AO Smith pilot light goes out

AO Smith pilot light goes out

by Zara
(Milwaukee, Wisconsin)

My gas-powered AO Smith water heater was recently installed in my home's attic. The problem I am having is occasional; the gas burner outage, also the pilot goes out. Please help, can someone explain me how to troubleshoot my newly installed water heater and prevent the future problems.

Oh, yes, I forgot... the unit was professionally installed by my local plumber, here in Milwaukee.

Comments for AO Smith pilot light goes out

Average Rating starstarstarstarstar

Click here to add your own comments

Nov 10, 2015
Rating
starstarstarstarstar
Possible Explanation for AO Smith pilot light failures
by: Harmon

I, too, had a problem with the pilot light going out now and then on my AO Smith gas water heater. I finally traced the problem to the fact that I have an "all-house-fan" which pumps a high volume air from the house into the attic. Turning this fan on caused the water heater pilot failure. The house being quite air tight, the big in-rush of air as the fan started up caused a large drop in air pressure to occur throughout the house which depended on the water heater vent for equalization. The surge of air through the water heater vent was sufficient to blow out the pilot.

The solution was to open enough windows and/or doors whenever turning on the all-house fan so that the surge through the water heater vent was greatly reduced or eliminated.

Oct 01, 2013
Rating
starstarstarstarstar
Attic installation
by: Jordan

Sufficient air supply is the most important factor for gas water heaters installed in one home's attic. Period.

Enough air and the proper drafting will ensure that gas is burning correctly and that the products of combustion are transferred out safely. This is especially important during the summer time, when the temperature of the air in the attic is much higher that the rest of the house.

As your AO Smith heater utilizes the pilot light which burns constantly, it requires enough oxygen. If there is not enough air coming from the bottom of the heater, pilot light cannot operate properly and it goes out.

My recommendation is to check what is happening inside the combustion chamber if the sight window is present. By checking the flame pattern and its color (ideal is blue and stable flame) you can recognize is the gas burner starving for air or not.

The exhaust gases on the other side should have much higher temperature than surrounding air so the natural draft can efficiently remove the exhaust gases. Check outside is the end of the venting pipe at least two feet above the roof line, which will reduce the capping problem.

Poor ventilation is another reason for pilot outage as the air in the attic doesn't circulates and the oxygen is not present in sufficient amount.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Troubleshooting.

water heaters