How do I fix error code 79 on Rinnai?

Error Code 79

1. Inspect the wiring harness on the leak detector.
2. Inspect the heat exchanger and all the internal piping within the tankless.
3. If you don’t find any leakage, look inside the cabinet.
4. If you find evidence of water pooling, dry off the leak sensor as well as the inside of the cabinet.

How do I reset my Rheem water heater?

Turn the water heater’s gas valve switch to the “OFF” position, wait for a few seconds and then flip the switch to the “ON” position to reset the system.

Where is Rheem error code?

The error code is displayed on the LED display panel on the front of your continuous flow water heater.

Why does my Rheem tankless water heater keep shutting off?

One of the most common reasons that your tankless hot water stops working in the shower is because your current unit can’t supply enough hot water per minute. If you’re attempting to do the laundry, run the dishwasher, and shower at the same time, then you’re likely straining your on-demand water system’s capabilities.

Why is my tankless hot water heater beeping?

Your tankless water heater will “beep” and display an error code to alert you to a problem with the system. Tankless water heaters will alert you with an audible alarm when service is required, a component fails, or a gas or water leak is present.

Why does my tankless water heater go cold?

Another problem that tankless water heaters can run into is that of a cold water sandwich—a plumbing term given to sudden temperature fluctuations, when your tankless water heater produces hot and cold water intermittently. This can be caused by: An improperly sized gas line, as mentioned above.

Where is the reset button on a Rheem electric water heater?

Then, push the water heater reset button(s). Somewhere on your electric water heater, you’ll find a reset button. It’s usually red and often located near the thermostat. It may also be hidden behind a removable metal panel on the unit—and then behind some insulation. Once you find the button, push and release it.

Where is the reset button on a Rheem furnace?

Rheem/Ruud are one of the few manufacturers that have a reset button on the outside near the bottom of there outdoor heat pumps and air conditioners. It’s available to anyone who wants to push it, but be aware, there is a reason that this reset has stopped your AC from working.

Why is my Rheem water heater beeping?

A water heater may sound a beep to warn that there is a water leak. Leaks may be obvious if the floor is wet near the water heater, but the leak might also be somewhere along the line. The beeping may be initiated by a water heater shutoff feature, a flood prevention device. Beeping may also signal a gas leak.

Why is my tankless water heater not staying hot?

Because tankless units only heat water as it’s needed, running too many hot water appliances at the same time could mean the unit just can’t keep up. On the other hand, your “no hot water” problem could be cause by a bigger issue such as: Plugged heat exchanger (due to hard water) A blocked vent/air intake.

Why do I have to keep resetting my tankless water heater?

When your thermostat stops working correctly, it can fail to regulate the temperature in your electric water heater properly. This, in turn, will cause your water to heat up to dangerous levels, which will cause the reset switch to trip.