My furnace will start up normal but then after bout 3 to 5 mins the flame g...

my furnace will start up normal but then after bout 3 to 5 mins the flame goes out and blower stays on then after few mins the flame comes back on again it contintues to do this over and over again. have changed the flame sensor and control board now at a lose.

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JLMCDANIEL avatar
1 month ago #2
JLMCDANIEL
Master
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Votes: 63

A sign that you have improper return air flow. Could be as simple as a dirty or wrong filter or a locked air return.

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