A problem with the water heater can easily get you puzzled as it is difficult to understand whether you should call a plumber, electrician, or gas technician. To fix this issue, knowing the reasons is essential.
So, why is the iHeat tankless water heater, not heating? The iHeat electric water heater is not heating due to
- A Lack of power
- Low water pressure
- Internal component failure.
The gas iHear electric heater is not heating due to
- A Disconnected inlet or outlet pipe
- Lack of gas
- Worn out batteries.
Fixing these issues requires ensuring proper power and water supply and making sure all the pipes are connected in good condition. With my years of knowledge of this brand, I can show you the simplest ways to fix this problem.
Also, if your iHeat water heater shows other problems, you can follow the general iHeat Tankless heater troubleshooting guide. But for not heating problem, this article should be sufficient. So keep reading.
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iHeat Tankless Water Heater Not Heating
The reasons for iHeat tankless water heaters not heating can vary for gas and electric water heaters. So, before diving into the detailed discussion, let’s take a quick look at the reasons with their possible solutions.
Here are the reasons for iHeat electric tankless water heater not heating problem.
| Reason | Solution |
| Lack Of Adequate Power | Check and reset the circuit breaker, and replace or repair damaged or exposed wires. Or call an electrician if there is any confusion. |
| Low Water Pressure | Ensure the water pressure is at least 0.25 gallons per minute. |
| Incorrect Voltage Supply | Ensure correct voltage supply to the heating element |
| Malfunctioning Internal Parts | Don’t attempt to repair internal components yourself and contact an iHeat dealer. |
And, here are the reasons for the iHeat gas tankless water heater not heating problem.
| Reason | Solution |
| Disconnected Inlet/Outlet Pipe | Secure the connection of the inlet and outlet pipes to the water heater. |
| Inadequate Water Pressure | Ensure the water pressure meets the required range. |
| Inadequate Gas | Check the propane cylinder for enough gas; replace it if needed. Ensure the gas regulator is securely connected |
| Worn-Out Battery | Replace worn-out batteries |
Why iHeat Electric Tankless Water Heater Not Heating
The iHeat electric tankless water heater can stop working for several reasons. And for different electric tankless heater models of this brand, the reasons are almost similar.
Some common models that might show the problem include iHeat Electric Tankless Water Heater AHS11D, AHS14D, AHS18D, AHS16D, AHS24D, AHS21D, and AHS27D. These problems are also common for AHSD and S series of iHeat tankless water heaters.
Let’s discuss the reasons in detail.
Reason 01: Lack Of Adequate Power
Just like all the other electric water heaters, iHeat tankless water heaters also require a certain amount of electrical power to function properly.
If the heater is not receiving the required power due to issues with the electrical supply or wiring, it won’t be able to generate enough heat to warm the water effectively.
How To Fix It:
To make sure the water heater is getting adequate power, you have to check the following things.
- First, check if the water heater has a green indicator light. If you don’t see any indicator light in the water heater, that means the heater is not getting power.
- In that case, the first thing you need to check is the circuit breaker. If the breaker is tripped, reset it by turning it off and then back on.
- After that, check the wiring that connects the water heater to the electrical supply. Look for any visible signs of damage, such as frayed wires or exposed conductors. If you notice anything like that, the wiring needs to be changed.
- If you’re not comfortable working with electricity or if the above steps do not resolve the issue, call your local electrician to solve this problem.
If your water heater is getting enough power supply, go to the next reason.
Reason 2: Low Water Pressure
iHeat electric tankless water heaters require a minimum of 0.25 gallons of water inflow per minute. If the heater is getting a lower water pressure than that, the system won’t be activated and the heater will not work even though the water is flowing.
How To Fix It:
Open the cold water inlet pipe from the water heater to measure the flow rate. To perform a flow rate test, take a gallon jug and a stopwatch. Collect water from the inlet line for one minute, then measure the amount of water collected. If you’re not getting at least 0.25 gallons in one minute, you might have low water pressure.
Turn on other faucets in your home and test their water pressure. If they also have weak water flow, it’s a water supply issue and to solve this, you have to call your local plumber.
If only the water heater line has low water pressure, the valve can be the culprit. Make sure the water supply valves leading to the water heater are fully open. Sometimes, partially closed valves can restrict water flow.
Also, check the pipe that connects the inlet faucet with the water heater for debris or other obstructions. Clean the pipe by forcing water pressure from one end. If the pipe is twisted or has a leak on it, you need to replace it.
Reason 3: Incorrect Voltage Supply
If your water heater is not working at all but the light in the digital display shows up, the most possible reason can be the insufficient voltage supply. Heating elements of different models of iHeat water heater require a different voltage.
For example, the AHS series requires 240 V while the AHSH series requires 110 V.
When the elements get lower voltage than the required voltage, they cannot function properly and as a result, your water heater fails to heat the water.
How To Fix It:
Check the owner’s manual of your iHeat tankless water heater for the required voltage. And make sure that your iHeat water heater is getting the correct voltage supply.
If you find that the voltage supply does not match the heater’s requirements or if there are issues with the circuit, consult a qualified electrician. They can assess the electrical system, perform necessary repairs or adjustments, and ensure the proper voltage supply to the water heater.
You can also call your iHeat dealer for a proper solution to this problem.
Reason 4: Malfunctioning Internal Part
Tankless water heaters like iHeat have various internal components that work together to heat the water. If any of these components, including the PCB board, heat exchanger, and fan, malfunction, it can lead to the heater not heating water properly.
How To Fix It:
The iHeat manufacturer strictly recommends not trying to address these problems on your own. In these types of electric tankless water heaters, trying to repair the internal parts on your own is too dangerous for you and can cause further damage to the heater.
If despite providing adequate power and water pressure, the heater doesn’t work, you must consult with an iHeat dealer and have the internal parts repaired.
Why iHeat Gas Tankless Water Heater Not Heating
The reasons for an iHeat gas tankless water heater not working can vary from the reasons for electric water heaters. Because they function with the support of some different components.
Here are the reasons behind an iHeat gas tankless water heater not working including AGL-5 and other models.
Reason 1: Disconnected Inlet Or Outlet Pipe
iHeat gas tankless water heaters require a steady flow of water to operate. If there’s a disconnected inlet or outlet pipe, water might not be flowing through the unit. As a result, the heater is not turning on or heating water insufficiently.
How To Fix It:
Take a close look at where the inlet and outlet pipes are connected to your water heater. Check and make sure the pipes are attached properly.
Also, look for any signs of damage or leaks in the pipes. If the pipes are damaged or clogged, you have to replace them to get uninterrupted water flow.
Reason 2: Inadequate Water Pressure
Just like the iHeat electric tankless water heater, gas water heaters also require a minimum range of pressure to activate.
In the gas of gas water heaters, the required rate is 0.20 gallons per minute. If the unit is not getting this much water pressure, your water heater will not work.
How To Fix It:
Check the water pressure and if the water pressure is not up to the required range, fix it. You have to follow the same procedure mentioned earlier in this article.
Reason 3: Inadequate Gas
iHeat gas tankless water heaters need a sufficient supply of gas to generate the heat necessary to warm the water. If the propane cylinder that supplies gas in your water heater doesn’t have enough gas in it, the water heater will not work.
Also, there is a gas regulator that manages the gas flow to the gas tankless water heater. If the regulator is not tightly connected, it will not be able to supply proper gas to the unit.
How To Fix It:
Check the propane cylinder if it has enough gas in it. If not, you have to replace the cylinder.
Also, check if the LP regulator is not loose. If you found the regular to be loose, take an adjustable wrench and gently tighten it. Make sure not to tighten it too much. Otherwise, the regulator can crack.
Reason 4: Worn-Out Battery
iHeat gas tankless water heaters use batteries to power ignition and control systems. If the battery powering these components is worn out or depleted, the ignition system will fail to ignite the gas burner. As a result, the heater won’t be able to work.
How To Fix It:
Change the worn-out batteries with fresh batteries of good quality. Also, make sure the batteries are put in the right way with the plus (+) and minus (-) ends facing the right directions or polarity.
FAQs:
Why is my tankless water heater only lukewarm?
Your tankless water heater can give only lukewarm water if the water supply valve is not fully open and if there is any blockage in the outlet pipe. This problem can also occur due to a faulty heating element or burner.
Why won’t my tankless water heater fire up?
The main reason behind your tankless water heater not firing up can be a lack of gas supply to the unit. Also, make sure the gas regular r is properly tightened and the propane knob is in the “On” position.
How do I set the temperature on my Iheat tankless water heater?
iHeat tankless water heaters usually have a digital monitor from where you have to control the temperature instead of a regular thermostat. To adjust the temperature, Press the up and down arrow and check the use of the numbers on the screen.
How long does a tankless water heater take to heat?
If your tankless water heater is functioning properly and is in new condition, it should take around 15-20 minutes to heat water. With time, the duration of required heating time can increase due to worn-out components.
Conclusion:
Here are all the solutions for the iHeat tankless water heater not heating issue. I hope this article was enough to cover all the possible reasons with proper solutions. However, plumbing and electric work like this requires experience and skill to perform. So, if you are not very used to these issues, please consult professionals.
That’s all not today. Have a great day!
For more water heater repair tips, read our article on – iHeat Tankless water heater error codes.