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Old 03-29-2018, 03:36 PM   #1
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New Suburban SW6DE Water Heater Misbehaving

Replaced my water heater with a brand new identical SW6DE. On initial gas startup the flame was yellow and spluttering with quantities of soot. Diagnosis - insufficent air - removed black metal spring clip holding burner tube to gas nozzle and increased the air gap - great flame no soot. Heated water fine - drew off hot water - did not auto-restart - cold water.

Three questions. A. Why was the initial flame so bad straight out of the box when not supposed to be adjustable?

B. Why is the auto-restart so unreliable when the water cools?

C. The old unit worked fine on gas. Can I use the old PCB on the new unit without damaging the new unit or the old board?
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Old 03-29-2018, 04:23 PM   #2
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I don't have a positive answer on that. I'm sure someone will be along that has more knowledge.

Good luck, happy trails, and God bless!
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