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Old 08-15-2022, 01:27 PM   #1
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Fleetwood Owners Club
Spartan Chassis
Join Date: Oct 2019
Posts: 471
Attwood HWH No Ignition

Attwood electric & propane HWH will not light on propane. Electric is fine. Sequence: press button, gets gas, does not click, 3 attempts, then lockout. I pulled and cleaned the igniter/flame sensor. Verified the proper gap. Tried again but same symptoms. I did attempt to light it manually and it lit but did not stay lit as if the flame sensor was bad, but I suspect the board. What say you, Old Biscuit? I can live with just the electric but engaging the propane makes for longer hot showers.
2004 American Eagle, 40L
Cummins 400 ISL, Spartan Chassis
2009 Honda Fit Sport
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Old 08-15-2022, 04:36 PM   #2
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Posts: 24,088
2004 vintage.....

That should be the 1st version of the combined electric/gas controls
One set of t-stat/ECO, use DC for control of electric and gas etc
GC6AA-10E (6gal) GC10A-4E (10gal)

You state Electric works so that eliminates the 'thermal fuse'
No Spark but can light gas off using lighter/doesn't stay lit

Gas valve and Spark Electrode get energized at same time
Spark Electrode gets High Voltage from the Transformer on circuit board to ignite the gas and then is return path for Flame Proving Signal (milliamp)

No Spark....
Bad Ground
Bad High Voltage wire/connection
Bad Circuit Board

*replace with Dinosaur Electronics UIB 64 circuit board
(shop around pricing runs from $120---$215)

Note: if Water Heater is a 3E or 8E/9E model....different circuit board
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hwh, ignition

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