Water Heater Services

Never Run Out Of Hot Water

Switch to a tankless water heater, you’ll never have to choose between taking a piping hot shower, doing a load of laundry, or running the dishwasher. Hot water is always available.

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Better Than A Tank

Tankless water heaters last up to twice as long, have twice the warranty, and save energy as they only heat water when it is needed. Consumer financing and rebates are also often available. Follow this link to find units eligible for a rebate.

Save Valuable Space

Small and mighty, the suitcase-sized wall units fit in tight, discreet spaces, freeing up more usable living area in your home. No more storing large quantities of water that could potentially leak on your floor. Also, parts are usually replaceable, rather than replacing the entire unit.

Tankless Water Heater Installation

We fix and repair tankless water heaters no matter what you’ve been told by other plumbers. Most tankless water heaters are designed to be repaired easily and in less than 30 minutes.  Contact us (714) 425-1667 and we will do our best to make sure you never run out of hot water.

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Tankless Water Heater Error Codes

With a terrific selection of quality water heaters in Santa Ana, CA, our locally owned and operated company offers great service to both commercial and residential customers in south coast metropolitan Orange County.

Rinnai Error Codes
Error Code 02: No burner operation during freeze protection mode.

Call Now (714) 425-1667

Error Code 03: Power interruption during bath fill

Turn off all hot water faucets/taps. Press On/Off button twice. Turn hot water back on and test. You may have to try this a couple times to reset the system.

Error Code 10: Exhaust or air supply blocked

There are several things you can do before calling a plumber. Try the following:

Check venting material. Is it Rinnai-approved? (See Rinnia-approved venting materials here.) If not, replace venting material or have a plumber replace it. Call (714) 425-1667
Look for blockages in both the flue inlet or exhaust.
Are the venting components properly connected?
Check the condensation collar. Is it loose or improperly installed?
Are the dip switches set correctly?
Is the fan rotating properly, or is something blocking it?
If the error code still shows, call (714) 425-1667

Error Code 11: Ignition problems

Because this has to do with gas and gas lines, most people will need to call a plumber to handle this. However, these are steps the plumber will take (and you could carefully try some of these yourself):

Is the gas on? Check at the water heater, gas meter or cylinder.
Is the gas type and pressure correct?
Is the gas line, meter and/or regulator sized properly?
Is the air in the gas line? Have a plumber bleed the air from the lines.
Are the dip switches set?
Is the appliance grounded?
Disconnect EZConnect™ or MSA controls to see if you can isolate the problem.
Does the igniter work? Is it operational or do you need to replace the igniter? Check the wiring harness and see if it’s the igniter or the harness.
Examine the gas solenoid valves. Any open or short circuits?
Remove the burner cover and examine the burners to see if they are one, properly sealed, and two, if the burner surface has condensation or debris on it.
If you are not familiar with these parts and with both wiring and gas, you should hire a plumber to deal with a Rinnai error code 11.

Error Code 12: Flame failure

Because this has to do with gas and gas lines, most people will need to call a plumber to handle this. However, you could carefully try some of the steps a plumber will take. Use the checklist for Rinnai error code 11 (above), and if those steps don’t fix the problem, try the following:

Check power supply. Any loose connections?
What is the voltage? Any voltage drops?
Is the flame rod wire connected? Any problems with carbon build up on the flame rod?
Check for DC shorts at components.
If you are not familiar with these parts and with both wiring and gas, you should hire a plumber to deal with a Rinnai error code 12.

Error Code 14: Thermal fuse

Something is wrong with the thermal fuse. You may be able to fix it by trying the following:

Check for air flow restrictions.
Is water flow in the circulating system low? This can cause problems related to short-cycling.
Check dip switches.
Anything gunking up the combustion chamber? What about the exhaust pipe? Obstructions can cause problems with thermal fuse function.
How does the heat exchanger look? Any cracking or separations? Hot spots? Hot spots indicate scale build up.
Flush the heat exchanger following the instructions on the owner’s manual.
Check the resistance of the safety circuit.
Error Code 16: Over temperature warming

This problem usually is caused by a restriction of airflow. Check for clogs or obstructions in the following:

Combustion chamber
Exhaust piping
Heat exchanger
You will also want to check for restrictions in air flow around unit and vent terminal and for low water flow in a circulating system causing short-cycling. Once you clear the obstructions and improve airflow and water flow, the problem should resolve itself. If it does not, call Call (714) 425-1667

Error Code 32: Outgoing Water Temperature Sensor Fault

This one is simple: carefully examine the sensor. Look for damage and scale build up. You probably have to replace the sensor if cleaning it doesn’t help.

Error Code 33: Heat Exchanger Outgoing Temperature Sensor Fault

Similar to above. Carefully examine the sensor. Look for damage and scale build up and make sure the fan blade is tight on motor shaft and is undamaged. You probably have to replace the sensor if cleaning it doesn’t help.

Error Code 34: Combustion Air Temperature Sensor Fault

Same as above. Carefully examine the sensor and wiring. Look for damage and scale build up. You probably have to replace the sensor if cleaning it doesn’t help.

Error Code 52: Modulating Solenoid Valve Signal Abnormal

You probably need to replace the solenoid valve.

First: Check modulating gas solenoid valve wiring harness for loose or damaged terminals.
Measure resistance of valve coil.
You may be able to resolve the problem by tightening loose terminals.

Error Code 61: Combustion Fan Failure

Examine the combustion fan to see:

Can the fan turn freely?
Any problems with the wiring harness? Maybe it has been damaged or has loose connections?
Is there a problem with the motor winding resistance?
Error Code 65: Water Flow Control Fault

You definitely need to call a plumber for this one. The water flow control valve has failed to close during the bath fill function. Immediately turn off the water and discontinue the bath fill function. Then call Acute Plumbing (714) 425-1667

Error Code 71: Solenoid Valve Circuit Fault

You probably need to replace the solenoid valve. First:

Check wiring harness to all solenoids.
Measure resistance of each solenoid valve coil.
Error Code 72: Flame Sensing Device Fault

You can try the following:

Check to see if the flame rod is touching flame when the unit fires.
Examine the wiring to flame rod for damage.
Clean the flame rod with sandpaper.
Examine inside the burner chamber for debris or gunk that might be blocking the flame at the flame rod.
Replace flame rod.
Error Code 00 or “LC”: Scale build up in heat exchanger.

Call (714) 425-1667 to have us flush the heat exchanger or replace the heat exchanger.

Note: A lot of customers ignore this code because it still allows the tankless water heater to continue running. You will see the display alternates between the LC code and the temperature setting. Make sure you get the heat exchanger serviced and don’t ignore this code just because it allows you to still run the unit or you may have more serious problems down the line.

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Tankless Water Heater Repair

The Rinnai PRO Network
Because professional installation is highly recommended, Rinnai has an extensive network of trained and experienced professional installers to provide you with superior product performance. As a Rinnai PRO we will help you choose the right model for your needs, provide you with financing options, and perform a top-quality installation.

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Acute Plumbing is Your Local Rinnai Tankless Water Heater Sales & Service Experts.