Armstrong Furnace R40403-003 Control Board
Armstrong Furnace R40403-003 Blower Control Fan Timer Board
R40403-003 is the updated version for 40403-001
QUESTIONS & ANSWERS
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will this control board replace a 40403-001?
R40403-003 is the updated version for 40403-001
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I have a Armstrong Ulta SX 90 furnace. Model #GUK100D20-2B. It is 22 year old. will this board work on this furnace?
Yes it is.