York gas furnace Code 7 ignition lockout due to retries

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Old 01-31-19, 12:52 AM
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York gas furnace Code 7 ignition lockout due to retries

12 year old upstairs furnace started up with this problem. After powering unit off and waiting a few minutes it would work. But randomly spits out code 7 (7 red blinking lights). Assumed it was the flame sensor.

Replaced today and then watched through the little window to see my quick fix in action. Same problem...multipe ignition attemps and then the same fault code. However, the far right burner didn't have a blue flame like the other three...and the flame sensor rod wasn't getting any gas.

Turned off the power, waited a few minutes, powered on, then all 4 burners came on. What would cause the far right burner (#4) to fail to ignite? The ignitor coil is on the far left and works fine.

MODEL GY9S080B12UP11G
 
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Old 01-31-19, 06:05 AM
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Burners may be dirty. They would have to be removed and cleaned.
Gas pressure also may be incorrect.
 
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