Water Heaters - Popular Questions, Answers, Tips & Manuals


Water Heaters | 35 views | 0 helpful votes

Some time ago I had that happen and because of the age my repair man said it would cost too much to repair it. The problem was a worn out thermostat.

Honeywell Water... | 60 views | 1 helpful votes

No, take it from outside as it is supposed to be as advised by the manufacturer. You have to follow the manufacturers advice and building code. If anything happened even to a new owner you would be liable and if a building inspector on a sale survey notices, you will not be able to sell unless fixed. Better to do it right at installation. Hire a core drill.

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Water Water... | 41 views | 1 helpful votes


Water Heaters | 41 views | 0 helpful votes

Try cleaning flame sensor if ok bad control board or dirty burner

Water Heaters | 32 views | 0 helpful votes

Code 12 is a flame failure.
First step in diagnosing the root of the issue is to check for any separation, obstruction, or failure in the vent system.
Second step is to use the isolator kit under the heater to flush the heat exchanger with vinegar or rectorseal calci-free.
These two things are a great starting point to working on any tankless water heater. Flame failure can be as simple as the heat exchanger being clogged not allowing the sensors to work properly or the exhaust being mixed with the air intake. If the problem persists I would suggest having a Rinnai Certified Tech look at the heater.

Rinnai Water... | 39 views | 0 helpful votes

Code 11 is ignition failure.
Ensure that your gas is turned on.
Start by checking the vent system to ensure there is no obstruction or separation in the vent system.
Second I would recommend flushing the water heater with vinegar or Rectorseal Calci-Free. Calcium and scale build up in tankless water heaters can cause several failures that are not directly related to the specific code displayed on the heater.
If the problem persist I would look for a plumber that is familiar with tankless water heaters.

Noritz Water... | 40 views | 0 helpful votes

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