How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask WTRHTRPRO Your Own Question
WTRHTRPRO
WTRHTRPRO, Water Heater Expert
Category: Plumbing
Satisfied Customers: 116
Experience:  15 yrs in the water heating and plumbing industry.
61943388
Type Your Plumbing Question Here...
WTRHTRPRO is online now
A new question is answered every 9 seconds

I am getting error 11 on my r75s rinnai tankless water heater.

Customer Question

I am getting error 11 on my r75s rinnai tankless water heater. no ignition, but think i hear the clicking of a solenoid valve
Submitted: 5 years ago.
Category: Plumbing
Expert:  WTRHTRPRO replied 5 years ago.

WTRHTRPRO :

Hello, Error code 11 on this unit is failure to detect ignition.

WTRHTRPRO :

How long has this unit been installed? What is the fuel type?

Customer:

natural gas

WTRHTRPRO :

Do you know if this unit has it's own regulator feeding it?

Customer:

installed about 2 years. if it would be located outside of unit then no

WTRHTRPRO :

it has been working fine up until recent?

Customer:

no 4 weeks ago error code 12 was coming up. called installer. after aweek he replaced and or cleaned burner plate. found bits of leaves inside

WTRHTRPRO :

OK.

WTRHTRPRO :

So the installer cleaned the burner, and now your getting this code 11 in the last few days?

Customer:

this morning no hot water

WTRHTRPRO :

ok, lets try to reset it, and see if it will run. Turn off the power on the display, then unplug the power from the unit. Wait about 30 seconds, then plug it back in. Give it a few seconds to boot up, and turn the power on and see if it tries to light.

Customer:

k

WTRHTRPRO :

I will be waiting while you do this, I would just turn on a couple of lavs or a laundry sink for the hot water draw test.

Customer:

nothing

WTRHTRPRO :

OK, did you get an error code 11? or do nothing at all?

Customer:

11

WTRHTRPRO :

ok... then the next steps are a bit technically involved.

WTRHTRPRO :

The next step would be to check the gas pressure going to the unit, verifying the ignitors are clean and properly aligned.

Customer:

ok

WTRHTRPRO :

I would recommend that you contact the installer or Rinnai directly to have a certified service agent check your unit out.

WTRHTRPRO :

There is not too much else I can do without standing in front of the heater at this point.

Customer:

thank you

WTRHTRPRO and 2 other Plumbing Specialists are ready to help you