02:49PM | 11/11/00
Member Since: 11/10/00
1 lifetime posts
The pilot light on our central heat goes out after (when?) the furnace burners go out, i.e. when the house thermostat is satisfied. The pilot dimishes in size when the burner goes on. When the burner goes off, the pilot flame generally is restored to the orginal size. Other times, the pilot flame, which ordinarily burns with a flame to the left and to the right burns only to the left side. Unfortunately, the thermocouple is on the right side of the pilot burner. As a result the pilot goes out when the thermocouple is no longer satisfied with a heat source.

It seems that when the pilot goes out, another thing happens. The blower stays on, ignoring the low-limit switch that should turn off the blower after the heat exchanger is cooled below 105 F.

Any ideas?



01:28AM | 11/12/00
Member Since: 02/19/00
206 lifetime posts
Your pilot orifice has to be cleaned. This should be done every year to assure reliable operation. The only thing that concerns me is the size of the flame whaen main burners come on. this may be an incomming gas problem,...but let's work on the pilot first to eleminate this problem. The blower fan switch is independant of any other part on the furnace. When they age, the fan switch falls out of calibration and will eventually need to be replaced.
Your pilot is held in by 2 screws and it will have to be removed to clean.
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