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The Water Cooler
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<blockquote data-quote="Viper16" data-source="post: 2709924" data-attributes="member: 1558"><p>The only thing the thermocouple does is keep the pilot valve lit, as long as it senses the heat from the flame it allows gas flow, so yes on older systems the flame sensor is, in essence, the thermocouple. </p><p></p><p>Flame sensors for newer systems use a flame rod...resistive to heat...it goes to a microcontroller that runs the blower, gas valves, safeties etc..</p></blockquote><p></p>
[QUOTE="Viper16, post: 2709924, member: 1558"] The only thing the thermocouple does is keep the pilot valve lit, as long as it senses the heat from the flame it allows gas flow, so yes on older systems the flame sensor is, in essence, the thermocouple. Flame sensors for newer systems use a flame rod...resistive to heat...it goes to a microcontroller that runs the blower, gas valves, safeties etc.. [/QUOTE]
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