Atwood Water heater won't work on gas
I have a Atwood gas/electric water heater with DSI and it works fine on electric but does not work on gas. The gas valve does not open, the ignitor does not fire, the red light on the switch panel doe...
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13V on Orange wire from 'Gas' On/Off Switch to circuit board
So with gas switch ON
Check for DC Voltage on Brown wire (very bottom one---BRN 1 ) to thermal fuse ...to t-stat...and back to circuit board on brown wire (top one--BRN 3 )
This circuit MUST make up before DC Voltage can go to spark/gas valve
Thermal Fuse blows at 190*F...one time fuse
T-stat has to have DC Voltage to & thru it ---- water temp has to be below 110*F for it to CLOSE
Connectors need good contact on board
Then should have DC voltage on red wire (RED 4 ) to ECO then to Gas Valve solenoid
Check all grounds
Works on Electric ---same circuits(thermal fuse/t-stat/ECO etc
SO could be bad 'gas circuit' on board
So with gas switch ON
Check for DC Voltage on Brown wire (very bottom one---BRN 1 ) to thermal fuse ...to t-stat...and back to circuit board on brown wire (top one--BRN 3 )
This circuit MUST make up before DC Voltage can go to spark/gas valve
Thermal Fuse blows at 190*F...one time fuse
T-stat has to have DC Voltage to & thru it ---- water temp has to be below 110*F for it to CLOSE
Connectors need good contact on board
Then should have DC voltage on red wire (RED 4 ) to ECO then to Gas Valve solenoid
Check all grounds
Works on Electric ---same circuits(thermal fuse/t-stat/ECO etc
SO could be bad 'gas circuit' on board
