filling tub
JA: How long has this been going on? And how severe is the problem?
Customer: the unit is maybe ten years old and the inlet filter screen had very little residue/ build up also i did flush the unit after two years of operation but haunt since… the noise just for a couple weeks and is not severe but worrisome
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: no.. was thinking about opening the unit and checking things
Submitted: 5 months ago.
Category: Plumbing
Expert:  WCohn replied 5 months ago.

My name is ***** ***** I look forward to helping you!

Expert:  WCohn replied 5 months ago.

I am a Rinnai factory trained and certified repair technician

Have you gotten any two digit error codes

Customer: replied 5 months ago.
Expert:  WCohn replied 5 months ago.

Typically the noise you are describing is associated with an air to fuel mixture. Need to check the intake and exhaust as well as gas pressure

Customer: replied 5 months ago.
as far as the vent goes it appears clear .as far as the intake are you referring to the intake for the fuel burn?
Expert:  WCohn replied 5 months ago.

The vent is made up of two pipes. One inside another. The exhaust is the inne one and the intake air is the outer one