How to diagnose and repair a faulty atmospherically vented gas fired water heater.
Tankless hot water heater ignition problems.
He pilot light can go out or fail to ignite and the sensors can simply quit working without any explanation.
The failure can be caused by a problem inside the water heater or due to an external cause.
You see every tankless water heater has a minimum flow rate which is the minimum amount of water measured in gallons that the tankless unit needs flowing through it every minute gpm to produce hot water.
Example tank is a john wood 40 gallo.
Water is not hot enough.
Be sure to take note of the warning message and time for a more accurate report.
The air supply and specialized exhausts have a tendency to get blocked which usually makes the device shut down.
With so many wires and small parts tankless hot water heaters can have a long list of possible problems.
Since tankless water heaters need a minimum amount of water flow before activating there s a gap between completely cold water and the coolest warm water that you can create with a hot and cold water mix.
If you have an older tankless water heater 10 years old the problem is most likely that the minimum flow rate is too high.
Last year navein had pulled back almost 3 400 on demand water heater tank less for the second time due to co contamination but the scenario of the first time was a bit different in 2009.
The burner is too noisy.
Mineral buildup system overload cold water sandwich air supply or exhaust blockage ignition failure flame failure.
Which is required will depend on what can provide a sufficient level of fuel to the water heater.
Burner does not ignite.
Warning messages and or error code on the unit.
Here are six of the most common problems and maintenance concerns for tankless water heaters.
Most tankless water heaters operate off a 1 2 inch or 3 4 inch gas line.
The ignition failure on tankless water heaters can occur to any brand and model no matter how advanced or not is.
No hot water often related to the flame failure and no ignition water is too hot.
Undersized gas lines can place stress on the water heater reduce its expected lifespan and even be a warranty violation for some manufacturers.
Check your unit s manual for steps on what the code could mean and if it could possibly be an error.
But before trying to fix the unit let s go first through the troubleshooting checklist recommended by the manufacturers.
We ll come out to assess your tankless unit and identify the root cause.
