Common FAQs About Flow-Type Water Heaters

If you make use of a tankless water heater, then you probably already know that it takes less time to get hot water with a flow-type water heater compared to an old-fashioned tank-type water heater. Typical flow-type water heaters take 10 – 20 seconds to get hot water fixtures.

Do I need to service my Rinnai gas heater?

Manufacturers generally recommend servicing the gas appliances every one or two years. For example, Rinnai, Noritz, and Navien usually recommend two years of service for your flow-type water heater. However, flow-type water heaters should be serviced by a professional at least once a year.

What is the priority button in Rinnai?

Press the “Priority button” on the temperature controller. The green Priority light will turn on and indicate that this controller is controlling the temperature and the Rinnai Tankless Water Heater is ready to supply hot water.

Can a flow-type water heater run out of hot water?

The heater heats the water whenever you need hot water instead of constantly heating water in a storage tank. Also, the temperature of the flow-type water heater never runs out of hot water while the water is flowing. So the mean resistance of tankless heaters is five to ten years longer than a storage tank model.

What is code 12 in Rinnai?

Error code 12 indicates flame failure or low gas flow in the Rinnai hot water system. Check your device if the gas is on-flow at the gas meter or cylinder. Check that there are no obstructions at the flow outlet.

Why does the cold water run?

Heater problems can occur for several reasons – they can be turned off or unplugged, or a sediment build-up can block the heating element, or the flow-type water heater may leak. Try flushing the heater and then giving it time to warm up.

What does code 11 mean on the Rinnai flow-type water heater?

This error indicates ignition failure on your device. That means your unit is not firing to heat water. It can be in a condition of insufficient gas supply, insufficient airflow, or scum at the spark plug.

error code 11 is an indication for no ignition or no gas supply in your hot water system. You can try the following steps to fix this problem: Check your hot water system for visible damage or loose parts. Test your gas source by operating a gas appliance such as a stove.

Are Rinnai flow-type water heaters advisable devices?

The owner of this device has many benefits. Rinnai flow-type water heaters are reliable, on-demand, and almost instant. They provide endless hot water energy with savings up to 40% of energy; they have high energy efficiency ranging from 82% to over 90%.

How do you know if your device is out of order?

Heating elements can also lose power due to circuit break or fuse damage, so check the fuse box.

Malfunction of the burner, for a gas-fired heater, a burner unit at the bottom of the tank contains gas that ignites to transfer the heat to the tank.

 Do all water heaters have a reset button?

The reset button is the red button located on the body (just above the thermostat). Some devices may have two reset buttons- one for each thermostat. To access the restart key, you have to remove the metal plate covering the thermostat which is in place with some screws.

What is the disadvantage of a flow-type water heater?

Flow-type water heaters produce an endless supply of hot water, take up less space, have a lower risk of leakage, are safer, and have a significantly longer lifespan. The main disadvantage of flow-types water heaters is their upfront cost (unit and installation) is higher than tank-style heaters.

How do I reset my heater?

Turn the power back on and then turn on the main gas supply. Find the set button. It sometimes has a red label. Press and hold the key. Set the key for 30 seconds. Your flow-type water heater is resetting.

What happens when a flow-type water heater fails?

If you have hot water with gas, your problem may happen by a leak in the gas line to the appliance. In this case, there is not enough hot water, nor hot water that is not hot enough; you may need to replace the heating element in your appliance because of the sediment formation.

How should I reset my thermostat?

Here are the steps you need to take to reset your AC thermostat.

• Turn Off Your AC At The Thermostat. The first step in resetting your AC thermostat is to turn it off at the AC unit.
• Find Your Circuit Breaker Box.
• Reset Circuit Breaker for your AC Unit.
• Wait 30 seconds.
• Turn AC Thermostat Back On.

When does my device need to get serviced?

Here are a few signs that your water heater is not working properly and possibly needs service.

• Poor Water Quality.
• Leaking.
• Inconsistent temperature.
• Water is hot all the time.

How do you control the pilot light on the body of the flow-type water heater?

• Open the door/cover above the pilot light access.
• Use a flashlight or a headlight to locate the burner inside.
• Turn the gas button to the “Pilot” position, and hold it.
• Fire the pilot while still holding the gas.
• Continue to hold the gas button or button for a full minute once the flame gets ignited.

As long as the thermocouple remains hot, gas flows into the device. If the pilot light is flushing, turn off the gas, there is no danger of accumulating gas.

How long does it take to reset the hot water?

Once your tank has been drained, it will need time to heal before it can deliver hot water again. A 50-gallon tank can take about 20 minutes to fill and at least 20 more minutes to heat water.

Why is my flow-type water heater getting cold?

The problem that flow-type water heaters may encounter is the cold water sandwich – the plumbing term given to sudden temperature fluctuations. The tankless water heater produces hot and cold water intermittently. The reason for this can be filtering dirty water & cold water inlets.

How do you vent the flow-type water heater?

Flow-type water heaters can go through the whole roof or sidewall creating more flexibility and placement options. Traditional gas tank water heater requires ventilation through the top. Flow-type water heaters use fans to blow the exhaust from the unit horizontally.

How to troubleshoot a flow-type water heater?

• Close the water inlet and outlet valves on the water heater.
• Flip the circuit breaker to shut off or turn off the gas to the heater.
• Locate the tab for the pressure relief valve.
• Place the submersible pump under the bucket.