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Why does the pilot light go out for no reason on my Kenmore Power Miser 12 hot water heater model 153.331543?

The pilot light will just be out when we discover we have no hot water. It lights fine and then will work for 3 to 6 weeks and then we find we have no hot water and the pilot light is out again. It has happened maybe 6 or 7 times in the last 8 months. At first I thought it may be when the wind is strong outside, but it has done this when we have no wind at all. Can the pilot light be adjusted up? If the thermocouple was bad why would it light okay after going out?

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Kenmore , Building Supplies , Home Improvement
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1 Answer from this member:
Lyle W
Here are some of the reasons why the pilot may not stay lit on your water heater:

Dirty pilot burner -- You may need to clean the pilot assembly.

Dirty or clogged air intake screen or flame arrester

Thermocouple TCO malfunction

Defective gas control valve

High ambient temperature in the room where the hot water heater is housed (115 degrees F or more)

Insufficient combustion/ventilation air supply

Improper vent design or operation

The pilot normally cannot be adjusted upward.

The thermocouple is normally not at fault if the pilot can be lit after the outage.

I recommend calling a service technician to diagnose and repair this type of water heater problem. A technician will have tools and specific training to examine your water heater and installation to determine the cause of this problem and fix it.
by Lyle W Earned 2,989 community points in Kenmore
April 23rd, 2009
Answered in 12 hours
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